Dell Precision Rack 7910 Owner's Manual

Regulatory Model: E31S Regulatory Type: E31S001

Notes, Cautions, and Warnings

NOTE: A NOTE indicates important information that helps you make better use of your computer.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

intellectual property laws. Dell™ and the Dell logo are trademarks of Dell Inc. in the United States and/or other jurisdictions. All other marks and names mentioned herein may be trademarks of their respective companies.

2014 - 08

Rev. A00

Contents

1 Working on Your Computer............................................................................... 8

Turning Off Your Computer..................................................................................................................8

2 LCD panel features............................................................................................... 9

Home screen......................................................................................................................................... 9

Setup menu......................................................................................................................................... 10

View menu...........................................................................................................................................10

3 Documentation matrix.......................................................................................11

4 Hard-drive indicator codes...............................................................................12

5 Installing and removing system components............................................... 14

Safety instructions............................................................................................................................... 14

Before working inside your system.................................................................................................... 14

After working inside your system........................................................................................................14

Recommended tools...........................................................................................................................14

System Overview................................................................................................................................. 15

Front bezel (optional).......................................................................................................................... 18

Removing the front bezel..............................................................................................................18

Installing the front bezel................................................................................................................19

Removing the system cover................................................................................................................19

Installing the system cover.................................................................................................................20

Inside the system.................................................................................................................................21

Cooling shroud....................................................................................................................................22

Removing the cooling shroud...................................................................................................... 23

Installing the cooling shroud........................................................................................................ 23

System memory.................................................................................................................................. 24

General memory module installation guidelines...............................................................................26

Sample memory configurations.........................................................................................................26

Removing memory modules..............................................................................................................29

Installing memory modules.................................................................................................................31

Hard drives...........................................................................................................................................33

Removing a 2.5 inch hard-drive blank............................................................................................... 33

Installing a 2.5 inch hard-drive blank................................................................................................. 34

Removing Hard Drive..........................................................................................................................34

Installing Hard Drive............................................................................................................................35

Removing a hard drive from a hard-drive carrier.............................................................................. 36

Installing a hard drive into a hard-drive carrier..................................................................................37

Optical drive (optional)....................................................................................................................... 38

Removing the optical drive...........................................................................................................38

Installing the optical drive.............................................................................................................39

Cooling fans........................................................................................................................................40

Removing a cooling fan......................................................................................................................40

Installing a cooling fan........................................................................................................................ 41

Removing the cooling-fan assembly................................................................................................. 42

Installing the cooling-fan assembly................................................................................................... 44

Internal USB memory key (optional).................................................................................................. 44

Replacing the internal USB key...........................................................................................................45

PCIe card holder................................................................................................................................. 45

Removing the PCIe card holder................................................................................................... 45

Installing the PCIe card holder......................................................................................................47

Opening and closing the PCIe card holder latch.........................................................................47

Cable retention bracket......................................................................................................................48

Removing the cable retention bracket.........................................................................................48

Installing the cable retention bracket...........................................................................................49

Expansion cards and expansion-card risers...................................................................................... 50

Expansion card installation guidelines......................................................................................... 50

Removing an expansion card from expansion-card riser 2 or 3.................................................50

Installing an expansion card into the expansion-card riser 2 or 3..............................................52

Removing an expansion card from the expansion-card riser 1.................................................. 53

Installing an expansion card into the expansion-card riser 1......................................................54

Removing the riser 1 blank............................................................................................................55

Installing the riser 1 blank..............................................................................................................56

Removing expansion-card risers..................................................................................................56

Installing expansion-card risers....................................................................................................62

GPU card installation guidelines...................................................................................................63

Installing a GPU card.....................................................................................................................63

Removing a GPU card...................................................................................................................64

SD vFlash media card..........................................................................................................................65

Replacing an SD vFlash media card..............................................................................................65

Internal dual SD module.....................................................................................................................66

Removing an internal SD card......................................................................................................66

Installing an internal SD card........................................................................................................ 67

Removing the internal dual SD module ...................................................................................... 67

Installing the internal dual SD module ........................................................................................ 69

