HP ML150 HP ProLiant Intel-based 100-series G6 server technology - Page 9

• RDIMM configurations can provide larger memory capacity configuration because the memory controller only drives the address and command signals to a single register chip, thereby reducing the electrical load on the memory controller. Users requiring large memory footprints can install three 8-GB RDIMMs per channel for a total of 144 GB. • For smaller memory configurations, installing only one or two DIMMs per memory channel can potentially increase memory performance. In many instances this allows administrators to clock the memory channel at a higher data rate. Processor SKU determines the ability of ProLiant G6 servers to run DDR-3 memory at a top speed of 1333 MT/s. The processor SKU also dictates the range of speeds possible in different DIMM per channel (DPC) configurations. DIMM operating speeds are also subject to memory slot configuration and to the number of slots (4, 6, 12, 16, or 18). Table 2 displays DIMM speeds possible in 100series G6 servers with a Xeon X5500 (95W), W5500 (130W), or 3400 (95W) processor. Table 2. DDR-3 memory options on 100-series G6 servers supporting Xeon 5500 or 3400 Series processors running at 95W or 130W DIMM Type Capacity (GB) PC3-8500R RDIMM 4 Rank quad 1 DPC Max. data rate in MT/s DIMMs per channel (DPC) 2 DPC in 4 slots 2 DPC in 6 slots 3 DPC in 6 slots 2 DPC in 16** and 18 slots 2 DPC in 12 slots 3 DPC in 16** and 18 slots 1066 N/A 1066 N/A 800 800 N/A PC3-8500R RDIMM 8 dual 1066 N/A N/A N/A 1066 1066 800 PC310600R RDIMM 2 dual 1333 1333 1333 800 1333 1333 800 PC310600R RDIMM 4 dual 1333 1333 1333 800 1333 1333 800 PC310600R RDIMM 8 dual 1333 N/A N/A N/A 1333 1333 800 PC310600E UDIMM 1 single 1333 1333 1333 N/A 1066 1333* N/A PC310600E UDIMM 2 dual 1333 1333 1333 N/A 1066 1333* N/A * UDIMMs will not run at 1333 MT/s data rates with two DIMMs per channel on systems that support three DIMM sockets per channel. Support for 1333 MT/s data rate with two DIMMs may require a ROM upgrade. ** Applies to half-width system boards with 16 slots like the G6 DL170h A BIOS setting on select ProLiant 100-series G6 servers allows the PC3-10600R memory modules to run at 1333 MT/s with two DIMMs per channel. HP design and testing have produced system boards with signal integrity that can operate at 1333 speeds in this configuration without degradation. Only HP branded DIMMs have been fully validated to operate at this speed. Therefore, HP does not recommend configuring the BIOS setting for 1333 MT/s data rates with two DIMMs per channel when using third-party DIMMs, because they may not meet HP's stringent design requirements. Operating the memory at 1333 MT/s is supported only on select 100-series G6 servers using Xeon 3400 or 5500 Series processors operating at 95W or 130W. For help configuring DDR-3 memory in ProLiant G6 servers, use the DDR-3 Memory Configuration Tool found at http://h18004.www1.hp.com/products/servers/options/tool/hp_memtool.html. 9