4GB Kit 2 x 2GB Memory for HP ProLiant DL385 PC3200R ECC Registered DDR 400MHz 184 pin 2.5v DIMM. EQUIVALENT TO 379300-B21, 410939-001 (2 pcs). (PARTS-QUICK) Speed: DDR PC3200R 400MHz Form Factor: 184 pin ECC Registered DIMM 2RX4 Capacity: 4GB Total 2 X 2GB KIT Warranty: Lifetime FOR LISTED SERVERS ONLY. PLEASE DO NOT BUY FOR DESKTOPS.