Integrated storage controller card..................................................................................................... 70

Removing the integrated storage controller card....................................................................... 70

Installing the integrated storage controller card..........................................................................71

Network daughter card.......................................................................................................................72

Removing the network daughter card .........................................................................................72

Installing the network daughter card........................................................................................... 74

Processors........................................................................................................................................... 74

Removing a processor...................................................................................................................75

Installing a processor.................................................................................................................... 79

Power supply units.............................................................................................................................. 81

Hot Spare feature................................................................................................................................ 81

Removing the power supply unit blank............................................................................................. 82

Installing the power supply unit blank............................................................................................... 82

Removing an AC power supply unit...................................................................................................82

Installing an AC power supply unit.....................................................................................................84

System battery.....................................................................................................................................85

Replacing the system battery....................................................................................................... 85

Hard-drive backplane......................................................................................................................... 86

Removing the hard-drive backplane .................................................................................................87

Installing the hard-drive backplane ...................................................................................................88

Control panel assembly......................................................................................................................89

Removing the control panel ........................................................................................................89

Installing the control panel .......................................................................................................... 91

System board.......................................................................................................................................91

Removing the system board......................................................................................................... 91

Installing the system board...........................................................................................................94

Entering the system service tag using System Setup...................................................................95

Restoring the service tag using Easy Restore...............................................................................95

Updating the BIOS version............................................................................................................96

Re-enabling the TPM for TXT users............................................................................................. 96

6 Troubleshooting your system.......................................................................... 97

Safety first—for you and your system.................................................................................................97

Troubleshooting system startup failure..............................................................................................97

Troubleshooting external connections..............................................................................................97

Troubleshooting the video subsystem...............................................................................................97

Troubleshooting a USB device........................................................................................................... 97

Troubleshooting iDRAC Direct (USB XML configuration)................................................................. 98

Troubleshooting iDRAC Direct (laptop connection).........................................................................98

Troubleshooting a serial I/O device...................................................................................................99

Troubleshooting a NIC....................................................................................................................... 99

Troubleshooting a wet system...........................................................................................................99

Troubleshooting a damaged system............................................................................................... 100

Troubleshooting the system battery................................................................................................100

Troubleshooting power supply units................................................................................................101

Power source problems.............................................................................................................. 101

Power supply unit problems....................................................................................................... 101

Troubleshooting cooling problems................................................................................................. 102

Troubleshooting cooling fans.......................................................................................................... 102

Troubleshooting system memory....................................................................................................103

Troubleshooting an internal USB key...............................................................................................104

Troubleshooting an SD card.............................................................................................................104

Troubleshooting an optical drive..................................................................................................... 105

Troubleshooting a hard drive........................................................................................................... 105

Troubleshooting a storage controller..............................................................................................106

Troubleshooting expansion cards....................................................................................................106

Troubleshooting processors.............................................................................................................107

Error Messages.................................................................................................................................. 107

Errors That Halt the System CompletelyErrors That Soft Halts the SystemError That do

not Halt the system..................................................................................................................... 107

System messages..............................................................................................................................108

Warning messages...................................................................................................................... 108

Diagnostic messages.................................................................................................................. 108

Alert messages............................................................................................................................ 108

7 Using system diagnostics................................................................................ 110

Dell Embedded System Diagnostics.................................................................................................110

When to use the Embedded System Diagnostics...................................................................... 110

Running the Embedded System Diagnostics from Boot Manager............................................110

Running the Embedded System Diagnostics from the Dell Lifecycle Controller.....................110

System diagnostic controls..........................................................................................................111

8 Jumpers and connectors................................................................................ 112

System board jumper settings...........................................................................................................112

System board connectors................................................................................................................. 113

Disabling a forgotten password........................................................................................................ 115

9 Specifications.................................................................................................... 116

10 System Setup...................................................................................................122

Boot Menu......................................................................................................................................... 122

Timing Key Sequences......................................................................................................................122

Dell Diagnostics.................................................................................................................................123

About System Setup.......................................................................................................................... 123

Entering System Setup................................................................................................................ 123

System Setup Main Menu............................................................................................................123

