PSU specifications
The Precision 7920 Rack system supports up to two AC power supply units (PSUs).
Table 29. PSU specifications
PSU Class Heat dissipation
(maximum)
Frequency Voltage Current
1100 W AC Platinum 4100 BTU/hr 50/60 Hz 100–240 V AC, autoranging 12 A–6.5 A
1600 W AC Platinum 6000 BTU/hr 50/60 Hz 100–240 V AC, autoranging 10 A
NOTE: Heat dissipation is calculated using the PSU wattage rating.
NOTE: This system is also designed to connect to the IT power systems with a phase to phase voltage not exceeding 230
V.
NOTE: If a system with 1600 W AC PSU operates at low line 100–120 V AC, then the power rating per PSU is derated to
800 W.
System battery specifications
The Precision 7920 Rack system supports CR 2032 3.0-V lithium coin cell system battery.
Expansion bus specifications
The Precision 7920 Rack system supports up to eight PCI express (PCIe) generation 3 expansion cards, that can be installed on
the system board using expansion card risers. The following table provides detailed information about the expansion card riser
specifications:
Table 30. Expansion card riser configurations
Expansion
card riser
PCIe slots on
the riser
Height Length Link CPU
Riser 1C Slot 1 Full Height Full Length x16 CPU1
Slot 2 Full Height Full Length x8 CPU1
Slot 3 Full Height Half Length x8 CPU1
Riser 2A Slot 4 Full Height Full Length x16 CPU2
Slot 5 Full Height Full Length x8 CPU2
Slot 6 Low Profile Half Length x8 CPU1
Riser 3A Slot 7 Full Height Full Length x8 CPU2
Slot 8 Full Height Full Length x16 CPU2
Memory specifications
Table 31. Memory specifications
Memory
module
sockets
Architecture Memory capacity Minimum RAM Maximum RAM
Twenty
four 288-
pins
2666 MT/s, DDR4
RDIMMs, LRDIMMs,
with support for
advanced ECC or
64 GB quad rank
(LRDIMMs)
64 GB with single processor LRDIMM: up to 768 GB
with single processor and
1536 with dual processors
126 BIOS and UEFI
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