Tuning this took me was way way longer than I will care to admit, I tirelessly tried to get 8300/8400 stable but even tho I could boot into Windows and mess around, I could never get them to pass Karhu for more than 7%.
So I settled on 8200, now yes this is CL32, and it requires 1.74v VDDQ 😬, I'm on water and direct touch, so I'm not worried about temps, but I'm likely going to put it back at CL34, as I only needed 1.55v to daily CL34.
Overall I'm happy with it and there's pretty much nothing that I believe I can improve upon, as most of the timings going any lower will error, or no boot.
And no I don't have any stability test screenshots, but it has been through at least 20,000 karhu, passed tm5 absolut and ryzen3d DDR5, memtest pro, and about two hours of ycruncher, one hour with just vt3, the other hour with vt3, fftv4 and n63.
Edit: this is on an AMD CPU.