Page 20 - Dell PowerEdge R620 Technical Guide

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 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 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.

Table 8 lists the memory technologies supported by the R620.

Feature UDIMM RDIMM LRDIMM

Register No Yes Yes

Buffer No No Yes

800, 1066, or 800, 1066, 1333, or
Frequencies* 1066 or 1333MT/s
1333MT/s 1600MT/s

Ranks supported 1 or 2 1, 2, or 4 4

Capacity per DIMM 2 or 4GB 2, 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 Yes (with advanced Yes Yes
(SDDC) ECC mode)

Address parity Yes Yes Yes

*Although the R620 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.