System BIOS screen.................................................................................................................... 124

System Information screen details............................................................................................. 124

Memory Settings screen details..................................................................................................125

Processor Settings screen details............................................................................................... 126

SATA Settings screen details....................................................................................................... 128

Boot Settings screen details........................................................................................................130

Integrated Devices screen details............................................................................................... 131

Serial Communication screen details.........................................................................................133

System Profile Settings screen details........................................................................................ 133

System Security settings screen details......................................................................................135

Miscellaneous Settings screen details........................................................................................ 136

11 NIC indicator codes........................................................................................139

12 Power indicator codes.................................................................................. 140

13 Contacting Dell...............................................................................................142

Contacting Dell................................................................................................................................. 142

Quick Resource Locator (QRL).........................................................................................................142

Working on Your Computer

Turning Off Your Computer

CAUTION: To avoid losing data, save and close all open files and exit all open programs before you turn off your computer.

1. Shut down the operating system:

• In Windows 8:

– Using a touch-enabled device:

a. Swipe in from the right edge of the screen, opening the Charms menu and select

Settings.

b. Select the and then select Shut down

– Using a mouse:

a. Point to upper-right corner of the screen and click Settings.

b. Click the and select Shut down.

• In Windows 7:

1. Click Start .

2. Click Shut Down.

1. Click Start .

2. Click the arrow in the lower-right corner of the Start menu as shown below, and then click

Shut Down..

2. Ensure that the computer and all attached devices are turned off. If your computer and attached

devices did not automatically turn off when you shut down your operating system, press and hold the power button for about 6 seconds to turn them off.

LCD panel features

NOTE: The LCD panel is present only on Precision Rack 7910

The LCD panel of your system provides system information and status and error messages to indicate if the system is operating correctly or if the system needs attention. For more information on error messages, see the Dell Event and Error Messages Reference Guide at dell.com/esmmanuals.

• The LCD backlight lights blue during normal operating conditions and lights amber to indicate an

error condition.

• The LCD backlight is off when the system is in standby mode and can be turned on by pressing either

the Select, Left, or Right button on the LCD panel.

• The LCD backlight remains off if LCD messaging is turned off through the iDRAC utility, the LCD

panel, or other tools.

Figure 1. LCD panel features

Item Button Description

1 Left Moves the cursor back in one-step increments.

2 Select Selects the menu item highlighted by the cursor.

3 Right Moves the cursor forward in one-step increments.

During message scrolling:

• Press and hold the button to increase scrolling speed.

• Release the button to stop.

NOTE: The display will stop scrolling when the button is released. After 45 seconds of inactivity the display will start scrolling.

Home screen

The Home screen displays user-configurable information about the system. This screen is displayed during normal system operation when there are no status messages or errors. When the system is in standby mode, the LCD backlight turns off after five minutes of inactivity if there are no error messages. Press one of the three navigation buttons (Select, Left, or Right) to view the Home screen.

To navigate to the Home screen from another menu, continue to select the up arrow until the Home

icon is displayed, and then select the Home icon.

From the Home screen, press the Select button to enter the main menu.

Setup menu

NOTE: When you select an option in the Setup menu, you must confirm the option before proceeding to the next action.

Option Description

iDRAC Select DHCP or Static IP to configure the network mode. If Static IP is selected,

the available fields are IP, Subnet (Sub), and Gateway (Gtw). Select Setup DNS to enable DNS and to view domain addresses. Two separate DNS entries are available.

Set error Select SEL to display LCD error messages in a format that matches the IPMI

description in the SEL. This is useful when trying to match an LCD message with an SEL entry.

Select Simple to display LCD error messages in a simplified user-friendly description. For more information on error messages, see the Dell Event and Error Messages Reference Guide at dell.com/esmmanuals.

Set home Select the default information to be displayed on the LCD Home screen. See View

menu to see the options and option items that can be set as the default on the

Home screen.

View menu

NOTE: When you select an option in the View menu, you must confirm the option before proceeding to the next action.

Option Description

iDRAC IP Displays the IPv4 or IPv6 addresses for iDRAC8. Addresses include DNS (Primary

and Secondary), Gateway, IP, and Subnet (IPv6 does not have Subnet).

