I've run into problems with F11c. AIDA64 stress states will either cause hardware detection errors or if really serious a BSOD. Also, I notice that some of the benchmark tests give me lower numbers.
I just went back to F10 and my benchmark numbers are now what they always were, higher. I'm not sure if F11b acted the same as F11c. I'm going to run more stress states with F10 and see if I get the same errors as F11c.
I ran the AIDA64 stress test for over an hour and no errors. Additionally, core temps were 5-8c lower than with F11c. I will pass on F11 until it runs better on my system.