HP ELITEDESK 800 G1 E3T21UT User Manual

Hardware Reference Guide

HP EliteDesk 800 G1 Tower HP EliteDesk 800 G1 Small Form Factor HP EliteDesk 800 G1 Ultra-slim Desktop

Microsoft® and Windows® are U.S. registered trademarks of Microsoft Corporation.

The only warranties for HP products and services are set forth in the express warranty statements accompanying such products and services. Nothing herein should be construed as constituting an additional warranty. HP shall not be liable for technical or editorial errors or omissions contained herein.

This document contains proprietary information that is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Hewlett-Packard Company.

Hardware Reference Guide

HP EliteDesk 800 G1 Tower

HP EliteDesk 800 G1 Small Form Factor

HP EliteDesk 800 G1 Ultra-slim Desktop

First Edition (April 2013)

Document part number: 719014–001

About this book

This guide provides basic information for upgrading HP EliteDesk Business PCs.

WARNING! Text set off in this manner indicates that failure to follow directions could result in bodily

harm or loss of life.

CAUTION: Text set off in this manner indicates that failure to follow directions could result in

damage to equipment or loss of information.

NOTE: Text set off in this manner provides important supplemental information.

ENWW iii

iv About this book ENWW

Table of contents

1 Product features ............................................................................................................................................. 1

Standard configuration features ........................................................................................................... 1

Tower (TWR) ....................................................................................................................... 1

Small Form Factor (SFF) ..................................................................................................... 2

Ultra-slim Desktop (USDT) .................................................................................................. 2

Tower (TWR) front panel components ................................................................................................. 3

Small Form Factor (SFF) front panel components ............................................................................... 4

Ultra-slim Desktop (USDT) front panel components ............................................................................ 5

Tower (TWR) rear panel components .................................................................................................. 6

Small Form Factor (SFF) rear panel components ................................................................................ 7

Ultra-slim Desktop (USDT) rear panel components ............................................................................. 8

Media card reader components ............................................................................................................ 9

Keyboard ............................................................................................................................................ 10

Using the Windows logo key .............................................................................................. 10

Serial number location ........................................................................................................................ 12

Tower (TWR) ..................................................................................................................... 12

Small Form Factor (SFF) ................................................................................................... 12

Ultra-slim Desktop (USDT) ................................................................................................ 13

2 Tower (TWR) hardware upgrades ................................................................................................................ 14

Serviceability features ........................................................................................................................ 14

Warnings and cautions ....................................................................................................................... 14

Removing the computer access panel ............................................................................................... 15

Replacing the computer access panel ............................................................................................... 16

Removing the front bezel ................................................................................................................... 17

Removing bezel blanks ...................................................................................................................... 18

Replacing the front bezel .................................................................................................................... 19

System board connections ................................................................................................................. 20

Installing additional memory ............................................................................................................... 21

DIMMs ............................................................................................................................... 21

DDR3-SDRAM DIMMs ...................................................................................................... 21

Populating DIMM sockets .................................................................................................. 22

ENWW v

Installing DIMMs ................................................................................................................ 23

Removing or installing an expansion card .......................................................................................... 25

Drive positions .................................................................................................................................... 29

Installing and removing drives ............................................................................................................ 30

Removing a 5.25-inch drive ............................................................................................... 32

Installing a 5.25-inch drive ................................................................................................. 33

Removing a 3.5-inch device .............................................................................................. 36

Installing a 3.5-inch device ................................................................................................ 38

Removing a slim optical drive ............................................................................................ 40

Installing a slim optical drive .............................................................................................. 41

Removing a 3.5-inch or 2.5-inch hard drive ....................................................................... 44

Installing a 3.5-inch or 2.5-inch hard drive ......................................................................... 45

Installing a security lock ..................................................................................................................... 50

Cable lock .......................................................................................................................... 50

Padlock .............................................................................................................................. 50

HP business PC security lock ............................................................................................ 51

Front bezel security ........................................................................................................... 55

