PNY Optima MD2048KD3-1333 2GB 2x1GB Dual Channel Kit DDR3 1333 MHz CL 9-9-9-24 PC3-10600 Desktop DIMM Memory Module Memory capacity upgrade provides improved system performance and responsiveness Deliver all the productivity your PC has to offer with PNY Memory Compatible with PC3-10600 (1333 MHz) systems Helps prepare your PC for running Windows Vista Easy installation, Free 24-hour Technical Support, and Lifetime Warranty!