Nothing wrong with C7H and TBH UEFI in whatever state it maybe considered isn't holding back HW.
I lost 2 threads at ~18.5hrs & 19.66hrs.
The setup was:-
2700X using PE: Default PBO: Enabled with BCLK OC to enhance further CPU frequency.
RAM was using a RAM divider of 3466MHz so with the BCLK it worked out 3598MHz.
Not shabby IMO.
Prior to the loss of threads at ~18hrs continuous load, in the ~15hrs screenie, CPU average MHz was 4.23GHz all cores, when loaded with P95 v28.10b, lighter loads it would be rocking higher frequency for sure
😉 .
I had my C7H since launch, CPU in below screenie topped out at 3466MHz for RAM, at the time I used manual OC and on air cooler.
Above is from UEFI in May 2018....