One of my friends suggested i post here regarding my overclocking issues with my 2600k and age (maybe also windows 8...)
The CPU used to be a decent overclocker, able to do 5.1 GHz on 1.385v and LLC lvl 10 for shorter stints (staying below 80 degrees celcius), and 4.5ghz as my 24/7 oc using 1.305v and LLC lvl7, super stable and always below 65 degrees celcius.
Recently I upgraded to windows 8 (had the release preview and then used the upgrade discount), and since then i've had trouble getting my pc to boot up on anything above 4.5ghz (even tried 1.45v LLC 7 for 4.6GHz), and even on 4.5Ghz it is not stable for any decent length of time, giving me "machine check exeption" or "system service exception" or "dpc watchdog violation" bsod names, all going away once I back off the OC to something like 4.2 GHz on 1.32v and LLC off...
I've had this CPU for just about two years now, on the same gigabyte p67a-ud7-b3, the same silver arrow cpu cooler and the same corsair HX750w psu (the silver efficiency one)
Is this only processor aging? Is my chip dying? Could it maybe even be my motherboard or psu?