8GB Kit 2 x 4GB Memory for Dell PowerEdge 2850 Server PC2-3200R ECC Registered DDR2-400MHz 240 pin 1.8v DIMM (PARTS-QUICK BRAND) Speed: PC2-3200R 400MHz Form Factor: 184 pin ECC Registered DIMM 2RX4 Capacity: 8GB Total 2 X 4GB KIT Warranty: Lifetime FOR LISTED SERVERS ONLY. PLEASE DO NOT BUY FOR DESKTOPS.