Full Details from Amazon.com : http://www.amazon.com/gp/product/B000J1ADDY?tag=onigi-20
PNY OPTIMA 1GB (2x512MB) Dual Channel Kit DDR2 533 MHz PC2-4200 Desktop DIMM Memory Modules
Memory capacity upgrade provides improved system performance and responsiveness
Deliver all the productivity your PC has to offer with PNY Memory
Compatible with PC2-4200 533 MHz and PC2-3200 400 MHz systems
Helps prepare your PC for running Windows Vista
Easy installation Free 24-hour Technical Support and Lifetime Warranty
