The HP 497763-B21 is available from Calhoun Technologies. Calhoun Tech can help your company save up to 80% on IT Hardware. Manufacturer: HP Part Number: 497763-B21 Details: HP 800Mhz Pc2-6400 Cl6 Ecc Registered Ddr2 Sdram Dimm Genuine Hp Memory Kit For Hp Proliant Server Dl585 G5