So I've been noticing that my computer has been acting a little slower than usual, and my graphics card (radeon hd 4870) has seemed to not be performing as well as it has in the past. I do a little bit of investigating and find that my power supply is only outputting 10.18v on the 12v rail. Also, under load, my cpu clock drops from 3411 to 802 on each core of my phenom II x4 940 which is installed on an ASUS M3A79-T Deluxe. The drop in clock speed seems to be directly linked with the drop in vcore voltage from 1.47 to 1.01-1.02v. I assumed I had a faulty power supply so I replaced it yesterday with a brand new thermaltake 850w (which replaced my PC Power&Cooling 750) but I am now having the same issue. I used OCCT to get my readings, and I know software based monitoring of these values is not the best way to do it, but it definitely seems that I have a problem regardless. Even my benchmarks are almost half of what they should be as compared to similar systems, on the gpu and cpu sides. By buying the new PSU I ruled that out as being the culprit, but now I'm at a loss of what to do. Any insight on this problem would be extremely helpful. Thanks!