HP Z800 Specifications Page 178

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Table 5-6 Expansion card slot description and compatibility
(continued)
Slot Type Mechanical
compatibility
Electrical
compatibility
Slot power
(Maximum)
7 PCIe2 x16(8) x1, x4, x8, x16 x1, x4, x8 25W
1
PCIe GEN2 slot.
3
Primary graphics slot
4
Secondary graphics slot
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 specifications on page 12.
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 Z800 Workstation at
http://hp.com/support/workstation_manuals for further power
consumption information.)
166 Chapter 5 Replacing components ENWW
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