I've been on F11C and unable to get a stable 5GHz (50x CPU ratio, 47x uncore/ring ratio) no matter how much voltage I pump into it. At best I'd be able to run stress tests like Prime/AIDA64/RealBench/OCCT, however, I'd get WHEA errors (reported in HWiNFO64).
Someone posted BIOS F11K in the OCN thread, including a modded version with the faster (older) microcode. Since I was already dismayed thinking that I may have damaged the CPU already from pushing its thermals hard while trying to overclock it, I thought why not at least try this newest BIOS -- despite the fact that I've read a number of people say that F11C was the last good/stable BIOS, and everything new since then has been garbage.
Just wanted to report to any interested that F11K has been 100% solid for me at 5GHz/4.7GHz with medium-LLC and 1.37v. I know that vcore is probably high for most of you, but I have yet to experiment backing it down. With F11C, I wasn't even able to get stable up above 1.4v, so this is a welcome improvement for me.
RAM (Corsair Vengeance) is also OC'd from 3200MHz to 3600.
I was hoping this BIOS might have an option to change RGB LED lighting inside it, but it does not. I recall reading that it was possible to mod these BIOSes to add this ability. Anyone have experience with that?
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I've also dabbled in testing whether to disable HPET timer or not, testing DPC and whatnot with LatencyMon (
https://www.resplendence.com/latencymon) and TimerBench (
https://www.overclockers.at/articles/the-hpet-bug-what-it-is-and-what-it-isnt), but I'm not sure if the whole HPET vs. other timers debate is snake-oil or not. Any thoughts/input on this would be appreciated.