what is Rank - A group of DRAMs that are tied to a single, unique chip select. Note that there is a distinction between rank (for a memory module) and bank (for a DRAM). The number of chip selects on the memory controller will determine the number of memory ranks it can support. DIMMs that have a single chip select are called 1-rank (one rank or single rank). DIMMs can have multiple chip selects, DIMMs that have two chip selects are called 2-rank (two rank or dual rank) and DIMMs that have 4 chip selects are called 4-rank (four rank or quad rank)

(Keyword search: single versus dual ranked dimm)

RAMpedia is a DRAM memory encyclopedia and reference tool
to help computer hardware board designers with DRAM memory subsystems.
This information is provided as a courtesy by Virtium Technology.
www.virtium.com