My CPU is downclocking during Chernobyl map loads with the Jonsbo CR-1400. How do I fix this lag?

The moment my frames tanked from 85 down to 42, I knew my thermals had hit a wall—that kind of cliff-dive is lethal when you're trying to sneak. Looking at the logs, the Jonsbo CR-1400's single-tower design just couldn't keep up with the heavy environment rendering, with core temps spiking to 92-96℃ and forcing my clocks to plummet from 4.8GHz to 3.1GHz. I tried enabling power-saving mode to cool things down, but it just turned the game into a slideshow, which was incredibly frustrating. I ended up ripping the cooler off and swapping the stock paste for a high-end 13.5 W/mK compound and bumped my front intake fans to 1500 RPM. RTSS showed core temps stabilizing at 68-75℃, and frame times tightened from 22-40ms to a crisp 12-16ms. I actually messed up the mounting pressure on the first try, and one core stayed hot until I re-torqued the screws properly. Now, with fans humming at 1200-1400 RPM, the noise is bearable. Ran an OCCT stress test and it's finally stable, with memory temps holding at 58-63℃.