Dell External OEMR XL R720XD - Memory; Supported Memory Technologies and DIMMs

21 PowerEdge R720 and R720xd Technical Guide
More memory options are available than ever before with the Dell™ PowerEdge™ R720 and
R720xd—greater capacities, higher frequencies, and more flexibility. The R720 and R720xd support
up to 768GB of memory (24 DIMMs) and speeds up to 1600 MT/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 (UDIMMs) and registered DIMMs (RDIMMs), the
R720 and R720xd support load reduced DIMMs (LRDIMMs), which use a buffer to reduce memory
loading and provide greater density, allowing for the maximum platform memory capacity.
Table 7 lists the memory technologies supported by the R720 and R720xd.
Feature
UDIMM
RDIMM
LRDIMM
Register
No
Yes
Yes
Buffer
No
No
Yes
Frequencies
800, 1066, 1333, or
1600MT/s
800, 1066, 1333, or
1600MT/s
1066 or 1333MT/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
ECC
Yes
Yes
Yes
SDDC
Yes (with advanced
ECC mode)
Yes
Yes
Address parity
Yes
Yes
Yes