Tekken 8 is tearing during fast combos because my CR-1400 can't keep the CPU clocks steady. Should I lock my frequency?

That razor-sharp combat feel finally came back after I locked the clocks; it's an absolute rush. The Jonsbo CR-1400 struggles with boost peaks, causing the CPU to bounce between 3.6-4.4 GHz, which manifests as ugly screen tearing. I tried V-Sync first, but the input lag jumped to 45ms—it felt like I was fighting underwater. I went into the BIOS and forced a locked 4.2 GHz clock and enabled Adaptive Sync on my monitor. RivaTuner showed frame times stabilizing from 15-25ms down to 8-11ms, and the tearing vanished. I actually had a few boot loops at first because the voltage was too low, but adding a 0.05V offset made it rock solid. CPU temps are now 68-74℃ with fans at 1500 RPM. Analysis tools show a 99% sync rate and frame times are a tight 5.1-6.4ms.