Wintec ONE MHzCL9&nbsp; 8GB(2x4GB) UDIMM Kit 2Rx8 1.5V with HS 8 Dual Channel Kit DDR3 1600 (PC3 12800) 240-Pin SDRAM 3OH16009U9H-8GK 8GB 1600MHz DDR3 memory capacity provides sufficient data space and fast data access operation 9-9-9-24 CAS latency feature; it allows minimal memory access delay UDIMM format; it enables an unbuffered performance compatible with desktop PCs