Buy Kingston KVR16N11S8/4 4GB RAM Product Line: ValueRAM Capacity: 4GB (1 x 4GB module) Memory Type: DDR3 SDRAM Speed: 1600 MHz (DDR3-1600/PC3-12800) CAS Latency: CL11 Voltage: 1.50V Form Factor: 240-pin DIMM Error Checking: Non-ECC (Error Checking Code not included) Buffering: Unbuffered Packaging: Bulk Warranty: Lifetime warranty