Increase CPU multiplier by 0.5 and run P95 Blend for at least 20Mins to check for stability.
Always have HWMonitor open on the desktop to monitor core temps. Max stable core temp now called Package Temp is typically ~60c, somewhere in there and Socket Temp/Cpu Temp is ~70c.
When you first fail the 20 minute Prime blend test, increase your CPU core voltage by .025 and retest. If you still fail, add another .025 vcore. Then retest, repeating the pattern outlined. Stop adding vcore when your reach 1.5 or core temps exceed the parameters mentioned above.
Failing the Prime test can mean blue screen, spontaneous restart, lockup or one of the Prime core workers dropping out. Post back after you have added two increments of vcore or hit the mid 50's core temp wall. When you post, attach pics of HWMonitor from your last Prime95 blend run and the THREE captures of CPUz > CPU Tab, Memory Tab and SPD Tab.