Dell OptiPlex 990 - Memory Module Service; Removing the Memory

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.5
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DETAILED ENGINEERING SPECIFICATIONS
SYSTEM DIMENSIONS (PHYSICAL)
NOTE: System Weight and Shipping Weight is based on a typical configuration and may vary based on PC configuration. A typical configuration
includes: integrated graphics, one hard drive, one optical drive.
SYSTEM EXPANSION SLOTS
* Card length can be longer than standard Half-Length Card but cannot be a Full-Length Card.
MT DT SFF USFF
Chassis Volume (liters) 26.27 15.06 8.38 3.70
Chassis Weight (pounds/kilograms)
19.55 / 8.87 16.67 / 7.56 12.57 / 5.70 7.20 / 3.265
Chassis Dimensions: (HxWxD)
Height (inches/centimeters) 14.17 / 36 14.17 / 36 11.42 / 29 9.32 / 23.67
Width (inches/centimeters)
6.89 / 17.5 4.02 / 10.2 3.65 / 9.26 2.56 / 6.5
Depth (inches/centimeters)
16.42 / 41.7 16.14 / 41 12.28/31.2 9.44 / 24
Shipping Weight (pounds/kilograms - includes packaging materials)
23.45 / 10.64 20.03 / 9.09 15.2 / 6.89 9.56/ 4.34
Height (inches/centimeters)
21.31/54.13 21.31 / 54.13 19.25/48.90 19.13/48.59
Width (inches/centimeters)
18.75/47.63 18.75/47.63 15.81/40.16 14.38/36.53
Depth (inches/centimeters)
14.09 / 35.79 10.84/27.53 10.19/25.88 9.63/24.46
Packaging Parameters (HxWxD)
MT DT SFF USFF
PCI Slot (Voltage supported 3.3V/5V/12V/-12V) 1 1
Height (inches/centimeters) 4.376 / 11.115 2.731 /6.89
Length (inches/centimeters) 6.6 / 16.765 6.6/16.765
PCIex16 Slot (BLUE) (Voltage supported 3.3V/12V) 1 1 1
Height (inches/centimeters) 4.376 / 11.115 2.731 /6.89 2.731 /6.89
Length (inches/centimeters) 6.6 / 16.765 6.6 /16.765 6.6/16.765
PCIe x1 Slot (Voltage supported 3.3V/12V) 1 1
Height (inches/centimeters) 4.376 / 11.115 2.731 / 6.89
Length (inches/centimeters) 4.5 / 11.44 4.5 / 11.44
PCIex16 wired as x4 Slot (BLACK) (Voltage supported 3.3/12V) 1 1 1
Mini PCIe x1 Slot
1
Length (inches/centimeters) 6.6/ 16.765 6.6 /16.765 6.6 /16.765
Height (inches/centimeters) 4.376 / 11.115 2.731 /6.89 2.731 /6.89
Maximum Wattage 25W 25W
Maximum Wattage 75W 35W 35W
Maximum Wattage 25W 25W 25W
Maximum Wattage 10W 10W