Memory; Supported Memory; Table 6. Memory Technologies Supported - Dell PowerEdge M820 Technical Manual

5 Memory

More memory options are available than ever before with the Dell PowerEdge M820 — greater
capacities, higher frequencies and more flexibility. The M820 supports up to 1.5TB of memory
and speeds up to 1600MT/s, providing high performance in a variety of applications. High memory
density means there is no compromise when it comes to virtualization.
Increase your uptime and reduce data loss due to Dell's focus on reliability, availability and
serviceability (RAS) features. RAS aids in the rapid and accurate diagnosis of faults that require service,
increasing your memory reliability. System uptime is reinforced with RAS features like memory
mirroring, sparing and many others.
In addition to supporting existing RDIMM technologies, the M820 supports load reduced DIMMs
(LRDIMMs), which use a buffer to reduce memory loading and allow for greater density, allowing for
the maximum platform memory capacity.

Supported memory

Table 6 lists the memory technologies supported by the M820.
Feature
Register
Buffer
Frequencies*
Ranks supported
Capacity per DIMM
Maximum DIMMs per channel
DRAM technology
Temperature sensor
Error Correction Code (ECC)
Single Device Disable Code (SDDC)
Address parity
*Although the M820 supports DIMM speeds of 800MT/s and 1066MT/s, you can only purchase this system with
DIMM speeds of 1333MT/s and 1600MT/s on Dell.com/PowerEdge.
PowerEdge M820 Technical Guide
17
Table 6. Memory technologies supported
RDIMM
Yes
No
800, 1066, 1333 or
1600MT/s
1, 2 or 4
4, 8, 16 or 32GB
3
x4 or x8
Yes
Yes
Yes
Yes
LRDIMM
Yes
Yes
1066 or 1333MT/s
4
32GB
3
x4
Yes
Yes
Yes
Yes