Kingston Technology HyperX LoVo 4 GB Kit (2x2GB Modules) 4 Dual Channel Kit 1600 (PC3 12800) 240-Pin DDR3 SDRAM KHX1600C9D3LK2/4GX 4GB Kit including two 2GB modules of 1600MHz Class 9 Low Voltage 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 Low-Latency 240-pin unbuffered DIMM type