http://www.newegg.com/Product/Produc...82E16820104140 Brand Kingston HyperX Model KHX1333C7D3K2/4GX Type 240-Pin DDR3 SDRAM Tech Spec Capacity 4GB (2 x 2GB) Speed DDR3 1333 Cas Latency 7 Timing 7-7-7-21 Voltage 1.65V ECC No Buffered/Registered Unbuffered Multi-channel Kit Dual Channel Kit Heat Spreader Yes Features XMP Ready