Patriot Extreme Performance 4 GB PC2-6400 DDR2-800 Dual Channel Desktop Memory Kit - PDC24G6400LLK Extreme Performance PC2-6400 (DDR2-800) Low Latency (4-4-4-12), EPP Ready 100% Tested and Verified Tested and compatible with Intel P35, P45, X38, X48 and NVIDIA 680i, and 780i chipsets