Crucial Ballistix Tactical Tracer 4GB Kit (2GBx2) DDR3 1600 MT/s (PC3-12800) CL8 @1.5V UDIMM 240-Pin BLT2CP2G3D1608DT2TXRG Designed for performance enthusiasts, gamers and power users Enhanced heat spreader Advanced speeds and timings (XMP Profile) Black PCB Proven stability and reliability