Genuine Dell Inspiron 546, 546s Mini Tower MT and Slim Tower ST, Dimension 2010 Systems, Heatsink and Fan Assembly, CPU Heatsink + Fan Part Number K640N, 4-Pin Fan Plug Fits Dell Inspiron 546 and 546S Systems Fits Dimension 2010 System Fan & Heatsink 4-Pin Fan Plug Dell Part Number: K640N