I have a simelar issue with my Sandybridge 2500k. My CPU Multi is set to 43x but i often get odd clockrates like 4.4ghz. Is that a reading error? I can're really reproduce it. I guess it happens while being in games since i can't reproduce it with prime. Any idea? (im using the latest beta already)
Yes, it's possible that when the system is under a high load, such a glitch in measurement can happen. This is can happen on all CPUs prior to Skylake. Skylake CPUs should no longer be affected, as they feature a much more reliable measurement method.