PNY 4 GB Kit (2x2 GB) DDR2 800MHz 4 Dual Channel Kit (PC2 6400) 240-Pin DDR2 SDRAM - MD4096KD2-800-V2 Memory capacity upgrade provides improved system performance and responsiveness Deliver all the productivity your PC has to offer with PNY Memory Easy installation, Free 24-hour Technical Support, and Lifetime Warranty!