Dell Precision 7920 User Manual

Rack Rails
The rail offerings consist of two types of rails — sliding and static.
The sliding rails allow the system to be fully extended out of the rack for service. They are available with or without the optional
cable management arm (CMA).
The static rails support a wider variety of racks than the sliding rails. However, they do not support serviceability in the rack and
are thus not compatible with the CMA.
One key factor in selecting the proper rails is identifying the type of rack in which they will be installed. Both the sliding rails and
the static rails support tool-less mounting in 19”wide, EIA-310-E-compliant square hole and unthreaded round hole 4-post racks.
Both also support tooled mounting in threaded hole 4-post racks, but only the static rails, as the more universal solution, support
mounting in 2-post (Telco) racks.
The table below shows the sliding and static rail configurations and supported racks:
Table 13. Sliding and Static Rails
82 Disassembly and reassembly

Dell Precision 7920 Specifications

General

Memory Slots	24 DIMM slots
Chipset	Intel C621
Processor Options	Intel Xeon Scalable Processors
Memory	Up to 3TB DDR4 ECC
Storage	SATA/SAS HDDs/SSDs
Graphics	NVIDIA Quadro or AMD Radeon Pro
Operating System	Windows 10 Pro, Ubuntu Linux, Red Hat Enterprise Linux
Power Supply	950W PSU, 90% efficient (80 Plus Gold Certified), Energy Star compliant
Network	Integrated Gigabit Ethernet, optional 10GbE
Front Ports	USB 3.1
Rear Ports	USB 3.1, USB 2.0, audio