Memory Subsystem; Add-On Memory - HP Integrity BL870c User's & Service Manual

Memory Subsystem

The HP Integrity BL870c server blade supports 24 DIMMs, which are mounted on a removable
memory mezzanine board. The server blade physical memory subsystem includes DDR2 SDRAM
DIMMs, as well as zx2 scalable memory expanders, memory bus traces, and required termination.
The memory subsystem supports only DDR2 SDRAM technology using industry-standard 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 (128 bits of data, 16 bits of ECC), and has 12 DIMM
slots for a total of 24 slots (12 DIMMs per cell). All 24 DIMM slots are shared by both processors.
The minimum amount of memory supported in the server blade is 4 GB (four 1-GB DIMMs).
The maximum amount of memory supported in the server blade is 192 GB (24 8-GB DIMMs).
The DIMMs used in the server blade are low-profile (1.2" tall) DIMMs. Only HP qualified DIMMs
are supported.
Table 4 summarizes the BL870c server blade memory configurations.
Table 4 Server Blade Memory Array Capacities
Min / Max Memory Size
4 GB / 24 GB
8 GB / 48 GB
16 GB / 96 GB
32 GB / 192 GB
NOTE: DIMMs must be installed as quads (four identical DIMMs) to enable lock-step mode and
chip sparing. Different size DIMMs can be installed, but each quad must have identical capacity
DIMMs.
Install DIMM quads from highest capacity to lowest capacity (for example, install the 4-GB DIMMs
first, then the 2-GB DIMMs, then the 1-GB DIMMs). Install DIMMs into slots 0A, 0B, 0C, and 0D
first, then 1A through 1D, and so forth.
For more information, see

Add-On Memory

To locate the HP part number, look at the HP Security/CT Label located on the DIMM.
AH253A (4 x 2 GB DIMMs) memory with the HP part number AB565DX cannot be mixed on the
same physical rank as 2 GB memory with the AB565BX HP part number.
IMPORTANT:
memory and can result in de-allocation of the entire quad or pair.
Firmware Updates
HP Integrity BL870c server blades require system firmware version 03.02 or later to support the
following Memory Add-On products:
AD343A 2 GB DDR2 Memory Pair (2 x 1 GB DIMMs)
AD344A 4 GB DDR2 Memory Pair (2 x 2 GB DIMMs)
AD345A 8 GB DDR2 Memory Pair (2 x 4 GB DIMMs)
Before installing any of these memory products, verify the server firmware version is equal to or
higher than the version listed above for your product. On HP Integrity servers, you can determine
the firmware version using the following EFI Shell info fw command:
Shell> info fw
18 Overview
Single DIMM Sizes
1 GB
2 GB
4 GB
8 GB
"Installing DIMMs" (page 36)
Earlier versions of system firmware do not support the installation of this replacement
.