Psu Specifications; System Battery Specifications; Expansion Bus Specifications; Memory Specifications - Dell Precision 7920 Owner's Manual

PSU specifications

The Precision 7920 Rack system supports up to two AC power supply units (PSUs).
Table 29. PSU specifications
PSU Class
1100 W AC Platinum
1600 W AC Platinum
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
NOTE:
V.
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
NOTE:
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 PCIe slots on
card riser the riser
Riser 1C Slot 1
Slot 2
Slot 3
Riser 2A Slot 4
Slot 5
Slot 6
Riser 3A Slot 7
Slot 8

Memory specifications

Table 31. Memory specifications
Memory Architecture
module
sockets
Twenty 2666 MT/s, DDR4
four 288- RDIMMs, LRDIMMs,
pins with support for
advanced ECC or
126 BIOS and UEFI
Heat dissipation
(maximum)
4100 BTU/hr
6000 BTU/hr
Height Length
Full Height Full Length
Full Height Full Length
Full Height Half Length
Full Height Full Length
Full Height Full Length
Low Profile Half Length
Full Height Full Length
Full Height Full Length
Memory capacity
64 GB quad rank
(LRDIMMs)
Frequency Voltage
50/60 Hz 100–240 V AC, autoranging
50/60 Hz 100–240 V AC, autoranging
Link
x16
x8
x8
x16
x8
x8
x8
x16
Minimum RAM
64 GB with single processor
Current
12 A–6.5 A
10 A
CPU
CPU1
CPU1
CPU1
CPU2
CPU2
CPU1
CPU2
CPU2
Maximum RAM
LRDIMM: up to 768 GB
with single processor and
1536 with dual processors