AB222A HP 1 GB DDR-SDRAM Memory Pair

AB222A is the 1 GB DDR-SDRAM memory module pair, two 512 MB DIMMs, for the HP Integrity rx1600 and the HP Integrity rx1620. The 512 MB DIMM spare is A6968AX, a 266 MHz, PC2100 DDR-SDRAM module. The pair also carries the title HP rx1600 1 GB 2x512 MB DIMMs SDRAM Memory.

The pair options in the range are AB221A at 512 MB, AB222A at 1 GB, AB223A at 2 GB (2x1 GB) and AB224A at 4 GB (2x2 GB). Memory is installed in sets of two DIMMs, and both DIMMs of a pair share one density. The minimum memory is 512 MB (2x256 MB).

Eight DIMM slots allow a maximum of 16 GB with 2 GB DIMMs. A set of four identical DIMMs, which is a quad, is what supports chip sparing, so two AB222A pairs form one.

A pair is split over both memory buses, with a DIMM on each, to ensure maximum bandwidth. Total memory bandwidth is 8.5 GB/s over two 4.25 GB/s buses and the open page memory latency is 80 nanoseconds.