Product UPC: 846651006707 The HP AD274A is available from Calhoun Technologies. Calhoun Tech can help your company save up to 80% on IT Hardware. Manufacturer: HP Part Number: AD274A Details: HP AD274A 2GB 2 x 1GB 533MHz DDR2-533/PC2-4200 ECC DDR2 SDRAM 240-pin DIMM