How to fix cache sync jitter on Ryzen 7 9800X3D?
Seeing the frame time graph turn into a straight line is the most satisfying feeling ever. The 9800X3D's massive cache should be a cheat code, but at stock FCLK, I was seeing 15-22ms random spikes that made the movement feel jittery. I first tried PBO auto-overclocking, but while the peak clocks went up, the 1% lows got even worse—it was a total step backward. I eventually locked the FCLK to 2100MHz and tightened the RAM timings to CL30. Monitoring via RTSS, the frame times stopped jumping between 12-28ms and settled into a tight 8-11ms window. I did run into some random BSODs during idle after the lock, but bumping the SoC voltage to 1.2V cleared it up. CPU temps are great, sitting around 62-68℃. The in-game analyzer confirms the stability is way better now.
