CSM bios configuration details.
CSM bios configuration details.
You're using an Asus H97 board and have seen advice about switching from Legacy BIOS to UEFI via the BIOS settings. Changing from Legacy to UEFI is possible, but it depends on your current setup. If you installed Windows 8.1 after making this change, it should work as long as the hardware supports UEFI. However, ensure your system meets the minimum requirements for UEFI and that you're using compatible drivers. Always back up your settings before making changes.
It won't make a difference if you adjust your CSM settings; it might speed things up slightly by a second or two.