replace my gtx550tus with this gtx560tus 448 core card and see a noticeable difference in FSX . max out both graphic score at 7.9 on Windows experience index . by comparison the 550tus give I a 6.4 on graphic . use Corsair 600W psu . card and psu both fit in Gateway DX4840 case just fine . I 'll have no need to o\/c this card ever . .