Kingston Hyper X T1 Series 8 DDR3 1866 (PC3 15000) 240-Pin SDRAM Dual Channel Kit KHX1866C9D3T1K2/8GX 8GB Kit (2x4GB modules) of 1866 Mhz DDR3 Desktop Memory Utilizes HyperX module with faster latency timing for higher performance and speed Specifically designed and tested for compatibility in various makes and models of desktop computers From the industry leader in PC memory Non-ECC Unbuffered 1600MHz CL9 240-pin DIMM type