Samsung M378T5663EH3-CF7 4GB 2 x 2GB PC2-6400U DDR2 800 NonECC Unbuff Memory Kit Manufacturer: Samsung M378T5663EH3-CF7 Memory Type: 240 Pin DDR2 SDRAM Capacity: 4GB 2 x 2GB Bus Type: PC2-6400U 800Mhz Error Correction: Non-ECC