Kingston Technology Hyper X Red Limited Edition 8GB (2x4 GB Modules) 1333MHz DDR3 PC3-10600 Non-ECC CL9 1.5V 240-Pin DIMM Desktop Memory KHX1333C9D3B1RK2/8G 8GB Kit (1x4GB modules) of 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 1333MHz 240-pin CL9 Unbuffered DIMM