User Manual

19 PowerEdge R620 Technical Guide
5 Memory
More memory options are available than ever before with the Dell PowerEdge R620 — greater
capacities, higher frequencies and more flexibility. The R620 supports up to 768GB of memory
(24 DIMMs) and speeds up to 1866MT/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 which 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 unbuffered DIMMs (UDIMM) and registered DIMMs (RDIMM), the
R620 supports load-reduced DIMMs (LRDIMMs), which use a buffer to reduce memory loading and
provide greater density, allowing for the maximum platform memory capacity.
Supported memory
Table 8 lists the memory technologies supported by the R620.
Table 8. Memory technologies supported
Feature
UDIMM
RDIMM
LRDIMM
Register
No
Yes
Yes
Buffer
No
No
Yes
Frequencies*
1600MT/s
1333, 1600 or 1866MT/s
1600 or 1866MT/s
Ranks supported
1
1, 2 or 4
4
Capacity per DIMM
4GB
4, 8, 16, or 32GB
32GB
Maximum DIMMs per channel
2
3
3
DRAM technology
x8
x4 or x8
x4
Temperature sensor
Yes
Yes
Yes
Error Correction Code (ECC)
Yes
Yes
Yes
Single Device Disable Code
(SDDC)
Yes (with advanced
ECC mode)
Yes
Yes
Address parity
Yes
Yes
Yes
*Although the R720 and R720xd support DIMM speeds lower than 1600MT/s, you can only purchase these systems
with DIMM speeds of 1600MT/s and 1866MT/s on Dell.com/PowerEdge.