Wintec ONE MHzCL9 8GB(2x4GB) UDIMM Kit 1.5V with HS 8 Dual Channel Kit DDR3 1333 (PC3 10600) 240-Pin SDRAM 3OH13339U9H-8GK 8GB 1333MHz 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