Dell OptiPlex 755 User Manual
DELL™
optipLEx™ 755
tEchnicaL guiDE book
insiDE thE optipLEx 755
TABLE OF CONTENTS
ovErviEw 3
Mini Tower Computer (MT) View 5
Desktop Computer (DT) View 6
Small Form Factor Computer (SFF) View 7
Ultra Small Form Factor Computer (USFF) View 8
MarkEting systEM configurations
Operating System, Chipset 9
Processor 10
Advanced System Manageability Modes, Deployment Mode Options 11
Memory 12
Drives and Removable Storage 13
System Board Connectors 14
System Board Connector Maximum Allowable Dimensions,
Graphics/Video Controller 15
External Ports/Connectors 20
Communications – Network Adapter (NIC) 21
Communications – Modem 23
Audio and Speakers, Keyboard and Mouse, Security 24
Service and Support, Software 25
DEtaiLED EnginEEring spEcifications
System Dimensions (Physical) 26
System Level Environmental and Operating Conditions 27
Power 28
Audio 29
Hard Drives 30
Optical Drives 34
BIOS Defaults 38
chassis EncLosurE anD vEntiLation rEquirEMEnts 41
rEguLatory coMpLiancE anD EnvironMEntaL
Acoustic Noise Emission Information 42
DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
robust MainstrEaM
DEsktop DEsignED
to MEEt your
nEEDs, now anD
in thE futurE
The new Dell OptiPlex 755 offers a compelling, versatile solution that can help you meet evolving business needs with the right
technologies and services. Thanks to Dell’s innovative approach to scalable remote client management, the OptiPlex 755 offers
you a choice between several systems-management options. These options allow you to select an approach that’s appropriate
for your current infrastructure, while easily scaling to meet future needs. Options include:
• Widely installed ASF (Alert Standard Format) standards-based technology, which supports basic in- and out-of-band
hardware inventory, alerting, and power control
• Intel® Active Management Technology (Intel AMT), which adds encrypted communications to ASF requirements, and also
provides remote diagnosis and troubleshooting capabilities
• Intel® vPRO™ processor-based technology adds processor-specic security technologies to Intel AMT’s functionality
In addition, Dell continues to expand our Deployment Services — now featuring ImageDirect, a web-based tool that can enable you
to build and apply custom images for current and future systems. And because we know data security is a vital concern, the OptiPlex
755 offers optional RAID 1 support for real-time data-mirroring protection. Plus, those who elect for a full vPRO platform can enjoy
additional advanced security and remote remediation features.
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
aDvancED rEMotE ManagEMEnt: New capabilities that allow IT to have greater control
• Your choice of exible options — from ASF 2.0 to Intel AMT 3.0, and even full Intel vPro processor technology
• Standards-based management (DASH 1.0 and WS-MAN) help ensure simplicity and interoperability
• Dell Client Manager brings it all together in one management console
powEr EfficiEncy: Productivity and power savings in a proven, reliable design
• Dell’s Energy Smart is a unique approach to energy efcient computing which includes hardware and software, tool,
and partnerships.
