Resource scheduling and IRQ optimization for ASRock Z370M Pro4
When you're building fast, that flow state is everything, but the input lag on this board was completely killing the vibe. The USB controller on the ASRock Z370M Pro4 was causing massive DPC latency, peaking at 2.8ms, which led to those annoying micro-stutters in frame rate. I first tried swapping from a USB 3.0 to a 2.0 port; the latency dropped a bit, but my peripheral polling rate got capped at 125Hz, which is unacceptable for competitive play. I eventually went into Device Manager, disabled three redundant USB ports I wasn't using, and used a tool to reassign the IRQ interrupts for the NIC and GPU. LatencyMon showed the DPC latency dropped below 0.6ms, and that heavy input feel vanished. I did accidentally mess up the audio controller config while tweaking the IRQs, which left me with no sound until I restarted the services. Chipset temps stayed at 42℃ - 50℃ and RAM at 38℃ - 44℃. Input lag tests confirm it's back to normal. Mode switched.
