Hardware options installation 47
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
Voltage rating L = Low voltage (1.35v)
Blank or omitted = Standard
5
Memory speed 10600 = 1333-MHz
8500 = 1066-MHz
6
DIMM type R = RDIMM (registered)
E = UDIMM (unbuffered with ECC)
For the latest supported memory information, see the QuickSpecs on the HP website (http://www.hp.com).
Advanced ECC memory
Advanced ECC memory is the memory protection mode for this server. In Advanced ECC, the server does not
fail because of correctable memory errors. The server provides notification if the level of correctable errors
exceeds a pre-defined threshold rate.
Advanced ECC provides additional protection over standard ECC because it is possible to correct certain
memory errors that would otherwise be uncorrectable and result in a server failure.
Whereas standard ECC can correct single-bit memory errors, Advanced ECC can correct single-bit memory
errors and multi-bit memory errors if all failed bits are on the same DRAM device on the memory module.
Installing DIMMs on the primary processor memory board
To install the component:
1. Power down the server (on page 25).
2. Remove the processor memory drawer (on page 27).
3. Remove the processor memory drawer cover.
