HP ProLiant AMD-based 300-series G7 servers

There are three types of standard voltage DDR3 available for ProLiant 300 series G7 servers:

• PC3-8500R- DDR3 (RDIMM, ECC compliant)—1333 or 1066 MT/s data rate depending on

memory configuration.

• PC3-10600R DDR3 (RDIMM, ECC compliant)—1333 or 1066 MT/s data rate depending on

memory configuration.

• PC3-10600E DDR3 (UDIMM, ECC compliant)—1333 MT/s data rate

Low-voltage DDR3

Customers ca

n take advantage of the HP low voltage (LV) DDR3 memory option. LV memory can

operate at 1.35 V, reducing power and cooling requirements. Some LV DIMM configurations can

affect performance. The difference occurs in 2 DIMM per channel (DPC) configurations with dual-rank

DIMMs. In these configurations, the memory bus runs at 1.5 V with 2 DPC at 1333 MT/s, or 1.35 V

with 2 DPC at 1066 MT/s. This results in a 20% reduction in bandwidth for the lower voltage. In all

other HP LV configurations, the LV data rate is the standard 1.5V data rate. The BIOS determines the

operating voltage and data rate capability from the DIMMs and the DIMM population from the

system. The BIOS then sets the data rate based on that information.

NOTE:

Although the bandwidth reduction from DDR3-1333 to DDR3-1066 is 20%, the

measured reduction in throughput is 10%

Single rank DIMMs configured at 1, 2, and 3 DPC; and dual rank DIMMs configured at 1 and 3 DPC

run at the 1333 MT/s data rate at both voltages.

ProLiant G7 server models with the AMD 6100-Series processor support LV memory:

• PC3L-10600R—1333 1066 or 800 MT/s data rate, depending on memory configuration.

DIMM configuration guidelines

ProLiant A

MD-based 300-series G7 servers support 3 DIMMs per channel up to 24 DDR3 memory

DIMMs. DDR3 DIMM speeds will vary depending on number of DIMMs per channel. Consult the

server QuickSpecs to determine DIMM speeds for given configurations. Administrators can configure

Opteron-based ProLiant 300-series G7 servers using either RDIMMs or UDIMMs, but RDIMM and

UDIMM memory cannot be mixed within a single server. Low voltage DIMMs can provide up to 10%

DIMM power savings. Low and standard voltage DIMMs are compatible; systems automatically adjust

voltage based on DIMMs installed.

NOTE:

DDR3 DIMM speeds will vary depending on number of DIMMs per channel. Consult

the server QuickSpec to determine DIMM speeds for given configurations.

For detailed memory configuration rules and guidelines, please use the Online DDR3 Memory

Configuration Tool at www.hp.com/go/ddr3memory-

configurator.

Memory management technologies

Memory interleaving on the AMD Opteron 6100-series processors can occur between the processor

memory banks, memory channels, and between processor nodes in a multiprocessor system. ProLiant