Dell Dimension Optiplex Heatsink Fan 0U7581 0X837CT92C12MS1A7-57A02 / G922P-A00 12 V DC ~ 0.55 A - MAX 0.605 A 77CFMCompatible Models: Dimension 210L,Dimension C521,Dimension 3100c,Optiplex GX520,Optiplex GX620,Optiplex 320,Optiplex 330,Optiplex 360,Optiplex 740,Optiplex 745,Optiplex 755,Optiplex 760,Optiplex 780, For Optiplex GX520, GX620, 320, 330, 360, 740, 745, 755, 760, 780 DT Systems.And For Dimension 210L, C521 and 3100C Desktop Systems.