*NOTE* These specs are for the Dell Optiplex 755 Mini Tower Computer in general. The system in this ad is configured according to the features listed in the "Description" of the ad. System Upgrades are available.
- Microprocessor
Microprocessor type:
The following are supported:
Intel Core 2
Intel vPro
Intel Celeron
Internal cache:
L1: up to 128 KB
L2: up to 8 MB (depending on your processor)
- Memory
Type: 667-MHz or 800-MHz DDR2 SDRAM
Memory connectors: 4
Memory modules supported: 512-MB, 1-GB, or 2-GB non-ECC
Minimum memory:
dual-channel: 1 GB
single-channel: 512 MB
NOTE: 512 MB is the minimum shipping configuration.
Maximum memory:
64-bit operating system: 8 GB
32-bit operating system: 4 GB
BIOS address: F0000h
- Computer Information
Chipset: Intel Q35 Express Chipset w/ICH9DO
Data bus width: 64 bits
Address bus width: 32 bits
DMA channels: eight
Interrupt levels: 24
BIOS chip (NVRAM): 32 Mb
NIC:
integrated network interface with ASF 1.03 and 2.0 support as defined by DMTF
Capable of 10/100/1000 communication
iAMT 3.0
- Video
Types:
Intel Graphics Media Accelerator 3100
DVI add-in card in PCI Express x16 slot
PCI Express x16 graphics card
- Audio
Type: ADI 1984 High Definition Audio
Stereo conversion: 24-bit analog-to-digital; 24-bit digital-to-analog
- Controllers
Drives:
four SATA controllers
one eSATA controller supporting one device each
- Expansion Bus
Bus type:
PCI 2.3
PCI Express 1.0A
SATA 1.0A and 2.0
USB 2.0
Bus speed:
PCI: 133 MB/s
PCI Express x16: 8 GB/s bidirectional speed
PCI Express x1: 5 Gbps
SATA: 1.5 Gbps and 3.0 Gbps
USB: 480 Mbps
Cards (full-height cards supported):
PCI:
connectors - two
connector size - two 164 pin connectors
connector data width (maximum) - 32 bits
PCI Express:
connectors:
one x1
one x16
power:
10 W (x1)
75 W (x16) maximum
connector size:
36 pins (x1)
164 pins (x16)
connector data width (maximum):
one PCI Express lane (x1)
16 PCI Express lanes (x16)
- Drives
Internally accessible:
Two SATA (Serial ATA) hard drives
One3.5-inch floppy drive or media reader
Two SATA optical drives
Externally accessible: One eSATA drive (optional)
- Connectors
External connectors:
Serial: 9-pin connector; 16550C-compatible
Parallel: 25-hole connector (bidirectional)
Video: 15-hole VGA connector
Network adapter: RJ45 connector
Optional PS/2 with secondary serial port adapter: two 6-pin mini-DINs
USB: two front-panel and six back panel USB 2.0compliant connectors
Audio: two connectors for line-in/ microphone and line-out; two front-panel connectors for headphones and microphone
System board connectors:
SATA: four 7-pin connectors
eSATA: one 7-pin connector
Floppy drive: 34-pin connector
Serial: 12-pin connector for optional second PS/2 serial port card
Fan: 5-pin connector
PCI 2.2: three 120-pin connectors
PCI Express: one 120-pin (x16) connector
Front panel: 40-pin connector
- Key Combinations
ctrl-alt-del: in Microsoft Windows XP, brings up the Windows Security window; in DOS mode, restarts (reboots) the computer
f2 or ctrl-alt-enter: starts embedded system setup (during system start-up only)
F3: automatically starts the computer from the network environment specified by the remote boot environment (PXE) rather than from one of the devices in the system setup Boot Sequence option (during start-up only)
f12 or ctrl-alt-f8: displays a boot device menu that allows the user to enter a device for a single boot (during system start-up only) as well as options to run hard-drive and system diagnostics
Ctrl-p: displays the Management Engine BIOS Extension settings screen that allows you to modify the settings
- Controls and Lights
Power control: push button
Power light:
green light:
Blinking green indicates a sleep mode
solid green indicates a power-on state
amber light:
Blinking amber indicates a problem with an installed device
solid amber indicates an internal power problem.
Hard-drive access light: green
Link light: solid green light indicates network connection
Link integrity light (on integrated network adapter):
green light for 10-Mb operation
orange light for 100-Mb operation
Activity light (on integrated network adapter): yellow blinking light
Diagnostic lights: four lights on the front panel
Standby power light: AUX_PWR on the system board
- Power
DC power supply:
NOTE: Power consumption from an AC power source can be zero when the computer is unplugged from that power source. However, the computer draws a minute amount of power from the internal coin cell battery even when the computer is not drawing power from the AC power source.
Wattage: 220 W
Heat dissipation: 751 BTU/hr (NOTE: Heat dissipation is calculated based upon the power supply wattage rating.)
Voltage: manual selection power supplies90 to 135 V at 60 Hz; 180 to 265 V at 50 Hz
Backup battery: 3-V CR2032 lithium coin cell
- Physical
Height : 16.3 inches
Width: 7.3 inches
Depth: 17.3 inches
Weight: 27.2 lb
- Environmental
Temperature:
Operating: 50 to 95F
Storage: 40 to 149F
Relative humidity: 20% to 80% (noncondensing)
Maximum vibration:
Operating: 0.25 G at 3 to 200 Hz at 0.5 octave/min
Storage: 0.5 G at 3 to 200 Hz at 1 octave/min
Maximum shock:
Operating: bottom half-sine pulse with a change in velocity of 20 inches/sec
Storage: 27-G faired square wave with a velocity change of 200 inches/sec
Altitude:
Operating: 50 to 10,000 ft
Storage: 50 to 35,000 ft
Airborne contaminant level: G2 or lower as defined by ISA-S71.04-1985
Optiplex 755 
