How to fix core scheduling lag on the ROG Z890-A Snow?
Whenever I went for a fast flick, my frame rate would wildly swing between 400 FPS and 180 FPS, which is an absolute nightmare for any competitive player. I dug into the logs and found that the P-Cores and E-Cores on the ASUS ROG Z890-A Snow Edition were hitting a 15-25ms scheduling delay during high-frequency inputs, causing massive spikes in frame time. I tried enabling Ultimate Performance mode in Windows first, but while it bumped my peak FPS by about 20, the stuttering actually got worse—total waste of time. I eventually dove into the BIOS, switched the core scheduling mode to Performance Priority, and manually set the CPU core voltage offset to +0.01V to tighten up the stability. Monitoring through HWiNFO, the clock speeds finally locked in between 5.2GHz - 5.5GHz, and the stutters vanished. I actually messed up the first attempt by pushing the voltage too high, which triggered a thermal shutdown and a reboot, so I had to dial it back by 0.005V to get it stable. CPU temps sat around 65℃ - 72℃ with VRMs at 58℃ - 64℃. After an hour of stress testing, the frequency curve is smooth as butter. Settings saved.
