Are you overclocking by any chance? In my experience, Skyrim absolutely hates even mild overclocking
Just curious...how does Skyrim know if the clock the CPU is running at is an Overclock??
IF you have a 100% Stable OC, Skyrim could give a crap. I have had MY OC running for 3 years, and Skyrim loves it. I-7 2600K (Stock 3.4 ) running @ 4.8 on AIR.
Do you ever have anything positive to say?
I didn't say anything about the CPU. I have experienced problems with overclocking my GPUs (Titan SLI with a custom vbios) and Skyrim. Just the other day, I tried a mild overclock which immediately caused water to render improperly (massively ugly glitching) in whiterun. I also experienced similar problems two years ago with a different card (gtx 680 with factory vbios) - overclocks that would work for every other game I threw at it would cause Skyrim to crash.
You answered your own question: "If you are running a 100% STABLE OVERCLOCK". What do we do to ascertain whether something is 100% stable? We run a variety of intensive programs for extended periods of time to see if they crash or produce errors. Ideally, these programs should be a blend of synthetics (eg. prime95, aida64) and real-world programs, because different programs stress the hardware in different ways. Skyrim is a real world program, and like every other program, it will obviously have a breaking point in terms of the overclocking you can get away with. In your case, that breaking point might be 5.0 Ghz, while on a different chip with a different mobo and different OS environment, it will be some other frequency.
Like you, I have never had problems with Skyrim and an overclocked CPU either. But that is completely beside the point. You and I are only two people, and our experiences don't mean s***, because everyone's computer setup is different.