• Energy Smart hardware and software includes Intel® Core™ 2 Duo processors, efcient management power settings and
remote power policy management, available 80+ power supplies and ENERGY STAR® 4.0 congurations
• Dell’s online Energy Calculator indicates potential savings of up to 78% by choosing the most efcient congurations
• Dell is working alongside industry leaders and standards organizations worldwide to help drive revolutionary change
sMart sEcurity: Strategic, comprehensive endpoint solutions for all types of businesses
• Intel vPro technology helps simplify asset inventory, isolation of virus-infected PCs, security patch deployment and more
• RAID 1 support helps keep data intact and accessible via real-time redundancy
• Built-in TPM 1.2 helps protect the network from unauthorized access, while enabling multi-factor authentication via
optional Smart Card Reader and/or ngerprint reader
DELL DEpLoyMEnt sErvicEs: Image management, customization and deployment made easy
• Specic provisioning and pre-congured setting options for iAMT and Intel vPro technology customers
• ImageDirect allows you to create, manage and load your custom images to Dell client systems
• Microsoft® Windows Vista® Assessment and Migration options help streamline and optimize your deployment processes
SIMPLY PUT:
rEMotE ManagEMEnt, sMart
sEcurity, anD custoMizED
DEpLoyMEnts hELp siMpLify
your opErations
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
Mini towEr coMputEr (Mt) viEw
1
2
3
5
9
11
10
4
6
7
8
FRONT VIEW
5.25-inch drive bay
1
5.25-inch drive bay
2
3.5-inch drive bay
3
USB 2.0 connectors (2)
4
LAN indicator light
5
diagnostic lights
6
power button
7
power light
8
hard drive activity light
9
headphone connector
10
microphone connector
11
6
5
4
7
1
3
8
2
BACK VIEW
1
2
3
4
5
6
7
8
card slots
serial port
power connector
voltage selection switch
padlock ring
cover release latch
parallel port
VGA port
1
2
22
21
20
19
18
17
14
16
26
27
28
29
30
15
4x USB 2.0 ports
1 - RJ 45 network port
2 - USB 2.0 ports
stereo in/microphone
stereo out
12
13
24
23
3
6
7
10
11
28
27
26
25
4
7
9
29
30
SYSTEM BOARD COMPONENTS
speaker connector (INT_SPKR)
1
fan (FAN_CPU)
2
processor connector (CPU)
5
8
3
processor power connector (12VPOWER)
4
memory module connectors (DIMM_1, DIMM_2, DIMM_3, DIMM_4)
5
password jumper (PSWD)
6
SATA drive connectors (SATA0, SATA1, SATA2, SATA3)
7
front-panel connector (FRONTPANEL)
8
power connector (POWER)
9
external SATA connector (eSATA)
10
internal USB (INT_USB)
11
RTC reset jumper (RTCRST)
12
intrusion switch connector (INTRUDER)
13
battery socket (BATTERY)
14
PCI Express x16 connector (SLOT1)
15
PCI Express x1 connector (SLOT4)
16
PCI connector (SLOT2)
17
PCI connector (SLOT3)
18
serial connector (SERIAL2)
19
system board speaker (BEEP)
20
aux power LED (aux_LED)
21
oppy connector (DSKT)
22
VGA connector
23
parallel port
24
serial port
25
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
DEsktop coMputEr (Dt) viEw
10
FRONT VIEW
USB 2.0 connectors (2)
1
LAN indicator light
2
power button
3
Dell badge
4
power light
5
diagnostic lights
6
1
22
21
19
18
17
16
15
11
20
14
1
3
2
8
6
7
9
13
11
12
4
5
hard drive activity light
7
headphone connector
8
microphone connector
9
3.5-inch drive bay
10
5.25-inch drive bay
11
3
2
5
6
9
10
6
8
SYSTEM BOARD COMPONENTS
4
7
1
internal speaker (INT_SPKR)
1
processor connector (CPU)
2
processor power connector (12VPOWER)
3
memory module connectors (DIMM_1, DIMM_2, DIMM_3, DIMM_4)
4
password jumper (PSWD)
5
SATA connectors (SATA0, SATA1, SATA2)
6
front-panel connector (FRONTPANEL)
7
power connector (POWER)
8
external SATA connector (eSATA)
9
internal USB (INT_USB)
10
RTC reset jumper (RTCRST)
11
intrusion switch connector (INTRUDER)
12
battery socket (BATTERY)
13
PCI Express x16 connector (SLOT1)
14
PCI connector (SLOT2)
15
PCI connector (SLOT3)
16
riser connector (uses PCI-E port/SLOT1 and PCI port/SLOT2)
17
serial connector (SERIAL2)
18
system board speaker (BEEP)
19
aux power LED (aux_LED)
20
oppy connector (DSKT)
21
fan connector (FAN_CPU)
22
7
8
2
BACK VIEW
1
2
3
4
5
6
7
8
card slots
serial port
power connector
voltage selection switch
padlock ring
