Think that vcore looks ok, checked a few other threads and folks had 1.5-1.6v for higher clocks 3.6 - 3.8GHz, some running for over 18months at those voltages. Is that vcore setting in the bios or reading it from cpu-z? I normally use the 2 core prime 95 to test, usually does the trick ok in identifying a system that won't be stable long term. There are others out there but not really used them.