Nanya NT2GT64U8HD0BY-AD 4GB 2 x 2GB PC2-6400U DDR2 800 NonECC Desktop Memory Kit Manufacturer: Nanya Memory Kit Part Number: NT2GT64U8HD0BY-AD Type: 240-Pin DDR2 SDRAM Capacity: 4GB 2 x 2GB Bus Type: PC2-6400U 800Mhz