Hi
Welcome to Microsoft community.
This is indeed a frustrating issue, especially when it affects your gaming performance. Here are some potential solutions you could try:
- Disable Filter Keys: Filter Keys is a feature in Windows that can cause delays in key response. Go to "Settings" > "Ease of Access" > "Keyboard" and make sure "Filter Keys" is turned off.
- Check for Background Applications: Sometimes, other running applications can cause input lag. Close any unnecessary applications running in the background while gaming.
- Update GPU Drivers: Make sure your RTX 4090 drivers are up-to-date. You can update the drivers through the NVIDIA GeForce Experience software or from the NVIDIA website.
- Check Your Game Settings: Some games have settings that can affect input response. Check the game's settings and try reducing the graphics settings or turning off VSync.
- Update BIOS: Updating your motherboard BIOS can sometimes resolve hardware compatibility issues. You can find the latest BIOS version on the Asus website. Disclaimer: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology. If you are going to modify BIOS Settings, please back up all your personal files first to ensure you do not lose data.
- Disable Windows Game Mode: Some users have reported input lag issues with Windows Game Mode turned on. Go to "Settings" > "Gaming" > "Game Mode" and ensure it's off.
- Check Your Internet Connection: If you're playing online, a poor or unstable internet connection can cause lag. Try connecting to the internet via an Ethernet cable if you're currently using Wi-Fi.
- Replace the USB interface and check if the problem is caused by the USB interface.
- Hardware Issues: If none of the above solutions work, there might be a hardware issue with your PC or motherboard. If you're comfortable doing so, check your hardware components to make sure everything is connected properly and working as it should.
Best regards
Derrick Qian | Microsoft Community Support Specialist