HP Z440, Z640, and Z840 Workstation Series - Maintenance and Service Guide

HP Z640 Workstation slot identication and description

Maximum power used by all slots must not exceed total system power and is subject to conguration

limitations.

NOTE: Slot 1 is not available in dual processor congurations.

Slot Type Mechanical compatibility Electrical compatibility

1 PCIe2 x4 (1) x4 x1

2 PCIe3 x16 x16 x16

3 PCIe2 x8 (4) x8 x4

4 PCIe3 x8 x8 x8

5 PCIe3 x16 x16 x16

6 PCI 32/33 PCI PCI

NOTE: The PCIe designators indicate the mechanical connector size and number of electrical PCIe lanes

routed to an expansion slot. For example, x16 (8) means that the expansion slot is mechanically an x16

length connector, with 8 PCIe lanes supported.

NOTE: Slots two, four, and ve are PCIe GEN3 slots. Slot two is the primary graphics slot; slot ve is the

secondary graphics slot.

Slots three and four use open-ended PCIe connectors, so a PCIe x16 card can be 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. Graphics cards greater than 75 watts require the use of an auxiliary power cable

adapter.

HP Z640 Workstation installation sequence recommendations

Load

order

Card description Slot 1 Slot 2 Slot 3 Slot 4 Slot 5 Slot 6

Second System Board

(Riser)

Only

2 First PCIe graphic card Only

54 Chapter 3 Component replacement information and guidelines