How to fix USB response lag on ASRock H310CM-ITX/ac?
Missing the final hit of a critical combo because of a slight delay is absolutely lethal in a fighting game. Checking the logs, I found that the ASRock H310CM-ITX/ac USB polling rate was sporadically dropping from 1000Hz to 500Hz under high CPU load, causing input latency to swing between 8-16ms. I tried swapping between USB 2.0 and 3.0 ports, but the jitter persisted—a complete waste of time. I went into the BIOS, changed the USB mode from Auto to 'Enabled' (Forced), and disabled every single unnecessary power-saving option for the ports. Using an input lag tester, the response time tightened from a chaotic 12-22ms jump to a rock-steady 2-4ms. Interestingly, some of my older peripherals stopped being recognized after this, until I manually set specific ports back to Legacy Compatibility mode. Chipset temps stayed around 50-56℃. Verified the fix with a professional latency tool; the input feels instant now.