3 Small Form Factor (SFF) hardware upgrades ............................................................................................ 57

Serviceability features ........................................................................................................................ 57

Warnings and cautions ....................................................................................................................... 57

Removing the computer access panel ............................................................................................... 58

Replacing the computer access panel ............................................................................................... 59

Removing the front bezel ................................................................................................................... 60

Removing bezel blanks ...................................................................................................................... 61

Replacing the front bezel .................................................................................................................... 62

Changing from desktop to tower configuration ................................................................................... 63

System board connections ................................................................................................................. 64

Installing additional memory ............................................................................................................... 65

DIMMs ............................................................................................................................... 65

DDR3-SDRAM DIMMs ...................................................................................................... 65

Populating DIMM sockets .................................................................................................. 65

Installing DIMMs ................................................................................................................ 66

Removing or installing an expansion card ......................................................................................

Drive positions .................................................................................................................................... 72

Installing and removing drives ............................................................................................................ 73

Removing a 3.5-inch device .............................................................................................. 75

Installing a 3.5-inch device ................................................................................................ 77

Removing a slim optical drive ............................................................................................ 80

Installing a slim optical drive .............................................................................................. 81

Removing and replacing a 3.5-inch hard drive .................................................................. 82

.... 68

vi ENWW

Removing a 2.5-inch hard drive ......................................................................................... 86

Installing a 2.5-inch hard drive ........................................................................................... 88

Installing a security lock ..................................................................................................................... 91

Cable lock .......................................................................................................................... 91

Padlock .............................................................................................................................. 91

HP business PC security lock ............................................................................................ 92

Front bezel security ........................................................................................................... 96

4 Ultra-slim Desktop (USDT) hardware upgrades ......................................................................................... 98

Serviceability features ........................................................................................................................ 98

Warnings and cautions ....................................................................................................................... 98

Connecting the power cord ................................................................................................................ 99

Removing the computer access panel ............................................................................................. 100

Replacing the computer access panel ............................................................................................. 101

Removing the front bezel ................................................................................................................. 102

Removing a bezel blank ................................................................................................................... 103

Replacing the front bezel .................................................................................................................. 104

Changing from desktop to tower configuration ................................................................................. 105

System board connections ............................................................................................................... 106

Installing additional memory ............................................................................................................. 107

SODIMMs ........................................................................................................................ 107

DDR3-SDRAM SODIMMs ............................................................................................... 107

Populating SODIMM sockets ........................................................................................... 108

Installing SODIMMs ......................................................................................................... 109

Replacing the optical drive ............................................................................................................... 111

Removing the optical drive .............................................................................................. 111

Preparing the new optical drive ....................................................................................... 112

Installing the new optical drive ......................................................................................... 113

Replacing the hard drive .................................................................................................................. 114

Installing and removing a port cover ................................................................................................ 118

Installing a security lock ................................................................................................................... 119

Cable lock ........................................................................................................................ 119

Padlock ............................................................................................................................ 120

HP business PC security lock .......................................................................................... 120

Front bezel security ......................................................................................................... 124

Appendix A Battery replacement ................................................................................................................. 126

Appendix B Unlocking the Smart Cover Lock ............................................................................................ 129

Smart Cover FailSafe Key ................................................................................................................ 129

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Using the Smart Cover FailSafe Key to remove the Smart Cover Lock ........................................... 130

Appendix C Electrostatic discharge ............................................................................................................ 132

Preventing electrostatic damage ...................................................................................................... 132

Grounding methods .......................................................................................................................... 132

Appendix D Computer operating guidelines, routine care and shipping preparation ............................ 133

Computer operating guidelines and routine care ............................................................................. 133

Optical drive precautions .................................................................................................................. 134

Operation ......................................................................................................................... 134

Cleaning ........................................................................................................................... 134

Safety ............................................................................................................................... 134

Shipping preparation ........................................................................................................................ 134

Index ................................................................................................................................................................. 135

viii ENWW

1 Product features

Standard configuration features

Features may vary depending on the model. For a complete listing of the hardware and software installed in the computer, run the diagnostic utility (included on some computer models only).

