Full Details on Amazon.com : http://www.amazon.com/gp/product/B001ISJ96O?tag=tsukuyomi-20
PNY XLR8 MD4096KD2-800-X4 4GB 2x2GB Dual Channel Kit DDR2 800 MHz CL 4-4-4-12 PC2-6400 Desktop
Runs at 800 MHz CL4 with 4-4-4-12 timings at 20 volts
Deliver all the productivity your PC has to offer with PNY Memory
Compatible with PC2-6400 800 MHz PC2-5300 667 MHz and PC2-4200 533 MHz systems
Helps prepare your PC for running Windows Vista
Easy installation Free 24-hour Technical Support and Lifetime Warranty