If you get a black screen after installation, the HD 4890 might be struggling with the UEFI mode on your motherboard. Ensure your BIOS is set to Legacy or CSM (Compatibility Support Module) Enabled .
Plug in the card, connect to the internet, and go to Settings > Update & Security > Windows Update . ati radeon hd 4890 drivers windows 10 64bit new
Some users find that Windows 10 blocks the older installer. To bypass this, hold Shift while clicking Restart , then navigate to Troubleshoot > Advanced Options > Startup Settings > Restart . Press 7 to disable driver signature enforcement. If you get a black screen after installation,