MAC Displays the MAC addresses for iDRAC, iSCSI, or Network devices.

Name Displays the name of the Host, Model, or User String for the system.

Number Displays the Asset tag or the Service tag for the system.

Power Displays the power output of the system in BTU/hr or Watts. The display format can

be configured in the Set home submenu of the Setup menu.

Temperature Displays the temperature of the system in Celsius or Fahrenheit. The display format

can be configured in the Set home submenu of the Setup menu.

Documentation matrix

The documentation matrix provides information on documents that you can refer to for setting up and managing your system.

To... Refer to...

Install your system into a rack Rack documentation included with your rack

solution

Set up your system and know the system technical specifications

Install the operating system Operating system documentation at dell.com/

Get an overview of the Dell Systems Management offerings

Configure and log in to iDRAC, set up managed and management system, know the iDRAC features and troubleshoot using iDRAC

Know about the RACADM subcommands and supported RACADM interfaces

Launch, enable and disable Lifecycle Controller, know the features, use and troubleshoot Lifecycle Controller

Use Lifecycle Controller Remote Services Dell Lifecycle Controller Remote Services Quick

Set up, use, and troubleshoot OpenManage Server Administrator

Install, use and troubleshoot OpenManage Essentials

Getting Started With Your System that shipped with your system or see dell.com/poweredgemanuals

operatingsystemmanuals

Dell OpenManage Systems Management Overview Guide at dell.com/openmanagemanuals

Integrated Dell Remote Access Controller User's Guide at dell.com/esmmanuals

RACADM Command Line Reference Guide for iDRAC and CMC at dell.com/esmmanuals

Dell Lifecycle Controller User’s Guide at dell.com/

esmmanuals

Start Guide at dell.com/esmmanuals

Dell OpenManage Server Administrator User’s Guide at dell.com/openmanagemanuals

Dell OpenManage Essentials User’s Guide at

dell.com/openmanagemanuals

Know the features of the storage controller cards, deploy the cards, and manage the storage subsystem

Check the event and error messages generated by the system firmware and agents that monitor system components

Storage controller documentation at dell.com/

storagecontrollermanuals

Dell Event and Error Messages Reference Guide at

dell.com/esmmanuals

Hard-drive indicator codes

Figure 2. Hard-drive indicators

1. hard-drive activity indicator 2. hard-drive status indicator

3. hard drive

Figure 3. Hard-drive indicators on the hard-drive tray backplane

1. hard-drive activity indicator 2. hard-drive status indicator

3. hard-drive backplane on hard-drive tray

NOTE: If the hard drive is in Advanced Host Controller Interface (AHCI) mode, the status indicator (on the right side) does not function and remains off.

Drive-status indicator pattern (RAID only) Condition

Blinks green two times per second Identifying drive or preparing for removal.

Off Drive ready for insertion or removal.

NOTE: The drive status indicator remains off until all hard drives are initialized after the system is turned on. Drives are not ready for insertion or removal during this time.

Blinks green, amber, and turns off Predicted drive failure

Blinks amber four times per second Drive failed

Blinks green slowly Drive rebuilding

Steady green Drive online

Blinks green three seconds, amber three seconds, and turns off six seconds

Rebuild aborted

Installing and removing system components

Safety instructions

WARNING: Whenever you need to lift the system, get others to assist you. To avoid injury, do not attempt to lift the system by yourself.

WARNING: Opening or removing the system cover when the system is on may expose you to a risk of electric shock.

CAUTION: Do not operate the system without the cover for a duration exceeding five minutes.

CAUTION: Many repairs may only be done by a certified service technician. You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that came with the product.

NOTE: It is recommended that you always use a static mat and static strap while working on components inside the system.

NOTE: To ensure proper operation and cooling, all bays in the system must be populated at all times with either a module or with a blank.

