8GB Kit (4GBx2), 240-pin DIMM, DDR2 PC2-6400 memory module
Crucial 8GB DDR2 PC2-6400 Quad Kit, 8 GB, 4 x 2 GB, DDR2, 800 MHz, 240-pin DIMM
Crucial 8GB DDR2 PC2-6400 Quad Kit. Internal memory: 8 GB, Memory layout (modules x size): 4 x 2 GB, Internal memory type: DDR2, Memory clock speed: 800 MHz, Memory form factor: 240-pin DIMM, CAS latency: 5, ECC