2pcs of 2GB PC2-3200 ECC Registered DIMM, Dual Rank.

System addresses 8 memory Ranks ONLY. Use of Dual Rank kits are limited to the first two banks. The third bank must not be populated. HP ProLiant DL380 G4 now supports Dual Rank modules with HP Firmware 4.02 or higher. Customers must install Systems ROMPaq 4.02 12/02/04 BEFORE installing Dual Rank kits. 

ML350 G4p/DL380 G4- Max Memory: 12GB, Sockets: 6

DL580 G3- Max Memory: 64 GB with four Memory Boards installed, Sockets: 4 Socket(s) per Memory Board, 16 Socket(s) total

Compatible with Compaq EFS WAN Accelerator DL380-3010, DL380-5010, Proliant BL20p G3, DL140 G2, DL360 G4p, DL380 G4, DL580 G3, DL580 G4, ML350 G4p, ML370 G4, ML570 G3, ML570 G4.