Before working inside your system

1. Turn off the system, including any attached peripherals.

2. Disconnect the system from the electrical outlet and disconnect the peripherals.

3. Remove the system cover.

After working inside your system

1. Install the system cover.

2. Reconnect the system to its electrical outlet.

3. Turn the system on, including any attached peripherals.

Recommended tools

You need the following tools to perform the removal and installation procedures:

• Key to the bezel lock. This is only required when you have a bezel.

• #2 Phillips screwdriver

For how-to videos, documentation, and troubleshooting solutions, scan this QR code, or click here:

http://www.Dell.com/QRL/Workstation/R7910

System Overview

Figure 4. Front and Back View

Item Indicator, Button, or

Connector

Icon Description

1 Power-on indicator,

power button

2 NMI button

3 System identification

button

The power-on indicator lights when the system power is on. The power button controls the power supply output to the system.

NOTE: On ACPI-compliant operating systems, turning off the system using the power button causes the system to perform a graceful shutdown before power to the system is turned off.

Used to troubleshoot software and device driver errors when running certain operating systems. This button can be pressed using the end of a paper clip.

Use this button only if directed to do so by qualified support personnel or by the operating system documentation.

The identification buttons on the front and back panels can be used to locate a particular system within a rack. When one of these buttons is pressed, the LCD panel on the front and the system status indicator on the back flashes until one of the buttons is pressed again.

Press to toggle the system ID on and off.

If the system stops responding during POST, press and hold the system ID button for more than five seconds to enter BIOS progress mode.

To reset iDRAC (if not disabled in F2 iDRAC setup) press and hold the button for more than 15 seconds.

4 Video connector Allows you to connect a VGA display to the

system.

5 LCD menu buttons Allow you to navigate the control panel LCD

menu.

6 Information tag A slide-out label panel which allows you to record

system information such as Service Tag, NIC, MAC address and so on as per your need.

7 LCD panel Displays system ID, status information, and system

error messages. The LCD lights blue during normal system operation. The LCD lights amber when the system needs attention, and the LCD panel displays an error code followed by descriptive text.

Item Indicator, Button, or

Connector

8 Hard drives Up to eight 2.5 inch drives.

9 vFlash media card slot Allows you to insert a vFlash media card.

10 USB connector Allows you to connect USB devices to the system.

11 USB management port/

iDRAC Direct

12 Optical drive (optional) One optional SATA DVD-ROM drive or DVD+/-RW

Icon Description

NOTE: If the system is connected to a power source and an error is detected, the LCD lights amber regardless of whether the system is turned on or off.

The ports are USB 2.0-compliant.

Allows you to connect USB devices to the system or provides access to the iDRAC Direct features. For more information, see the Integrated Dell Remote Access Controller User’s Guide at dell.com/esmmanuals. The USB management port is USB 2.0-compliant.

drive.

13 System identification

button

14 System identification

connector

15 iDRAC8 Enterprise port Dedicated management port.

The identification buttons on the front and back panels can be used to locate a particular system within a rack.

Precision Rack 7910

Press to toggle the system ID on and off.

If the system stops responding during POST, press and hold the system ID button for more than five seconds to enter BIOS progress mode.

To reset iDRAC (if not disabled in F2 iDRAC setup) press and hold the button for more than 15 seconds.

Connects the optional system status indicator assembly through the optional cable management arm.

When one of these buttons is pressed, the LCD panel on the front and the system status indicator on the back flashes until one of the buttons is pressed again.

16 Half-height PCIe

expansion-card slot (3)

Allows you to connect up to three half-height PCI Express expansion cards.

Item Indicator, Button, or

Connector

17 Serial connector Allows you to connect a serial device to the

18 Video connector Allows you to connect a VGA display to the

19 USB connector (2) Allows you to connect USB devices to the system.

Icon Description

system.

The ports are USB 2.0-compliant.

