BLT2CP4G3D1608DT2TXOBCEU is a 8GB kit consisting of 2 4GB DDR3 Performance modules that operates at speeds up to 1600 MT/s & has a CL8 latency with extended timings of 8-8-8-24 @ 1.5V. It is Performance & is non-ECC. It conforms to the industry standard UDIMM layout of 240 pins & is compatible with computers that take DDR3 UDIMM memory. The new Crucial Ballistix Tactical Series is designed for performance enthusiasts, gamers & power users. Ballistix Tactical features increased speeds & timings, a black PCB, & enhanced heat spreader for enhanced thermal performance. If you are looking for reliable, quality memory ideal for stability & compatibility while kicking up the performance factor, the Ballistix Tactical Series is a perfect fit. Available in DDR3 in all popular speeds & densities.