When recording or streaming, the video freezes and experiences frame rate drops.

1. Please confirm whether you have downloaded the latest driver (GC551_AVer_Drv_x64_V3.0.64.115)

http://storage.avermedia.com/web_release_www/GC551/GC551_RECentral_4_v4.3.0.34_18101201_x64_Drv_3.0.x.115.exe

2. Try testing with a different USB 3.0 cable.

3. Attempt to plug into different USB 3.0 ports on your computer.

4. Have you updated the USB 3.0 chipset driver to the latest version?

5. It is recommended to use the native Intel USB 3.0 host controller, and ensure that your computer has the latest driver versions installed.

6. Verify if your graphics card has the latest driver version installed.

7. Confirm that USB 3.0 hub power management is set to "Not Allow" in power-saving mode.

8. Check the power management settings in the Windows system; make sure it is set to "High Performance" instead of "Power Saver."

9. Has your Windows system recently been updated?
9-1) According to our information, Windows 10 update patches KB4100347 or KB4091663 may cause a decline in computer performance. Do you have these files on your computer?
You can go to Control Panel -> System and Security -> Windows Update, View Installed Updates -> Uninstall an Update. Locate KB4100347 or KB4091663, uninstall it, and then restart your computer.

https://www.reddit.com/r/intel/comments/99p8gu/help_after_kb4100347/

9-2) According to the information we received, the latest Windows 10 updates may cause a decline in computer performance:
The following information is for reference:

Windows 10 October 2018 Update: Uninstall, rollback, tutorial

https://www.youtube.com/watch?v=k5_FxuFtlJ8

How to uninstall and reinstall updates on Windows 10

https://www.windowscentral.com/how-uninstall-and-reinstall-updates-windows-10

10. Please make sure you have tried the above methods. If the issue persists, kindly provide us with the DxDiag for further analysis:
※ How to obtain DxDiag: [Go to the Start menu → Run → Enter "DxDiag" → Press "OK" → Press "Save All Information" → Save the file as a ".txt" file] and share it with us for further analysis of the problem.