Quote from: MrLimitless on June 19, 2017, 07:51:48 PM

I just checked and it says my BIOS mode is "LEGACY." I'm assuming this shouldn't be the case? If so, should I reformat my SSD and re-install as UEFI.

Quote from: Vann on June 19, 2017, 03:25:38 PM

You also need to install Windows in UEFI mode:

Quote

How to test whether Windows 10 was installed with UEFI?

https://superuser.com/questions/946868/how-to-test-whether-windows-10-was-installed-with-uefi

Yes, you need to format the drive and install Windows in UEFI mode for multiple GPU's. Create a bootable UEFI Windows install flash drive using Rufus. Make sure to select UEFI partition for GPT disk from the drop down menu when creating the flash drive and boot to the UEFI installer from the boot menu.