Kingston ValueRAM 4GB 1066MHz DDR3 Non-ECC CL7 DIMM Desktop Memory,Kingston Technology Company, Inc.,KVR1066D3N7/4G" /> One 4GB module of 1066MHz DDR3 Desktop Memory. Cas Latency 7. Timings 7-7-7-21. Specifically designed and tested for compatibility in various makes and models of desktop computers From the industry leader in PC memory Backed by a lifetime warranty and free technical support