How do I fix SILENT HILL 2 frame generation time spikes during combat?

Group combat in SILENT HILL 2 was unplayable as frame generation time spiked from 8ms to 43ms due to I/O bus contention. I tried disabling my camera in Device Manager, which helped but killed my stream, a frustrating trade-off. I used GamePP Peripheral Driver Conflict Detector to set Razer Synapse background sync to manual and enabled hardware encoding priority in OBS. RivaTuner showed frame generation interval converging from 8-43ms to a stable 7-11ms. CPU usage dropped to 63-71%, and the game is finally fluid, making this a great verify for my setup.