Have you actually sat down and tested your OC? If you can run Prime95 for at least 24 hours without errors, the CPU is considered to be stable. You need to actually stress your CPU as simply getting into Windows isn’t good enough. Start off with the stock speeds, then up your OC by 5-10MHz at a time, testing for stability. If you hit a problem, bump up the voltage a little. If you don’t have Watercooling, do not go any higher than 1.6V on the vCore.