Crucial Technology CT2CP51272AF80E 8 GB (4 GBx2) 240-pin DIMM&nbsp;&nbsp;DDR2 PC2-6400 CL=5 Fully Buffered ECC DDR2-800 1.8V 512Meg x 72 Memory Kit Capacity: 8 GB : 2 x 4 GB Memory Type: DDR2 SDRAM - FB-DIMM 240-pin Upgrade Type: Generic