PSU random shutdowns

[Sarlic]

Im getting some weird shutdowns on my Corsair HX 850. Im running a gtx 780 sli set up and im thinking I don't enough power. Sometimes everything runs fine for hours and than other times the system will shutdown suddenly which requires me to turn the power off from the PSU to get the system to re-boot.

I brought the machine prebuilt from OC about 4 months ago its a green titan Envy but got OC to change the mobo to a Gigabyte Z87X and upgrade the PSU so I can run a sli setup everything else runs fine Temps all good etc.

Any advice would be much appreciated

 

[Josh]

Go into the Event manager and check what the critical error reason is. Mine was Kernel Power.

My 600W Corsair was doing this, I stepped back all my O/C's and "touch wood" it has been fine so far, going to get a better PSU in the New Year sales.