Crucial Ballistix Sport 4GB Single DDR3 1333 MT/s (PC3-10600) CL9 @1.5V UDIMM 240-Pin Memory BLS4G3D1339DS1S00
BLS2G3D1339DS1S00 is a single 4GB DDR3 modules that operates at speeds up to 1333 MT/s and has a CL9 latency with extended timings of 9-9-9-24. It is Performance and is non-ECC. It conforms to the industry standard UDIMM layout of 240 pins and is compatible with computers that take DDR3 UDIMM memory.