Dimm identification, Dimm installation guidelines – HP ProLiant DL580 G7 Server User Manual
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Hardware options installation 44
Dual- and quad-rank DIMMs provide the greatest capacity with the existing memory technology. For
example, if current DRAM technology supports 2-GB single-rank DIMMs, a dual-rank DIMM would be 4-GB
and a quad-rank DIMM would be 8-GB.
Although only one data rank is accessed at any given time for each DIMM, optimized command and address
pipelining via various interleaving schemes enables the Intel® Xeon® Processor E7-series and 7500-series
processor architecture to benefit from dual-rank and quad-rank DIMMs. A dual-rank DIMM performs
significantly better than its single-rank counterpart. A quad-rank DIMM provides further performance
improvement even at the same DIMM capacity.
DIMM identification
To determine DIMM characteristics, use the label attached to the DIMM and the following illustration and
table.
Item Description
Definition
1
Size
—
2
Rank
1R = Single-rank
2R = Dual-rank
4R = Quad-rank
3
Data width
x4 = 4-bit
x8 = 8-bit
4
Memory speed
10600 = 1333-MHz
8500 = 1066-MHz
5
DIMM type
R = RDIMM (registered)
For the latest supported memory information, see the QuickSpecs on the HP website
DIMM installation guidelines
This server supports two memory cartridges per processor. Each memory cartridge can support up to eight
DIMMs. Eight memory cartridges provide a total of 64 DIMMs per system. When installing DIMMs in the
memory cartridge ("
" on page
), observe the following minimum guidelines: