Samsung M378T5663QZ3-CE6 4GB 2 x 2GB PC2-5300U DDR2 667 CL5 Desktop Memory Kit Manufacturer: Samsung Memory Kit Manufacturer Part #: M378T5663QZ3-CE6 Memory Type: 240-Pin DDR2 SDRAM Capacity: 4GB 2 x 2GB Bus Type: PC-5300U 667Mhz