X51 R2, random power cycle while gaming

Hello all, as the title suggests I have an x51 R2 and during gaming sessions it has recently taken to rebooting, it also happens to me occasionally while not gaming so I'm not sure I can entirely blame my graphics card. 

I'm running the NVIDIA GTX 760ti 

I have tried a new 240 power supply that did nothing im going to grab the 330 PSU to see if that changes things. I've debated hooking up a standard 500w PSU to the board and see if that changes anything but I don't want to dig that hole just yet 

Ive done my research and can't find a fix that works. Hoping one of your had had this issue and can confirm or deny a fix

I'm close to just canabalising this thing for my next build.