Installation Guide, Second Edition - HP Integrity BL60p Server Blade

Introduction
Memory Subsystem
Chapter 1
23
Memory Subsystem
The server blade physical memory layout includes the DDR SDRAM memory DIMMs, along with the memory
bus traces and required termination. The memory subsystem supports only Double Data Rate Synchronous
Dynamic Random Access Memory (DDR SDRAM) technology utilizing industry-standard PC2100 type DDR
SDRAM DIMMs. The DIMMs use a 184-pin JEDEC standard connector. The server blade memory subsystem
provides two memory cells; each cell is 144 bits wide each (128 bits of data, 16 bits of ECC). Each cell
accommodates two DIMM slots; in the server blade, space and power limitations restrict the total loaded
DIMM count to four slots (two DIMMs per cell).
The minimum amount of memory that can be installed in the server blade is 1 GB (two 512 MB DIMMs). The
maximum amount of memory that can be installed in a server blade is 8 GB (four 2 GB DIMMs).
The DIMMs used in the server blade must be low-profile (1.2” tall) DIMMs. The DIMMs are standard
DDR2100 registered DIMMs. Only DIMMs qualified by HP are supported.
Following is the recommended load order for DIMM pairs:
• Load slots DIMM0A and DIMM0B first
• Load slots DIMM1A and DIMM 1B second
DIMMs
The memory subsystem supports only Double Data Rate Synchronous Dynamic Random Access Memory
(DDR SDRAM) technology utilizing industry-standard PC2100 type DDR SDRAM DIMMs, 1.2” tall. The
DIMMs use a 184-pin JEDEC standard connector.
You are required to load the DIMMs in pairs. To enable chip sparing, the DIMM pairs must be loaded in
quads (all four DIMMs must be the same capacity). Table 1-4 summarizes the BL60p server blade memory
solutions.
NOTE Loading DIMMs as a quad (four identical DIMMs) enables lock-step mode and chip sparing.
Table 1-4 Server Blade Memory Array Capacities
Min / Max Memory Size Single DIMM Sizes
1 GB / 2 GB 512 MB DIMM
2 GB / 4 GB 1 GB DIMM
4 GB / 8 GB 2 GB DIMM