HP BL685C G6 - Manual (Page 38)

Hardware options installation 38
Advanced ECC provides additional protection over Standard ECC because it is possible to correct certain
memory errors that would otherwise be uncorrected and result in a server blade failure. The server blade
provides notification that correctable error events have exceeded a pre-defined threshold rate.
DIMM installation guidelines
Observe the following guidelines when installing additional memory:
• Install only the following memory types:
o ECC PC2-6400 Registered DDR2 SDRAM DIMMs
o ECC PC2-5300 Registered DDR2 8-GB SDRAM DIMMs
• Install DIMMs in pairs (banks) beginning with banks farthest from each populated processor.
• Install DIMMs with the greatest capacity in the banks farthest from the processor.
• Install identical DIMMs with the same part number in a bank.
• DIMMs must be installed for processor 1.
• DIMMs installed in different banks can be of different sizes.
• For best performance, populate one bank of memory for each installed processor before populating
more than one bank for a specific processor.
• DIMMs installed in banks for processor 3 and 4 can be used only if processor 3 and 4 are installed.
• Processors 3 and 4 can be installed without memory.
CAUTION: Always wear an antistatic wrist strap when working inside the server.
DIMM population order
Banks Dual processor Quad processor
1A, 2A and 9E, 10E 1st 1st
3B, 4B and 11F, 12F 2nd 3rd
5C, 6C and 13G, 14G 3rd 5th
7D, 8D and 15H, 16H 4th 7th
17I, 18I and 25M, 26M — 2nd
19J, 20J and 27N, 28N — 4th
21K, 22K and 29O, 30O — 6th
23L, 24L and 31P, 32P — 8th
Installing DIMMs
To install the component:
1. Power down the server blade (on page 15 ).
2. Remove the server blade (on page 16 ).
3. Remove the access panel (on page 17 ).