Patriot PDC22G6400LLK 2GB 2 x 1GB PC2-6400U DDR2 800 Non-ECC Unbuff Memory Kit Brand: Patriot Extreme Performance Model: PDC22G6400LLK Type: 240-Pin DDR2 SDRAM Capacity: 2GB 2 x 1GB Speed: DDR2 800 (PC2 6400)