cover-release latch
parallel port
VGA port
4
5
3
6
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
sMaLL forM factor coMputEr (sff) viEw
FRONT VIEW
USB 2.0 connectors (2)
1
power button
2
Dell badge
3
LAN indicator light
4
diagnostic lights
5
hard drive activity light
6
1
21
20
19
18
17
16
15
11
2
10
14
13
1
8
9
12
3
7
power light
7
headphone connector
8
microphone connector
9
3.5-inch drive bay
10
5.25-inch drive bay
11
2
5
10
9
11
4
5
6
3
4
6
6
8
SYSTEM BOARD COMPONENTS
7
1
internal speaker connector (INT_SPKR)
1
processor connector (CPU)
2
processor power connector (12VPOWER)
3
memory module connectors (DIMM_1, DIMM_2, DIMM_3, DIMM_4)
4
password jumper (PSWD)
5
SATA connectors (SATA0, SATA1)
6
front-panel connector (FRONTPANEL)
7
power connector (POWER)
8
fan connector (FAN_HDD)
9
eSATA connector (eSATA)
10
internal USB connector (INT_USB)
11
RTC reset jumper (RTCRST)
12
intrusion switch connector (INTRUDER)
13
battery socket (BATTERY)
14
PCI Express x16 connector (SLOT1)
15
PCI connector (SLOT2)
16
serial connector (SERIAL2)
17
system board speaker (BEEP)
18
aux power LED (aux_LED)
19
oppy drive connector (DSKT)
20
fan connector (FAN_CPU)
21
7
8
2
BACK VIEW
1
2
3
4
5
6
7
8
card slots
serial port
power connector
voltage selection switch
padlock ring
cover-release latch
parallel port
VGA port
4
5
3
6
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
uLtra sMaLL forM factor coMputEr (usff) viEw
2
1
9
FRONT VIEW
1
2
3
4
5
3
USB connectors (2)
headphone connector
microphone connector
power light
power button
5
4
8
7
6
7
8
9
6
vents
module bay
hard drive access light
vents
5
BACK VIEW
1
2
3
4
5
6
7
2 3
4
5
1
14
13
12
11
15
7
8
9
10
19
16
18
17
22
20
21
SYSTEM BOARD COMPONENTS
fan connector (FAN_FRONT)
1
internal speaker connector (INT_SPKR)
2
system board speaker (BEEP)
3
6
channel B memory connector (DIMM_2)
4
channel A memory connector (DIMM_1)
5
SATA data cable connector (SATA0)
6
battery (BATT)
7
password jumper (PSWD)
8
hard drive fan connector (FAN_HDD)
9
clear CMOS jumper (RTCRST)
10
hard drive power connector (SATA_PWR)
11
fan connector (FAN_REAR)
12
intrusion switch connector (INTRUDER)
13
processor (CPU)
14
DVI-1 connector
15
parallel port
16
serial port
17
1- RJ 45 network connector
18
2 - USB 2.0 connectors
19
3 - USB 2.0 ports
20
line-out connector
21
line-in microphone connector
22
2
3
1
7
4
6
diagnostic lights
computer cover release knob
parallel port
power connector
vents
serial port
DVH port
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
MarkEting systEM configurations
Oerings may vary by region. For more information regarding the configuration of your computer, click
Start Help and Support and select the option to view information about your computer.
opErating systEM
One of the following Operating Systems will be preinstalled.
MT DT SFF USFF
Windows Vista® Operating System
Windows XP® Operating System
Other
OS Media Support
chipsEt
Chipset
Non-volatile Memory on Chipset
BIOS Conguration SPI (serial peripheral interface)
TPM 1.2 Security Device (Trusted Platform Module)
NIC EEPROM
Windows Vista® Ultimate 32-bit, Windows Vista® Business 32- and 64-bit,
Windows Vista® Home Basic 32 bit
Windows® XP Professional SP2, Windows® XP Home Edition SP2
(all 32-bit only)
FreeDOS for (n-series), Red Flag Linux (China only)
✓ ✓ ✓ ✓
MT DT SFF USFF
Intel® Q35 Express Chipset (ICH9DO)
32Mbit (4MB) located at SPI_FLASH on chipset
16KB located at TPM1P2 on chipset
LOM conguration contained within SPI_FLASH – no dedicated LOM EEPROM
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
procEssor
Global Standard Products (GSP) are a subset of Dell’s relationship products that are managed for availability and synchronized
transitions on a worldwide basis. They ensure the same platform is available for purchase globally. This allows customers to reduce
the number of configurations managed on a worldwide basis, thereby reducing their costs. They also enable companies to implement
global IT standards by locking in specic product congurations worldwide. The following GSP processors identied below will be made
available to Dell customers.
Processor numbers are not a measure of performance.
