Elpida EBE21UE8AFFA-8G-F 4GB 2 x 2GB PC2-6400U DDR2 800 Desktop Memory Kit Manufacturer: Elpida Part Number: EBE21UE8AFFA-8G-F Memory Type: 240-Pin DDR2 SDRAM Capacity: 4GB 2 x 2GB Bus Type: PC2-6400U 800Mhz