Why does my Noctua NH-D15S cause lag in GTA V, and how can I fix the driver conflict?

Riding through Los Santos felt like walking through molasses; frame times jumped to 14-42ms via RivaTuner. I initially disabled the lighting device in Device Manager, which stopped the lag but removed all visual effects, ruining the game's aesthetic. That was a dead end. I used the GamePP Peripheral Driver Conflict Detection Tool to identify the conflict, setting the lighting sync service to 'Manual' start and disabling background processes. This resolved the I/O bus contention. RivaTuner showed frame intervals stabilizing at 8-11ms. MemTest86 confirmed memory stability with zero errors. The game runs smooth now, and the fix preserves all visual details without sacrificing performance.