I bought an alienware pc about 3 years ago and thr PSU just died, i bought a new corsair HX850 and installed it today.
however it is smaller than my old PSU, the screw holes seem to align however the PSU does not reach the little 'support shelf' running along the side meaning the entire weight of the PSU is being help up by 3 screws.
Any ideas of anything i could buy or make to bridge the gap from the prebuilt support shelf and the PSU, the gap is about 1 CM high
More aboutsmall alienware case
There should be 4 screws not three. You mave have mounted it upside down.