Performance 4GB PC10600 DDR3 DIMM 1333 MHz Desktop Memory..Universally compatible.4GB (1 x 4GB) / DDR3 1333 / PC3 10600 / 9 CAS Latency.Desktop Memory / DDR3 (240-Pin DIMM) / Single Module Kit.2GB (1 x 2GB) / DDR3 1333 / PC3 10600 / 9 CAS Latency.Performance 4GB PC10600 DDR3 DIMM 1333 MHz Desktop Memory.