20 Full-height PCIe

expansion card slot (4)

21 Ethernet connector (4) Four integrated 10/100/1000 Mbps NIC

22 Power supply unit

Allows you to connect up to four single wall or two double wide PCI Express expansion cards.

connectors or

Four integrated connectors that include:

• Two 10/100/1000 Mbps NIC connectors

• Two 100 Mbps/1 Gbps/10 Gbps NIC connectors

AC 1100 W

Front bezel (optional)

Removing the front bezel

1. Unlock the bezel lock at the left end of the bezel.

2. Lift the release latch next to the bezel lock.

3. Pull the left end of the bezel, unhook the right end and remove the bezel.

Figure 5. Removing and installing the front bezel

1. bezel lock 2. front bezel

Installing the front bezel

1. Hook the right end of the bezel onto the chassis.

2. Fit the free end of the bezel onto the system.

3. Secure the bezel with the keylock.

Removing the system cover

1. Ensure that you read the Safety instructions.

2. Turn off the system, including any attached peripherals.

3. Disconnect the system from the electrical outlet and peripherals.

4. Rotate the latch release lock counter clockwise to the unlocked position.

5. Lift the latch and rotate the latch toward the back of the system.

6. Hold the cover on both sides, and lift the cover away from the system.

1. system cover

2. latch

3. latch release lock

To see a video on removing and installing System Cover, scan this QR code, or click here: http://

www.Dell.com/QRL/Workstation/R7910/Cover

Installing the system cover

Ensure that you read the Safety instructions. To see a video on removing and installing System Cover, scan this QR code, or click here: http://

www.Dell.com/QRL/Workstation/R7910/Cover

1. Align the slots of the system cover with the tabs on the chassis.

2. Press the cover release latch, and push the cover toward the front of the chassis until the latch locks

into place.

3. Turn the latch release lock clockwise to the locked position.

4. Install the optional bezel.

5. Reconnect the system to its electrical outlet and turn the system on, including any attached

peripherals.

Inside the system

Figure 6. Inside the system—Precision Rack 7910

1. cooling-fan (6)

2. processor (2)

3. DIMM (24)

4. PCIe card holder

5. internal USB port

6. power supply unit (2)

7. expansion-card riser (3)

8. network daughter card

9. expansion-card riser (2)

10. expansion-card riser (1)

11. hard-drive backplane

Cooling shroud

Removing the cooling shroud

1. Ensure that you read the Safety instructions.

2. Follow the procedure listed in Before working inside your system.

3. If installed, remove the full-length PCIe cards.

CAUTION: Never operate your system with the cooling shroud removed. The system may get overheated quickly, resulting in shutdown of the system and loss of data.

Hold the shroud and lift it away from the system.

Figure 7. Removing and installing the cooling shroud

1. cooling shroud 2. touch point (2)

1. Replace the cooling shroud. See Installing the cooling shroud

2. Follow the procedure listed in After working inside your system.

Installing the cooling shroud

1. Ensure that you read the Safety instructions.

2. Align the tabs on the cooling shroud with the securing slots on the chassis.

3. Lower the cooling shroud into the chassis until it is firmly seated.

4. Follow the procedure listed in After working inside your system.

System memory

Your system supports DDR4 registered DIMMs (RDIMMs), and load reduced DIMMs (LRDIMMs).

NOTE: MT/s indicates DIMM speed in MegaTransfers per second.

Memory bus operating frequency can be 1866 MT/s, or 2133 MT/s depending on the following factors:

• DIMM type (RDIMM or LRDIMM)

• Number of DIMMs populated per channel

• System profile selected (for example, Performance Optimized, Custom, or Dense Configuration Optimized)

• Maximum supported DIMM frequency of the processors

The system contains 24 memory sockets split into two sets of 12 sockets, one set per processor. Each 12socket set is organized into four channels. In each channel, the release levers of the first socket are marked white, the second socket black, and the third socket green.

NOTE: DIMMs in sockets A1 to A12 are assigned to processor 1 and DIMMs in sockets B1 to B12 are assigned to processor 2.

Memory channels are organized as follows:

Processor 1 channel 0: slots A1, A5, and A9

channel 1: slots A2, A6, and A10

channel 2: slots A3, A7, and A11

channel 3: slots A4, A8, and A12

Processor 2 channel 0: slots B1, B5, and B9

channel 1: slots B2, B6, and B10

channel 2: slots B3, B7, and B11

channel 3: slots B4, B8, and B12

The following table shows the memory populations and operating frequencies for the supported configurations.

