Table 34. DIMMs supported (continued)
DIMM
Capacity(GB)
DIMM Speed DIMM Type Ranks per
DIMM
Data Width SDDC Support DIMM Voltage
32 2666MT/s RDIMM 2 x4 All Modes 1.2
64 2666MT/s LRDIMM 4 x4 All Modes 1.2
Memory Speed
The Precision 7920 Rack supports memory speeds of 2666 MT/s, 2400 MT/s, and 2133 MT/s depending on the DIMM types
installed and the configuration. All memory on all processors and channels run at the same speed and voltage. By default, this
speed will be the highest speed supported by the CPU and the DIMMs. The operating speed of the DIMMs is also determined
by the maximum speed supported by the processor, speed settings in the BIOS and the operating voltage of the system. Not all
processors support 2666MT/s memory speed.
The table below lists the memory configuration and performance details for the Precision 7920 Rack, based on the quantity and
type of DIMMs per memory channel.
Table 35. DIMM Performance Details
DIMM Type DIMM Ranking Capacity DIMM Rated Voltage,
Speed
1 DPC 2 DPC
RDIMM 1R/2R 8GB, 16GB,
32GB
DDR4 (1.2V)
i: 2666
D:2666
i: 2400
D:2666
LRDIM 4R 64GB DDR4 (1.2V)
i: 2666
D:2666
i: 2400
D:2666
LCD panel
The LCD panel provides system information, status, and error messages to indicate if the system is functioning correctly or
requires attention. The LCD panel can also be used to configure or view the system’s iDRAC IP address. For information about
the event and error messages generated by the system firmware and agents that monitor system components, see the Error
Code Lookup page at qrl.dell.com.
The LCD panel is available only on the optional front bezel. The optional front bezel is hot pluggable.
The statuses and conditions of the LCD panel are outlined here:
● The LCD backlight is white during normal operating conditions.
● When the system needs attention, the LCD backlight turns amber, and displays an error code followed by descriptive text.
NOTE:
If the system is connected to a power source and an error is detected, the LCD turns amber regardless of
whether the system is turned on or off.
● When the system turns off and there are no errors, LCD enters the standby mode after five minutes of inactivity. Press any
button on the LCD to turn it on.
● If the LCD panel stops responding, remove the bezel and reinstall it.
If the problem persists, see Getting help section.
● The LCD backlight remains off if LCD messaging is turned off using the iDRAC utility, the LCD panel, or other tools.
Figure 34. LCD panel features
Technology and components
111
To Next Page
Loading...
