I'm getting bus congestion and lag during large map loads in Battlefield V on a Colorful H610M-K, how do I fix this?

While moving through the map, I kept getting these rhythmic micro-stutters that are absolutely lethal in a shooter. I checked the LatencyMon logs and saw DPC latency spiking between 250-550 microseconds—clearly a bus bandwidth issue. I tried updating GPU drivers, but nothing changed, confirming the problem was at the motherboard I/O level. I disabled the onboard audio and turned off power management for the USB 3.0 ports to reduce interrupt requests. In the performance panel, DPC latency dropped to 90-130 microseconds, and the game finally felt fluid. I accidentally muted my audio when disabling the onboard chip, but switching to an external USB DAC fixed that. CPU temps stayed at 58-65℃. 3DMark stress tests show zero bus errors, with frame times stable at 5.1-6.4ms.