How To Set CSM On Gigabyte?

To enable or disable the Compatibility Support Module (CSM) on a Gigabyte motherboard, follow these steps:

1. Access the BIOS setup:

   • Press the DEL key or F2 at the boot screen on most Gigabyte systems.
   • If fast boot is enabled, the BIOS key may not work; in that case, you can restart your PC three times in a row to boot to the recovery environment, then select "Troubleshoot > Advanced Options > UEFI Firmware Settings".

2. Navigate the BIOS menu:

   • When you enter the BIOS/UEFI setup, you might need to press F2 to switch to Advanced/Classic Mode if you're in Easy Mode.

3. Enable or disable CSM:

   • To enable CSM, navigate to the BIOS tab and set "CSM Support" to Enabled.
   • To disable CSM, switch to the BIOS tab and set "CSM Support" to Disabled; this is often a prerequisite to enable UEFI features like Secure Boot.

4. Confirm and save changes:

   • Press F10 (or the exit key indicated by your motherboard) to save the changes and exit the BIOS setup.
   • Accept the confirmation prompt to exit the BIOS and save the changes.

5. Verify:

   • After enabling or disabling CSM, check that you can boot from the intended device or that the desired features (like Secure Boot) are working properly.

If you encounter difficulties saving the CSM setting or booting after the change, consider the following troubleshooting steps:

• Conflicting UEFI features like Secure Boot, Re-Size BAR Support, or Above 4G Decoding might be enabled. Disable these settings, restart, and then try enabling/disabling CSM again.
• If the CSM setting resets to its previous state, check if your CMOS battery is healthy. If not, replace the CMOS battery.
• If your system can't boot after disabling CSM, your boot drive might be MBR-partitioned. Boot to the recovery environment and use the MBR2GPT tool to convert your disk to GPT without data loss, as indicated in the search results.
• If none of the above solutions work, consider updating your BIOS if you haven't already, as this has helped some users solve similar issues.

Remember to regularly backup your data before making substantial BIOS changes, as they can sometimes cause unforeseen problems.