NOTE: All three computer models can be used in a tower orientation or a desktop orientation.

Tower (TWR)

ENWW Standard configuration features 1

Small Form Factor (SFF)

Ultra-slim Desktop (USDT)

2 Chapter 1 Product features ENWW

Tower (TWR) front panel components

Drive configuration may vary by model. Some models have a bezel blank covering one or more drive bays.

1 5.25-inch Half-Height Drive Bay (behind bezel) 6 Hard Drive Activity Light

2 USB 2.0 Ports (black) 7 Slim Optical Drive (optional)

3 USB 3.0 Ports (blue) 8 3.5-inch Media Card Reader (optional)

4 Headphone Connector 9 Microphone/Headphone Connector

5 Dual-State Power Button

NOTE: When a device is plugged into the Microphone/Headphone Connector, a dialog box will pop up asking if

you want to use the connector for a microphone Line-In device or a headphone. You can reconfigure the connector at any time by double-clicking the Audio Manager icon in the Windows taskbar.

NOTE: The Power On Light is normally white when the power is on. If it is flashing red, there is a problem with

the computer and it is displaying a diagnostic code. Refer to the Maintenance and Service Guide to interpret the code.

ENWW Tower (TWR) front panel components 3

Small Form Factor (SFF) front panel components

Drive configuration may vary by model. Some models have a bezel blank covering one or more drive bays.

1 Slim Optical Drive (optional) 5 Headphone Connector

2 USB 2.0 Ports (black) 6 Dual-State Power Button

3 USB 3.0 Ports (blue) 7 Hard Drive Activity Light

4 Microphone/Headphone Connector 8 3.5-inch Media Card Reader (optional)

NOTE: When a device is plugged into the Microphone/Headphone Connector, a dialog box will pop up asking if

you want to use the connector for a microphone Line-In device or a headphone. You can reconfigure the connector at any time by double-clicking the Audio Manager icon in the Windows taskbar.

NOTE: The Power On Light is normally white when the power is on. If it is flashing red, there is a problem with

the computer and it is displaying a diagnostic code. Refer to the Maintenance and Service Guide to interpret the code.

4 Chapter 1 Product features ENWW

Ultra-slim Desktop (USDT) front panel components

Drive configuration may vary by model. Some models have a bezel blank covering the optical drive bay.

1 Slim Optical Drive (optional) 5 Headphone Connector

2 USB 2.0 Ports (black) 6 Hard Drive Activity Light

3 USB 3.0 Ports (blue) 7 Dual-State Power Button

4 Microphone/Headphone Connector 8 SD Media Card Reader (optional)

NOTE: When a device is plugged into the Microphone/Headphone Connector, a dialog box will pop up asking if

you want to use the connector for a microphone Line-In device or a headphone. You can reconfigure the connector at any time by double-clicking the Audio Manager icon in the Windows taskbar.

NOTE: The Power On Light is normally white when the power is on. If it is flashing red, there is a problem with

the computer and it is displaying a diagnostic code. Refer to the Maintenance and Service Guide to interpret the code.

ENWW Ultra-slim Desktop (USDT) front panel components 5

Tower (TWR) rear panel components

1 Power Cord Connector 7 Line-Out Connector for powered audio

NOTE: An optional second serial port and an optional parallel port are available from HP.

When a device is plugged into the blue Line-In Audio Connector, a dialog box will pop up asking if you want to use the connector for a line-in device or a microphone. You can reconfigure the connector at any time by doubleclicking the Audio Manager icon in the Windows taskbar.

When a graphics card is installed in one of the system board slots, the video connectors on the graphics card and the integrated graphics on the system board may be used at the same time. However, for such a configuration, only the display connected to the discrete graphics card will display POST messages.

The system board graphics can be disabled by changing settings in Computer Setup.

