26 PowerEdge R720 and R720xd Technical Guide
Table 9 illustrates the maximum achievable speed of the Intel Xeon processor E5-2600 and E5-
2600 v2 product families based on memory loads.
Green boxes are defaults for performance per watt
White boxes (with lower voltage) can save power but will run at slower speeds
White boxes (with higher voltage) can be custom configured in the bios
Table 9. Memory speed capabilities
Intel Xeon processor E5-2600 and E5-2600 v2
product families
DIMMs per channel (DPC)
Memory RAS features
Reliability, availability, and 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.
RAS aids in rapid, accurate diagnosis of faults which require service. Table 10 describes the memory
RAS features supported on the R720 and R720xd.
Table 10. Memory RAS features
Dense configuration
optimized profile
Increased memory reliability can be a result from this selectable platform profile
that adjusts parameters to reduce faults regarding refresh rates, speed,
temperature and voltage
Memory demand and
patrol scrubbing
Demand scrubbing is the ability to write corrected data back to the memory once
a correctable error is detected on a read transaction. Patrol scrubbing proactively
searches the system memory, repairing correctable errors.
Recovery from single
DRAM device failure
(SDDC)
Recovery from Single DRAM Device Failure (SDDC) provides error checking and
correction that protects against any single memory chip failure as well as multi-bit
errors from any portion of a single memory chip.
This feature provides the ability to identify a specific failing DIMM channel pair,
thereby enabling the user to replace only the failed DIMM pair.