DIMM Type DIMMs Populated/

Channel

RDIMM 1 2133, 1866, 1600, 1333 Dual rank or single rank

2 2133, 1866, 1600, 1333 Dual rank or single rank

3 1866, 1600, 1333 Dual rank or single rank

LRDIMM 1 2133, 1866, 1600, 1333 Quad rank

2 2133, 1866, 1600, 1333 Quad rank

3 1866, 1600, 1333 Quad rank

Operating Frequency (in

MT/s)

1.2 V

Maximum DIMM Rank/Channel

General memory module installation guidelines

This system supports Flexible Memory Configuration, enabling the system to be configured and run in any valid chipset architectural configuration. The following are the recommended guidelines for installing memory modules:

• RDIMMs and LRDIMMs must not be mixed.

• x4 and x8 DRAM based DIMMs can be mixed.

• Up to three dual- or single-rank RDIMMs can be populated per channel.

• Up to three LRDIMMs can be populated per channel regardless of rank count.

• Populate DIMM sockets only if a processor is installed. For single-processor systems, sockets A1 to A12 are available. For dual-processor systems, sockets A1 to A12 and sockets B1 to B12 are available.

• Populate all sockets with white release tabs first, then black, and then green.

• Populate the sockets by highest rank count in the following order — first in sockets with white release levers, then black, and then green. For example, if you want to mix single-rank and dual-rank DIMMs, populate dual-rank DIMMs in the sockets with white release tabs and single-rank DIMMs in the sockets with black release tabs.

• When mixing memory modules with different capacities, populate the sockets with memory modules with highest capacity first. For example, if you want to mix 4 GB and 8 GB DIMMs, populate 8 GB DIMMs in the sockets with white release tabs and 4 GB DIMMs in the sockets with black release tabs.

• In a dual-processor configuration, the memory configuration for each processor should be identical. For example, if you populate socket A1 for processor 1, then populate socket B1 for processor 2, and so on.

• Memory modules of different capacities can be mixed provided other memory population rules are followed (for example, 4 GB and 8 GB memory modules can be mixed).

• Mixing of more than two DIMM capacities in a system is not supported.

• Populate four DIMMs per processor (one DIMM per channel) at a time to maximize performance.

Sample memory configurations

The following tables show sample memory configurations for one and two processor configurations that follow the appropriate memory guidelines.

NOTE: 1R, 2R, and 4R in the following tables indicate single-, dual-, and quad-rank DIMMs respectively.

Table 1. Memory configurations—single processor

System capacity (in

DIMM size (in GB)

Number of DIMMs

GB)

4 4 1

8 4 2

16 4 4

8 2

24 4 6

48 4 12

DIMM rank, organization, and frequency

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

1R, x8, 1600 MT/s

DIMM slot population

A1, A2

A1, A2, A3, A4

A1, A2

A1, A2, A3, A4, A5, A6

A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12

8 6

96 8 12

16 6

128 16 8

144 16 and 8 10

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

2R, x8 1600 MT/s

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s,

2R, x4 and 2R, x8, 1866 MT/s

2R, x4 and 2R, x8, 1600 MT/s

A1, A2, A3, A4, A5, A6

A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12

A1, A2, A3, A4, A5, A6

A1, A2, A3, A4, A5, A6, A7, A8

A1, A2, A3, A4, A5, A6, A7, A8, A9, A11

System capacity (in GB)

DIMM size (in GB)

Number of DIMMs

DIMM rank, organization, and frequency

DIMM slot population

NOTE: 16 GB DIMMs must be installed in slots numbered A1, A2, A3, A4, A5, A6, A7, and A8 and 8 GB DIMMs must be installed in slots A9 and A11.