PS/2 Keyboard Connector (purple) 8 PS/2 Mouse Connector (green)

USB 2.0 Ports (black) 9 RJ-45 Network Connector

DisplayPort Monitor Connectors 10 Serial Connector

VGA Monitor Connector 11 Line-In Audio Connector (blue)

USB 3.0 Ports (blue)

devices (green)

6 Chapter 1 Product features ENWW

Small Form Factor (SFF) rear panel components

1 PS/2 Mouse Connector (green) 7 PS/2 Keyboard Connector (purple)

6 Power Cord Connector

NOTE: An optional second serial port and an optional parallel port are available from HP.

The system board graphics can be disabled by changing settings in Computer Setup.

RJ-45 Network Connector 8 DisplayPort Monitor Connectors

Serial Connector 9 VGA Monitor Connector

USB 2.0 Ports (black) 10 USB 3.0 Ports (blue)

Line-In Audio Connector (blue) 11 Line-Out Connector for powered audio

devices (green)

ENWW Small Form Factor (SFF) rear panel components 7

Ultra-slim Desktop (USDT) rear panel components

1 Line-Out Connector for powered audio

NOTE: When a device is plugged into the blue Line-In Audio Connector, a dialog box will pop up asking if you

want to use the connector for a line-in device or a microphone. You can reconfigure the connector at any time by double-clicking the Audio Manager icon in the Windows taskbar.

If an MXM graphics card is installed, all of the video connectors may be used at the same time. However, for such a configuration, only the display connected to the upper DisplayPort will display POST messages.

The system board graphics can be disabled by changing settings in Computer Setup.

devices (green)

USB 2.0 Ports (black) 7 Power Cord Connector

USB 3.0 Ports (blue) 8 Line-In Audio Connector (blue)

DisplayPort Monitor Connectors 9 RJ-45 Network Connector

PS/2 Keyboard Connector (purple) 10 PS/2 Mouse Connector (green)

6 VGA Monitor Connector

8 Chapter 1 Product features ENWW

Media card reader components

The media card reader is an optional device available on some models only. Refer to the following illustration and table to identify the media card reader components.

No. Slot Media

1 SD/HC/XC/UHS-1/Plus

2 Media Card Reader

Activity Light

3 CompactFlash I/II

4 MS PRO/MS PRO Duo

Secure Digital (SD)

●

CompactFlash Card

●

Type 1

Memory Stick (MS)

●

● Memory Stick Select

● Memory Stick PRO

(MS PRO)

Secure Digital High

●

Capacity (SDHC)

CompactFlash Card

●

Type 2

Memory Stick

●

MagicGate

● Memory Stick Duo

(MS Duo)

Memory Stick PRO

●

Duo (MS PRO Duo)

Secure Digital

●

Extended Capacity Memory Card (SDXC)

MicroDrive

●

Memory Stick

●

MagicGate Duo

● Memory Stick PRO-

HG Duo

ENWW Media card reader components 9

Keyboard

Component Component

1 Sleep 6 Mute volume

2 Fast reverse 7 Decrease volume

3 Play/pause 8 Increase volume

4 Stop 9 Windows logo key

5 Fast forward 10 Function

Using the Windows logo key

Use the Windows Logo key in combination with other keys to perform certain functions available in the Windows operating system.

Windows Logo Key + Windows 7 Windows 8

no other key Displays the Start menu Displays the Start screen

c Opens charms

d Displays the Desktop Displays the Desktop

e Launches My Computer Opens Windows Explorer

f Launches Find Document Goes to files in Search charm

Ctrl + f Launches Find Computer Launches Find Computer

g Cycles through gadgets Cycles through gadgets

h Goes to Share charm

i Goes to Settings charm

k Goes to Devices charm

10 Chapter 1 Product features ENWW

Windows Logo Key + Windows 7 Windows 8

l Locks the computer if you are connected to

a network domain, or allows you to switch users if you are not connected to a network domain

