I OC'd my 8350 a while back to 4.8. It's been stable as ever, and temps are always great as I don't do much except for gaming.
Yesterday I converted a video from one format to another, and my CPU was almost instantly 75c. Today I decided to stress it with Prime 95, and the same happened, and my PC crashed. I atleast know i'm unstable, but I don't want to increase my voltage to make it stable if my temps will continue as they are. How can I fix this..
The only time my FX-8320 hits those temps are during Prime95 and y-cruncher runs at 4.833GHz with nearly 1.6 volts on the VCore, and that's with a CoolIT ECO 120 single rad and two Delta fans at around 3000RPM.
Like everyone else suggested, I'd check the contact between your water block and your CPU's IHS. Those temps don't look right at that voltage.
Also, are those core temps, or socket temps? My core temps have gotten as high as 80C during suicide runs.
I have also had my [email protected] get up to 80C before in a few benches. Only ones that max out all cores for long periods of time. It does not seem to have degraded the chip though. As I set my best score ever on Amd realbench last night moving me into 5th place AMD. Honestly I think any where under 70 is good to go. It will go to 80C but I dont recommend it. Might even be that my core temps are not reading correct?