Good day everyone.
My system has a Z790E first version, I9-13900K and the rest is irrelevant to this issue. The BIOS is...well, continue reading...
After applying new thermal compund yesterday, I ran some stress tests to check the new temps and noticed that I had very bad core clocks, something like 4.7 GHz on the P-cores, while everything else was maxxed out (power, usage etc), that's using HWInfo; I must add I tried some mild undervolt to no avail, and the BIOS was the latest 3001.
After some thinking, I decided to buy a new AIO, as the old one had a small but significant dent on the copper plate (don't ask me how that happened, my best guess is a hard hit while I was mounting it last time), and the clerk suggested to try a BIOS downgrade.
Doing that, on version 1904 and new cooler everything went back to normal after loading default settings and enabling XMP, I saw 5.5 GHz on the P-cores and a 39700 Cinebench23 score while temp never went above 96 C.
The trouble started when I decided to flash the 3001 BIOS version again, and again loading default settings and enabling XMP: P-cores down to 5.1 GHZ and Cinebench score tanked to 36500, while temp was down to 70 C and CPU voltage around 1.3V...well, just to say I'm not too happy to have a 13900K with a 13900K power consumption and a 13600F performance...
Now I understand the safeguards Intel stuffed inside the new microcodes, but I find this frequency slowdown a bit too extreme, "tell me the 13th and 14th generations are screwed without telling me the 13th and 14th generations are screwed".
Where in the BIOS setting may I find how to return back to 13th gen performance? That is, without resorting to flash an old BIOS...thanks...I hope that's not too much of a wall of text...