m Minimizes all open applications Minimizes all open applications

o Locks screen orientation

p Choose a presentation display mode Opens projection options

q Goes to Search charm

r Launches the Run dialog box Launches the Run dialog box

t Cycles through programs on the taskbar Cycles through programs on the taskbar

u Launches Ease of Access Center Launches Ease of Access Center

v Cycles through notifications

w Goes to Settings in Search charm

x Opens Windows Mobility Center if present Opens Windows Mobility Center if present

z Opens applications bar

F1 Launches Windows Help Launches Windows Help

Tab Cycles through programs on the Taskbar

using the Windows Flip 3-D

Locks the computer if you are connected to a network domain, or allows you to switch users if you are not connected to a network domain

Cycles through metro application history

Ctrl + Tab Use the arrow keys to cycle through

programs on the Taskbar by using Windows Flip 3-D

Spacebar Brings all gadgets to the front and select

any number key Goes to the application at the given position

up arrow Maximizes the window Maximizes the desktop window

left arrow Snaps the window to the left side of the

right arrow Snaps the window to the right side of the

down arrow Minimizes the window Minimizes the desktop window

Shift + left arrow or right arrow

, (comma) Peeks at the desktop

. (period) Snap a metro application to the right

Shift + . (period) Snap a metro application to the left

Enter Launches Narrator

Windows Sidebar

on the taskbar

screen

Moves a window from one monitor to another

Use the arrow keys to cycle through metro application history

Switches input language and keyboard layout

Goes to the application at the given position on the taskbar

Snaps the desktop window to the left side of the screen

Snaps the desktop window to the right side of the screen

Moves a window from one monitor to another

Esc Exits Magnifier

+ (on numpad) Zooms in Zooms in (Magnifier)

ENWW Keyboard 11

Windows Logo Key + Windows 7 Windows 8

- (on numpad) Zooms out Zooms out (Magnifier)

Home Minimizes non-active desktop windows Minimizes non-active desktop windows

Break Displays System Properties Displays System Properties

PgUp Moves Start screen to left monitor

PgDn Moves Start screen to right monitor

Serial number location

Each computer has a unique serial number and a product ID number that are located on the exterior of the computer. Keep these numbers available for use when contacting customer service for assistance.

Tower (TWR)

Small Form Factor (SFF)

12 Chapter 1 Product features ENWW

Ultra-slim Desktop (USDT)

ENWW Serial number location 13

2 Tower (TWR) hardware upgrades

Serviceability features

The computer includes features that make it easy to upgrade and service. No tools are needed for most of the installation procedures described in this chapter.

Warnings and cautions

Before performing upgrades be sure to carefully read all of the applicable instructions, cautions, and warnings in this guide.

WARNING! To reduce the risk of personal injury from electrical shock, hot surfaces, or fire:

Disconnect the power cord from the wall outlet and allow the internal system components to cool before touching.

Do not plug telecommunications or telephone connectors into the network interface controller (NIC) receptacles.

Do not disable the power cord grounding plug. The grounding plug is an important safety feature.

Plug the power cord in a grounded (earthed) outlet that is easily accessible at all times.

To reduce the risk of serious injury, read the Safety & Comfort Guide. It describes proper workstation, setup, posture, and health and work habits for computer users, and provides important electrical and mechanical safety information. This guide is located on the Web at

WARNING! Energized and moving parts inside.

Disconnect power to the equipment before removing the enclosure.

Replace and secure the enclosure before re-energizing the equipment.

CAUTION: Static electricity can damage the electrical components of the computer or optional

equipment. Before beginning these procedures, ensure that you are discharged of static electricity by briefly touching a grounded metal object. See information.

When the computer is plugged into an AC power source, voltage is always applied to the system board. You must disconnect the power cord from the power source before opening the computer to prevent damage to internal components.

Electrostatic discharge on page 132 for more

http://www.hp.com/ergo.

