How to fix input delay in Dead Space 2 on Maxsun B850M?
Walking through those dark hallways, I could feel a slight delay every time I clicked the mouse. It felt 'heavy' and made fighting enemies a nightmare. LatencyMon showed that the USB controller on my Maxsun MS-eSport B850M WIFI ICE was hitting DPC latency peaks of 2.5ms, which was directly tanking my FPS. I tried moving my peripherals from USB 3.0 to 2.0, but that capped my polling rate at 125Hz—totally unacceptable for a gamer. I went into Device Manager, disabled three unused USB ports, and used a tool to reassign IRQ interrupts for the NIC and GPU. After that, DPC latency stayed under 0.8ms and the lag vanished. I accidentally messed up the audio controller config during the IRQ shuffle and lost all sound until a service restart. Chipset temps are 45-52℃ and RAM is 40-44℃. Input lag tests now show the response time is back to normal.
