AB542A HP 1-GB Chip Spare PC2100 DDR-SDRAM Memory Quad

AB542A is a 1-GB chip spare PC2100 DDR-SDRAM memory quad of four 256MB DIMMs, for the HP 9000 rp3410 and the HP 9000 rp3440. HP calls the part the rp3400 1GB DDR-SDRAM memory, and the spare module is A6967AX, a 256MB, 266MHz, PC2100 DDR-SDRAM DIMM memory module.

Both servers have twelve DIMM slots, and the minimum memory in each is 1 GB, four 256-MB DIMMs, which is AB542A. In the rp3410 the options are the 512-MB pair A9772A (two 256-MB DIMMs), this 1-GB quad and the 2-GB quad A9773A (four 512-MB DIMMs). A second pair of 256-MB DIMMs, the 512-MB option, has to be added to make a quad before other memory goes in, and a third 256-MB pair is not supported.

Memory is loaded in the order marked on the system board, with two DIMMs on each of the two memory buses, for 8.5 GB/s of total bandwidth. The rp3410 tops out at 6 GB, twelve 512-MB DIMMs. The rp3440 also takes the 4-GB quad A9774A and the 8-GB quad A9775A; each of its quads is four equal-density DIMMs and its maximum is 32 GB, eight 4-GB DIMMs.