Table 28. 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 29. 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 30. 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
112
BIOS and UEFI