As far as I can tell GPU is working fine, its running at around 40 degrees, I even tried putting my old GPU back in and I get the same sort of tempretures for my CPU. As for the PSU its a Corsair TX 850W 80 Plus, I think that is a pretty well known brand.
My PSU does have alot of cables coming out from it, most which are not in use, can that have an effect? Unfortunately I do not have the old PSU anymore so I cant test it.
Is there a way to test if the PSU is working properly or not?