384 32 12

Table 2. Memory configurations—two processors

System capacity (in

DIMM size (in GB)

Number of DIMMs

GB)

16 4 4

32 4 8

64 4 16

8 8

96 4 24

LRDIMM, x4, 1866 MT/s

LRDIMM, x4, 1600 MT/s

DIMM rank, organization, and frequency

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

1R, x8, 2133 MT/s,

1R, x8, 1866 MT/s

1R, x8, 2133 MT/s

1R, x8, 1866 MT/s

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

1R, x8, 1866 MT/s

1R, x8, 1600 MT/s

A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12

DIMM slot population

A1, A2, B1, B2

A1, A2, A3, A4, B1, B2, B3, B4

A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3, B4, B5, B6, B7, B8

A1, A2, A3, A4, B1, B2, B3, B4

A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12

8 12

128 8 16

16 8

2R, x8, 2133 MT/s,

2R, x8, 1866 MT/s

2R, x8, 2133 MT/s

2R, x8, 1866 MT/s

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s

A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5, B6

A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3, B4, B5, B6, B7, B8

A1, A2, A3, A4, B1, B2, B3, B4

System capacity (in GB)

160 8 20

DIMM size (in GB)

Number of DIMMs

DIMM rank, organization, and frequency

2R, x8, 1866 MT/s

2R, x8, 1600 MT/s

DIMM slot population

A1, A2, A3, A4, A5, A6, A7, A8, A9, A11, B1, B2, B3, B4, B5, B6, B7, B8, B9, B11

16 and 8 12

192 8 24

16 12

256 16 16

384 16 24

32 12

2R, x4, 2133 MT/s,

2R, x8, 2133 MT/s,

2R, x4, 1866 MT/s

2R, x8, 1866 MT/s

2R, x8, 1600 MT/s

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s

2R, x4, 2133 MT/s,

2R, x4, 1866 MT/s,

2R, x4, 1600 MT/s,

LRDIMM, 4R, x4, 2133 MT/s

A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5, B6

NOTE: 16 GB DIMMs must be installed in slots numbered A1, A2, A3, A4, B1, B2, B3, and B4 and 8 GB DIMMs must be installed in slots A5, A6, B5, and B6.

A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12

A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5, B6

A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3, B4, B5, B6, B7, B8

A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12

A1, A2, A3, A4, A5, A6, B1, B2, B3, B4, B5, B6

512 32 16

768 32 24

LRDIMM, 4R, x4, 2133 MT/s

LRDIMM, 4R, x4, 1866 MT/s

LRDIMM, 4R, x4, 1600 MT/s

A1, A2, A3, A4, A5, A6, A7, A8, B1, B2, B3, B4, B5, B6, B7, B8

A1, A2, A3, A4, A5, A6, A7, A8, A9, A10, A11, A12, B1, B2, B3, B4, B5, B6, B7, B8, B9, B10, B11, B12

Removing memory modules

1. Ensure that you read the Safety instructions.

2. Follow the procedure listed in Before working inside your system.

3. Remove the cooling shroud.

WARNING: The memory modules are hot to the touch for some time after the system has been powered down. Allow time for the memory modules to cool before handling them. Handle the memory modules by the card edges and avoid touching the components or metallic contacts on the memory module.

CAUTION: To ensure proper system cooling, memory-module blanks must be installed in any memory socket that is not occupied. Remove memory-module blanks only if you intend to install memory modules in those sockets.

1. Locate the appropriate memory module socket.

CAUTION: Handle each memory module only by the card edges, making sure not to touch the middle of the memory module or gold contacts.

2. To release the memory module from the socket, simultaneously press the ejectors on both ends of

the memory-module socket.

Figure 8. Removing memory module

1. memory-module 2. memory-module socket

3. memory module socket ejector (2)

To see a video on removing and installing memory module, scan this QR code, or click here: http://

www.Dell.com/QRL/Workstation/R7910/DIMMs

+ 112 hidden pages

Dell Precision Rack 7910 Owner's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Working on Your Computer

Turning Off Your Computer

LCD panel features

Home screen

Setup menu

View menu

Documentation matrix

Hard-drive indicator codes

Installing and removing system components

Safety instructions

Before working inside your system

After working inside your system

Recommended tools

System Overview

Front bezel (optional)

Removing the front bezel

Installing the front bezel

Removing the system cover

Installing the system cover

Inside the system

Cooling shroud

Removing the cooling shroud

Installing the cooling shroud

System memory

General memory module installation guidelines

Sample memory configurations

Removing memory modules