The memory DIMMs used in the HP Integrity rx8620 Server are sold in quads and are custom designed by HP. Each DIMM contains 36×4 SDRAM memory chips qualified to run at 125 MHz, with full ECC protection. DIMM sizes of 512 MB, 1 GB, 2 GB and 4 GB are supported. HP 9000 rp8400/rp8420 memory modules can be carried forward to the rx8620 server. Each HP Integrity rx8620 Server cell board supports up to 16 DIMM slots and 16 GB/s of peak memory bandwidth. The 16 GB memory modules (4×4GB DIMMs) cannot be mixed with other memory DIMM sizes. When purchased from the factory, any given partition can ordered with 4 GB DIMMs or non stacked DIMMs (512 MB, 1 GB or 2 GB), but not both. When field integrated, cell boards can contain 4 GB DIMMs or non stacked DIMMs (512 MB, 1 GB or 2 GB), but not both.
