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Maximus VI formula CSM legacy mode?

jpomz
Level 7
Hello, I've got a maximus VI formula, but for some reason it always needs to boot in legacy mode, and I can't figure out why.

I installed windows 7 in UEFI mode, and updated my bios, but it still won't boot unless in legacy mode.

My system specs are as follows.

Maximus VI formula

i7 4770k

Gtx 770 directcu2 x2

16 GB corsair dominator

240gb intel 530 series SSD

1TB WD black

The motherboard makes me load the legacy stuff for my pci-e cards, but don't the gtx 770's support UEFI?

I even flashed the latest BIOS onto the motherboard.

Does anyone know what could be causing this?
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HiVizMan
Level 40
Indeed you do need Win8
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