HP 8GB Fully Buffered DIMM PC2-5300 2x4GB DDR2 Memory Kit
HPE 397415-B21, 8 GB, 2 x 4 GB, DDR2, 667 MHz
HPE 397415-B21. Internal memory: 8 GB, Memory layout (modules x size): 2 x 4 GB, Internal memory type: DDR2, Memory clock speed: 667 MHz