PROCESSOR (SPEED, CACHE, FSB)
Intel® Core™ 2 Quad with Intel VT, Enhanced Intel SpeedStep Technology, Intel 64 and Execute Disable Bit
Intel Core 2 Quad Q6700 Processor (2.66GHz, 8MB L2 cache, 1066MHz FSB, VT)
Intel Core 2 Quad Q6600 Processor (2.4GHz, 8MB L2 cache, 1066MHz FSB, VT)
Intel® Core 2 Duo with Intel vPro Technology, Intel VT, Intel TXT, Enhanced Intel SpeedStep Technology, Intel 64 and Execute Disable Bit
Intel Core 2 Duo E6850 Processor (3.0GHz, 4MB L2 cache, 1333MHz FSB, vPro, VT)
Intel Core 2 Duo E6750 Processor (2.66GHz, 4MB L2 cache, 1333MHz FSB, vPro, VT)
Intel Core 2 Duo E6550 Processor (2.33GHz, 4MB L2 cache, 1333MHz FSB, vPro, VT)
Intel® Core 2 Duo with Enhanced Intel SpeedStep Technology, Intel 6.4 and Execute Disable Bit
Intel Core 2 Duo E4600 Processor (2.4GHz, 2MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E4500 Processor (2.2GHz, 2MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E4400 Processor (2.0GHz, 2MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E2180 Processor (2.0GHz, 1MB L2 cache, 800MHz FSB)
Intel Core 2 Duo E2160 Processor (1.8GHz, 1MB L2 cache, 800MHz FSB)
MT DT SFF USFF
✓ ✓ ✓
✓ ✓ ✓
X-GSP X-GSP X-GSP X-GSP
X-GSP X-GSP X-GSP X-GSP
X-GSP X-GSP X-GSP X-GSP
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
Intel Core 2 Duo E2140 Processor (1.6GHz, 1MB L2 cache, 800MHz FSB)
Intel® Celeron with Execute Disable Bit
Intel Celeron 440 Processor (2.0GHz, 512K L2 cache, 800MHz FSB)
Intel Celeron 430 Processor (2.0GHz, 512K L2 cache, 800MHz FSB)
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✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
aDvancED systEM ManagEabiLity MoDEs
MT DT SFF USFF
Secure Advanced Client Systems Management1
(w/ vPro)
Advanced Client Systems Management
(w/ iAMT)
Basic Client Systems Management (w/ ASF)
Client Systems Management Disabled
1
Secure Advanced Client Systems Management requires Intel Core 2 Duo or Core 2 Quad Processors in addition to iAMT.
DEpLoyMEnt MoDE options
Requires Secure Advanced Client Systems Management (with/vPro) or Advanced Client Systems Management (with iAMT) modes only.
Deployment options to enable easy deployment of systems management options.
One-Touch Provisioning Support
TLS Encryption Disabled
Legacy ASF Setting for iAMT
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
MT DT SFF USFF
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
MEMory
Your computer supports a maximum of 8GB of memory when you use four 2GB DIMMs; however, 32-bit operating systems, such as the
32-bit version of Microsoft® Windows® XP, can only use a maximum of 4GB of address space. Moreover, certain components within the
computer require address space in the 4GB range. Any address space reserved for these components cannot be used by computer
memory; therefore, the amount of memory available to the operating system is less than 4GB.
The entire 8GB memory range is available to 64-bit operating systems.
Memory modules should be installed in pairs of matched memory size, speed, and technology. If the memory modules are not installed
in matched pairs, the computer will continue to operate, but with a slight reduction in performance.
MT DT SFF USFF
DDR2 Synch DRAM Non-ECC Memory 667MHz or 800MHz speeds
DIMM Slots
DIMM Capacities
Minimum Memory
Maximum Memory with 667MHz Speed Memory
Maximum Memory with 800MHz Speed Memory
Configurations:
800MHz Memory Configurations
4GB1 DDR2 Non-ECC SDRAM, 800MHz,
(2 DIMM)
4GB1 DDR2 Non-ECC SDRAM, 800MHz,
(4 DIMM)
2GB DDR2 Non-ECC SDRAM, 800MHz,
(1DIMM)
2GB DDR2 Non-ECC SDRAM, 800MHz,
(2 DIMM)
1GB DDR2 Non-ECC SDRAM, 800MHz,
(1 DIMM)
667MHz Memory Configurations
4GB1 DDR2 Non-ECC SDRAM, 667MHz,
(4 DIMM)
4GB1 DDR2 Non-ECC SDRAM, 667MHz,
(2 DIMM)
3GB DDR2 Non-ECC SDRAM, 667MHz,
(4 DIMM)
2GB DDR2 Non-ECC SDRAM, 667MHz,
(4 DIMM)
2GB DDR2 Non-ECC SDRAM, 667MHz,
(2 DIMM)
1GB DDR2 Non-ECC SDRAM, 667MHz,
(2 DIMM)
1GB DDR2 Non-ECC SDRAM, 667MHz,
(1 DIMM)
512MB DDR2 Non-ECC SDRAM, 667MHz,
(1 DIMM)
1
The total amount of available memory will be less, depending on actual system configuration.
