Crucial 4GB Kit (2GBx2) DDR3 1333 MT/s (PC3-10600) CL9 Unbuffered UDIMM 240-Pin Desktop Memory Modules CT2CP25664BA1339

Identical to CT2KIT25664BA1339To use DDR3 memory, your system motherboard must have 240-pin DIMM slots and a DDR3-enabled chipset.This is because a DDR3 SDRAM DIMM will not fit into a standard DDR2 DIMM socket or a DDR DIMM socket.BrandCrucialSKUB001R4BT1M