4GB DDR2 PC2 4200 ECC Reg Integrity rx6600 server MemoryRAM, Memorystock Part No: 701ms-701
4GB DDR2-533 PC2-4200, 240p DIMM, ECC, Registered, 1.8v. Please Order Qty 2 or 4 for a kit or Dual Channel use.. Compatible memory for Integrity rx6600 server