Page 22 - Dell PowerEdge R620 Technical Guide

The R620 supports memory speeds of 1600MT/s, 1333MT/s, 1066MT/s, and 800MT/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, the systems run at the highest speed for the channel with
the lowest DIMM voltage and speed. The operating speed of the memory is also determined by the
maximum speed supported by the processor, the speed settings in the BIOS, and the operating
voltage of the system.

Table 10 lists memory configuration and performance details for the R620 based on the population
of the number and type of DIMMs per memory channel.

Number Speed (MT/s)
DIMM DIMM 0 DIMM 1 DIMM 2 of
type 800 1066 1333 1600
DIMMs
SR 1 ∞ ∞ ∞

DR 1 ∞ ∞ ∞

UDIMM SR SR 2 ∞ ∞ ∞

SR DR 2 ∞ ∞ ∞

DR DR 2 ∞ ∞ ∞

SR 1 ∞ ∞ ∞ ∞

DR 1 ∞ ∞ ∞ ∞

QR 1 ∞ ∞ ∞

SR SR 2 ∞ ∞ ∞ ∞

SR DR 2 ∞ ∞ ∞ ∞

DR DR 2 ∞ ∞ ∞ ∞

RDIMM QR SR 2 ∞
QR DR 2 ∞

QR QR 2 ∞ ∞

SR SR SR 3 ∞ ∞ ∞

SR SR DR 3 ∞ ∞ ∞

SR DR DR 3 ∞ ∞ ∞

DR DR DR 3 ∞ ∞ ∞

QR 1 ∞ ∞
LRDIMM
QR QR 2 ∞ ∞

*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.

Reliability, availability, serviceability (RAS) features help keep the system online and operational
without significant impact to performance, and can decrease data loss and crashing due to errors.