...yeah, that's not a 12volt pc fan that's a 4 3/4" axial fan that runs on 110volts if i'm not mistaken, ...i have one in my motherbox build, anyway, below is a link to one similar that you can check out for comparison.
Dayton Axial Fan, 4 3/4 In Sq, 124 CFM, 115 V
...as you can see it pulls...