HP Z220 SFF, Z220 CMT, Z420, Z620, and Z820 Workstations Maintenance and Service Guide

HP Z420 Workstation slot identification and description
Maximum power used by all slots must not exceed total system power and is subject to configuration
limitations.
Slot Type Mechanical compatibility Electrical compatibility
1 PCIe2 x4 (1) x4 x1
2 PCIe3 - x16 x16 x16
3 PCIe2 - x8 (4) x8 x4
4PCIe3 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 a x16 length connector, with 8 PCIe lanes supported.
Slot two is the primary graphics slot; slot five is the secondary graphics slot.
Slots one, three, and four use open-ended PCIe connectors, so a PCIe x16 card can be inserted.
Graphics cards greater than 75 watts require the use of an auxiliary power cable adapter.
Component replacement guidelines 85