Kingston 1GB 240-Pin DDR2 SDRAM ECC Registered DDR2 667 (PC2 5300) Server Memory Model KVR667D2S4P5/1G 1GB 667MHz DDR2 ECC Reg with Parity CL5 DIMM Single Rank, x4 Standard 128M X 72 Parity 667MHz 240-pin Registered DIMM (DDR2, 1.8V, CL5, FBGA, Gold) KVR667D2S4P5/1G ECC Registered