14 Chapter 2 Tower (TWR) hardware upgrades ENWW

Removing the computer access panel

To access internal components, you must remove the access panel:

1. Remove/disengage any security devices that prohibit opening the computer.

2. Remove all removable media, such as compact discs or USB flash drives, from the computer.

3. Turn off the computer properly through the operating system, then turn off any external devices.

4. Disconnect the power cord from the power outlet and disconnect any external devices.

CAUTION: Regardless of the power-on state, voltage is always present on the system board

as long as the system is plugged into an active AC outlet. You must disconnect the power cord to avoid damage to the internal components of the computer.

5. Lift up on the access panel handle (1) then lift the access panel off the computer (2).

ENWW Removing the computer access panel 15

Replacing the computer access panel

Slide the lip on the front end of the access panel under the lip on the front of the chassis (1) then press the back end of the access panel onto the unit so that it locks into place (2).

16 Chapter 2 Tower (TWR) hardware upgrades ENWW

Removing the front bezel

1. Remove/disengage any security devices that prohibit opening the computer.

2. Remove all removable media, such as compact discs or USB flash drives, from the computer.

3. Turn off the computer properly through the operating system, then turn off any external devices.

4. Disconnect the power cord from the power outlet and disconnect any external devices.

CAUTION: Regardless of the power-on state, voltage is always present on the system board

as long as the system is plugged into an active AC outlet. You must disconnect the power cord to avoid damage to the internal components of the computer.

5. Remove the computer access panel.

6. Lift up the three tabs on the side of the bezel (1), then rotate the bezel off the chassis (2).

ENWW Removing the front bezel 17

Removing bezel blanks

On some models, there are bezel blanks covering one or more drive bays that need to be removed before installing a drive. To remove a bezel blank:

1. Remove the access panel and front bezel.

2. Remove the bezel blank for the appropriate drive:

To remove a 5.25-inch bezel blank, press inward on the retaining tabs that hold the bezel

●

blank in place (1) then pull the bezel blank from the front bezel (2).

NOTE: After removing the 5.25-inch drive bezel blank and installing a drive, you can

install an optional bezel trim piece (available from HP) that surrounds the front of the drive.

To remove a 3.5-inch bezel blank, press outward on the two retaining tabs that hold the

●

bezel blank in place (1) and rotate the bezel blank back and to the right to remove it (2).

18 Chapter 2 Tower (TWR) hardware upgrades ENWW

To remove a slim optical drive bezel blank, press inward on the retaining tabs that hold the

●

bezel blank in place (1) then pull the bezel blank from the front bezel (2).

NOTE: After removing the slim optical drive bezel blank and installing a slim optical drive,

you can install an optional bezel trim piece (available from HP) that surrounds the front of the slim optical drive.

Replacing the front bezel

Insert the three hooks on the bottom side of the bezel into the rectangular holes on the chassis (1) then rotate the top side of the bezel onto the chassis (2) and snap it into place.

ENWW Replacing the front bezel 19

System board connections

Refer to the following illustration and table to identify the system board connectors.

No. System Board Connector System Board Label Color Component

1 System Board PCI Extender

Connectors

2 SATA 3.0 SATA1 light blue Any SATA Device other than the

3 USB 2.0 MEDIA black USB 2.0 Device, such as a USB 2.0

4 SATA 3.0 SATA0 dark blue Primary Hard Drive

5 SATA 3.0 SATA2 light blue Any SATA Device other than the

6 PCI (optional) PCI1 white Expansion Card

7 System Board PCI Extender

(optional)

8 PCI Express x16 downshifted

to a x4

9 PCI Express x1 X1PCIEXP2 black Expansion Card

10 PCI Express x1 X1PCIEXP1 black Expansion Card

11 PCI Express x16 X16PCIEXP black Expansion Card

12 Parallel Port PAR black Parallel Port

13 Serial Port COMB black Serial Port

EXT black System Board PCI Extender

(not applicable) (not

applicable)

X4PCIEXP white Expansion Card

(optional, shown installed)