4 4 4 2
Up to 2GB Up to 2GB Up to 2GB Up to 2GB
512MB 512MB 512MB 512MB
1
8GB
1
8GB
✓ ✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
8GB
8GB
1
1
8GB
8GB
1
1
4GB
4GB
1
1
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
DrivEs anD rEMovabLE storagE
Bays:
MT DT SFF USFF
3.5-inch bay Externally Accessible
3.5-inch bay Internally Accessible
5.25-inch bay
Hard Drives Supported
1
Optical Drives Supported
Interface:
SATA (number of connectors - includes one dedicated
eSATA on MT, DT & SFF)
Floppy/Diskette
eSATA (requires additional bracket)
Hard Drive: Size, type, speed, RPM
80GB2 SATA 10K RPM HDD
250GB2 SATA 7200 RPM HDD
160GB2 High Reliability SATA 7200 RPM HDD
160GB2 SATA 7200 RPM HDD
80GB2 SATA 7200 RPM HDD
RAID 0 Enhanced Performance:
(includes two matching capacity/speed hard drives)
80GB2 SATA 10K RPM HDD
160GB2 SATA 7200 RPM HDD
320B2 SATA 7200 RPM HDD
500GB2 SATA 7200 RPM HDD
RAID 1 Data Protection:
(includes two matching capacity/speed hard drives)
80GB2 SATA 10K RPM HDD
1 1* 1 (slimline) D/bay module
2 1* 1 1
2 1 1 (slimline)
2 2 1 1
2 1 1 D/bay module
5 4 3 1
1 1 1
1 1 1
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓ ✓ ✓
✓ ✓
✓ ✓
✓ ✓
✓ ✓
3
3
3
3
✓ ✓
250GB2 SATA 7200 RPM HDD
160GB2 SATA 7200 RPM HDD
80GB2 SATA 7200 RPM HDD
1
This only pertains to drives physically contained within the chassis and does not refer to HDDs attached via eSATA (including port multiplier), USB or optional 1394.
2
For hard drives, GB means 1 billion bytes and TB equals 1 trillion bytes; actual capacity varies with preloaded material and operating environment and will be less.
3
RAID 1 in DT chassis restricted to Western Digital and Samsung HDDs.
* Card length can be longer than standard Half-Length Card but cannot be a Full-Length Card.
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✓ ✓
✓ ✓
✓ ✓
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DELL™ OPTIPLEX™ 755 TECHNICAL GUIDE
DrivEs anD rEMovabLE storagE, cont.
MT DT SFF USFF
Optical Drive:
DVD+/-RW
DVD-ROM
Combo Drive CD-RW
CD-ROM
16x SATA 8x EIDE 8x EIDE
16x SATA 8x EIDE 8x EIDE
48x/32x/48x/16x SATA 24x/24x/24x EIDE 24x/24x/24x EIDE
48x SATA 24x EIDE 24x EIDE
Floppy Diskette Drive:
Floppy Drive
1.44MB 1.44MB (slimline) 1.44MB (D/Bay)
Media Card Reader: (uses Externally Accessible 3.5-inch bay)
Dell 19-in-1 Media Card Reader
✓ ✓ ✓
systEM boarD connEctors
See Detailed Engineering Specications for maximum card dimensions support.
SFF requires
a slimline
optical drive
USFF requires
a D-module
Slimline drive
PCI Slot(s):
PCIe x16 Slot:
PCIe x1 Slot:
Flexbay (used for Media Card Reader)
Serial ATA (SATA) (Includes eSATA Connector)
MT DT SFF USFF
2 2 1
1 1 1
1
1 1 1
5 4 3 1
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