8GB Kit 2 x 4GB Memory for Uniwide UniServer 1522 DDR2-400 PC2-3200 ECC RDIMM (PARTS-QUICK BRAND) Capacity: 8GB Kit 2 x 4GB PC2-3200 400MHz Form Factor: 240 pin FOR SERVERS ONLY DO NOT BUY FOR STANDARD DESKTOPS WHICH USE NON-ECC MEMORY Halogen Free; ROHS; Warranty: Lifetime