Ballistix BLS2K4G3D18ADS3 Sport XT 8GB Kit 4GBx2 DDR3 1866 MT/s PC3-14900 CL10 at 1.5V UDIMM 240-Pin Memory Performance memory for gamers and enthusiasts Tall, aggressive heat spreader XMP profile for advanced speeds and timings Premium-quality DRAM Available in 4GB and 8GB DDR3 modules speeds up to 1866 MHz Easy to install Limited Lifetime Warranty