8GB (2x4GB Kit) PC5300 667 MHz CL5 ECC DDR2 RDIMM
IBM Memory Kit 8GB (2x4GB), 8 GB, 2 x 4 GB, DDR2, 667 MHz
IBM Memory Kit 8GB (2x4GB). Internal memory: 8 GB, Memory layout (modules x size): 2 x 4 GB, Internal memory type: DDR2, Memory clock speed: 667 MHz, CAS latency: 5