Product Detail 512 MB module of 266MHz DDR Memory for Dell Dimension 4400 Equivalent part number is DELL 311-1325,311-1714, and 311-1848 184-pin DIMM From the industry leader in PC memory Backed by a lifetime warranty and free technical support . The "Kingston Dell Dimension 4400 512 MB 266MHz DIMM Desktop Memory KTD4400/512" is best product for you. We recommended Kingston Dell Dimension 4400 512 MB 266MHz DIMM Desktop Memory KTD4400/512