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NOTE: The x1, x4, x8, and x16 designators describe the number of electrical PCIe lanes routed to an
expansion slot. For example, x16(8) means that the expansion slot is mechanically a x16 length
connector, with eight PCIe lanes connected.
Slots one and three use open-ended PCIe connectors, so a PCIe x16 card can inserted. This allows the
workstation to support more PCIe x16 expansion cards. A x16 card typically trains and runs at the
maximum lane width available by the expansion slot. The card runs at the reduced lane width, with a
corresponding performance decrease.
A x16 graphics card runs at the bandwidth of the slot it is plugged into. The slot bandwidth can be x1,
x4, x8, or x16. A PCIe card can be plugged into a slot with a lesser speed. It runs at that speed with a
commensurate performance decrease. (Older graphics cards may not comply with this.)
NOTE: A eighth slot opening in the chassis has no corresponding expansion connector on the System
board. This slot opening is provided for devices that require no system board card plug in capability.
This slot can be used for cable or connector output. The cables plug into the system board.
Expansion card configuration restrictions for power supplies
CAUTION: To prevent damage, the overall power consumption of the workstation (including I/O cards,
CPU, and memory) must not exceed the maximum rating of the workstation power supply. For power
supply information, see
Power supply specificationson page 11.
The maximum graphics card configuration is:
Power supply Graphics card maximum
850W 75W
One in slot #2
AND
One in slot #5
150W
1
One in slot #2
AND
One in slot #5
175W
One in slot #2
OR
One in slot #5
1110W 75W
One in slot #2
AND
One in slot #5
150W
1
One in slot #2
AND
One in slot #5
175W
One in slot #2
AND
One in slot #5
225W
*
One in slot #2
AND
One in slot #5
*
Requires memory and CPU configuration restrictions.
1
Applies if other configuration constraints allow. Workstation memory < 24GB is a common denominator. (See the Site
preparation guide for the HP 800 Workstation at http://hp.com/support/workstation_manuals for further power consumption
information.)
Graphics cards greater than 75 watts require the use of an auxiliary power cable adapter.
If a graphics card greater than 75 watts is used, HP recommends that you leave the adjacent slot empty,
and follow any additional workstation configuration restrictions. You can also use a lower power or lower
profile card between slots for optimum cooling.
The maximum graphics configuration with a 1110W power supply can include up to two 225-watt cards
in slots two and five, depending on system configuration.
ENWW Removing and installing components 145