Primary Hard Drive

Media Card Reader

Primary Hard Drive

Expansion Card

14 Hood Lock HLCK black Hood Lock

15 Hood Sensor HSENSE white Hood Sensor

16 Battery BAT black Battery

20 Chapter 2 Tower (TWR) hardware upgrades ENWW

No. System Board Connector System Board Label Color Component

17 DIMM4 (Channel A) DIMM4 white Memory Module

18 DIMM3 (Channel A) DIMM3 black Memory Module

19 DIMM2 (Channel B) DIMM2 white Memory Module

20 DIMM1 (Channel B) DIMM1 black Memory Module

21 Power SATA PWR0 black SATA Drives

22 Power PWR white System Board

23 USB 3.0 FRONT USB3.0 blue Front USB 3.0 Ports

24 USB 3.0 MEDIA3.0 black USB 3.0 Device, such as a USB 3.0

25 SATA 3.0 SATA3 light blue Any SATA Device other than the

26 SATA 3.0 SATA5 light blue Any SATA Device other than the

Installing additional memory

The computer comes with double data rate 3 synchronous dynamic random access memory (DDR3SDRAM) dual inline memory modules (DIMMs).

Media Card Reader

Primary Hard Drive

DIMMs

The memory sockets on the system board can be populated with up to four industry-standard DIMMs. These memory sockets are populated with at least one preinstalled DIMM. To achieve the maximum memory support, you can populate the system board with up to 32-GB of memory configured in a high-performing dual channel mode.

DDR3-SDRAM DIMMs

For proper system operation, the DDR3-SDRAM DIMMs must be:

● industry-standard 240-pin

unbuffered non-ECC PC3-12800 DDR3-1600 MHz-compliant

●

1.35 volt or 1.5 volt DDR3/DDR3L-SDRAM DIMMs

●

The DDR3-SDRAM DIMMs must also:

support CAS latency 11 DDR3 1600 MHz (11-11-11 timing)

●

● contain the mandatory JEDEC SPD information

ENWW Installing additional memory 21

In addition, the computer supports:

512-Mbit, 1-Gbit, and 2-Gbit non-ECC memory technologies

●

single-sided and double-sided DIMMs

●

DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not

●

supported

NOTE: The system will not operate properly if you install unsupported DIMMs.

Populating DIMM sockets

There are four DIMM sockets on the system board, with two sockets per channel. The sockets are labeled DIMM1, DIMM2, DIMM3, and DIMM4. Sockets DIMM1 and DIMM2 operate in memory channel B. Sockets DIMM3 and DIMM4 operate in memory channel A.

The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the DIMMs are installed.

NOTE: Single channel and unbalanced dual channel memory configurations will result in inferior

graphics performance.

The system will operate in single channel mode if the DIMM sockets are populated in one

●

channel only.

The system will operate in a higher-performing dual channel mode if the total memory capacity

●

of the DIMMs in Channel A is equal to the total memory capacity of the DIMMs in Channel B. The technology and device width can vary between the channels. For example, if Channel A is populated with two 1-GB DIMMs and Channel B is populated with one 2-GB DIMM, the system will operate in dual channel mode.

The system will operate in flex mode if the total memory capacity of the DIMMs in Channel A is

●

not equal to the total memory capacity of the DIMMs in Channel B. In flex mode, the channel populated with the least amount of memory describes the total amount of memory assigned to dual channel and the remainder is assigned to single channel. For optimal speed, the channels should be balanced so that the largest amount of memory is spread between the two channels. If one channel will have more memory than the other, the larger amount should be assigned to Channel A. For example, if you are populating the sockets with one 2-GB DIMM, and three 1-GB DIMMs, Channel A should be populated with the 2-GB DIMM and one 1-GB DIMM, and Channel B should be populated with the other two 1-GB DIMMs. With this configuration, 4-GB will run as dual channel and 1-GB will run as single channel.

In any mode, the maximum operational speed is determined by the slowest DIMM in the system.

●

22 Chapter 2 Tower (TWR) hardware upgrades ENWW

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