Dealing with interrupt latency on GALAX B760M D4 White Phantom
Every time I hit the jump button, there was this tiny, infuriating hitch. In a precision emulator, that kind of input lag is a complete nightmare and had me seriously anxious. I found that the USB controller on the GALAX B760M D4 White Phantom was generating massive DPC latency, peaking at 2.8ms, which caused the frame times to jump all over the place. I tried switching from a USB 3.2 to a 2.0 port, but that capped my controller polling rate at 125Hz, which was a total dealbreaker. Instead, I went into Device Manager, disabled three unused redundant USB ports, and used a tool to reassign the IRQ interrupts for the NIC and GPU. LatencyMon showed the DPC latency dropped below 0.7ms, and the lag vanished. I actually accidentally nuked my audio driver config while messing with the IRQs, leaving me in total silence until a service restart fixed it. Chipset temps are 42-50℃ and RAM is 38-42℃. The controls now feel incredibly responsive and snappy.
