Crosshair V Formula UEFI Mode

[ambi3nttech]

I am trying to install Windows 8 on my 3TB Seagate Barracuda however when I try to install I get the error "Windows cannot be installed to this disk. The selected disk is not of the GPT partition style". I think that this is because the computer has booted into BIOS mode instead of UEFI mode, however I've heard that the Crosshair V Formula boots into UEFI mode by default so my conclusion might be incorrect. If this is not true, how do I boot the motherboard into UEFI mode? I've checked the settings in the BIOS and found nothing. Any help would be appreciated.

[neyuru]

do you have the option for eliminating and formatting the disk during installation of win8? if so, that might help.

[ambi3nttech]

Yes, I've done that. I've tried formatting it as both GPT and MBR patitions however the maximum MBR partition size is 2TB, so the rest of my hard drive would be unusable.