How to solve bus blockage on ASRock H310CM-ITX/ac?
While driving through the city, I kept getting these tiny, periodic hitches that made the open world feel choppy. I checked the logs and saw DPC latency swinging between 200-500 microseconds, which is a clear sign the bus was choked. I tried updating the GPU drivers, but that did nothing, proving the bottleneck was at the motherboard I/O level. I ended up disabling the onboard audio and turned off power management for the USB 3.0 ports to cut down on interrupt requests. The DPC latency dropped to 80-120 microseconds, and the city loading became significantly smoother. I did have a facepalm moment when I realized I'd killed my audio, but switching to an external USB DAC fixed that. CPU temps stayed between 55-62℃. 3DMark stress tests show no more bus errors, and frame times are finally locked in at 5.1-6.4ms.
