How to stop frequency spikes on Manli RTX 5090 D?
When hitting those complex global illumination scenes, the frequency curve on my Manli RTX 5090 D started acting up with these weird jagged jumps, especially with full path tracing on. I noticed the core clock was bouncing wildly between 2400-2700MHz, which sent my frame times swinging from 12-35ms—it felt like a total slideshow. I tried toggling 'Prefer Maximum Performance' in the driver, but that was a waste of time; I gained maybe 4 FPS on average, but the 1% lows stayed stuck above 38ms. I eventually got fed up and used a third-party tool to lock the core voltage at 1.08V and pushed the fan trigger point up to 55℃. Checking HWiNFO, the clock fluctuation finally tightened up to a steady 2650-2680MHz. It wasn't a walk in the park, though; after the first lock, I hit two black screens during sleep mode. I had to dial the minimum frequency floor back to 600MHz to stop the crashing. Now, temps sit comfortably between 64-71℃ and the frame times are rock steady at 5.1-6.4ms.
