Specifications

18 PowerEdge M420 Technical Guide
5 Memory
More memory options are available than ever before with the Dell PowerEdge M420 — greater
capacities, higher frequencies and more flexibility. The M420 supports up to 192GB of memory
using up to six DIMMs in a dual-processor configuration, 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.
The M420 supports unbuffered DIMM (UDIMM) and registered DIMM (RDIMM) technology.
Supported memory
Table 6 lists the memory technologies supported by the M420.
Table 6. Memory technologies supported
Feature
UDIMM
RDIMM
Register
No
Yes
Buffer
No
No
Frequencies*
800, 1066, 1333 or
1600MT/s
800, 1066, 1333 or
1600MT/s
Ranks supported
2
1, 2, or 4
Capacity per DIMM
4GB
2, 4, 8, 16 or 32GB
Maximum DIMMs per channel
1
1
DRAM technology
x8
x4 or x8
Temperature sensor
Yes
Yes
Error Correction Code (ECC)
Yes
Yes
Single Device Disable Code (SDDC)
Yes (with advanced ECC
mode)
Yes
Address parity
Yes
Yes
*Although the M420 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.