AB224A HP 4-GB DDR-SDRAM Memory Pair (2 x 2GB DIMMs)

AB224A is a 4-GB DDR-SDRAM memory pair of two 2GB DIMMs for the HP Integrity rx1600 and the HP Integrity rx1620. The DIMMs are PC2100 ECC registered DDR266A SDRAM. HP calls the option the rx1600 4GB 2x2GB DIMMs SDRAM memory, and its spare is A6835-69001, a 2.0GB, 266MHz, PC2100, registered ECC DDR SDRAM DIMM memory module.

With eight DIMM slots, these servers top out at 16 GB, which is eight 2-GB DIMMs. The two DIMMs of a pair must be of equal density, and one DIMM of each pair goes on each memory bus. Where chip sparing is wanted, DIMMs of the same size are loaded four at a time as quads. Memory bandwidth totals 8.5 GB/s over two 4.25-GB/s buses.

The smaller pairs for the same servers are AB221A (512 MB, two 256MB DIMMs), AB222A (1 GB, two 512MB DIMMs) and AB223A (2 GB, two 1GB DIMMs). The smallest memory configuration for the servers is 512 MB.