So, I have been having this PFN list corrupt bsod and game crashes, the biggest of all is Overwatch with its "Rendering device has been lost". I was starting to suspect my PSU as the culprit of my woes, So I got out my backup Sun Flower 450W and used that to just power the GPU only while my main Corsair CX750M does the rest and low and behold no crash in Overwatch.. Huh.. So just the the hell of it I unplugged my UPS and tried Overwatch again but with my Corsair PSU. No crash. I am about to re-connect to it and try Overwatch and see what happens. I'm hoping it crashes as then it means I found out what the hell is wrong! If it don't then I guess Ill try the 450w on my whole system with and without the UPS and see how that goes. But anyone heard of a UPS causing stability issues with a PC?