HP Z620 Specification page 21

QuickSpecs
System Technical Specifications
NOTE: CPU0 is located on the main system board. CPU1 (optional) is located on an add-in riser card.
Maximum Memory
Memory Configuration (Supported)
PCI Express Connectors
Supports up to 192GB with two processors and (12) 16 GB DIMMs
Not all memory configurations possible are represented above.
Only ECC DIMMs are supported.
Do not install memory modules into memory slots if corresponding processor is not
installed.
Dual processor configurations with memory modules installed for only one processor is
not supported.
UDIMM (Unbuffered) and RDIMM (Registered) memory cannot be mixed. All memory
installed in the system must be either UDIMM or RDIMM.
Slot 1 (top):
PCI Express Gen2 x4(1)*
Full-height, Half-length
(not available when 2nd CPU/Memory Module is installed)
Slot 2:
PCI Express Gen3 x16
Full-height, Full-length (with extender)
Slot 3:
PCI Express Gen2 x8(4)* with open-ended connector**
Full-height, Full-length (with extender)
Slot 4:
PCI Express Gen3 x8 with open-ended connector**
DA - 14262 North America — Version 35 — December 12, 2013
HP Z620 Workstation
Page 21