Can't start installed uefi windows 8.1 on Asus Raidr express and P8Z68-V Pro Gen 3.

[Blindbusiness]

So, this is the problem. Every time i try to start already installed uefi windows 8.1 from the Raidr, the screen shows white line in left corner, and after 2 sec transfers to second priority boot device, which is usb flash with that windows installation... Just to be clear i tried installing windows many times, but every single time shows the same screen and transfers to second priority boot device. I tried every single manual provided by asus, or by almost all forums, but i just can't set it right. It works perfect on legacy mode.

Maybe my final question is this: Can my motherboard support raidr in uefi mode, or do i need to change it? I would really appreciate any answer, cuz i've been doing this for 2 days straight and just getting tired of it.

P.S. my other components are i7 3770k and gtx 770 ligning (in case its somehow important).

 

[popatim]

You need to have installed windows in UEFI mode for it to work in uefi mode. You do that by pressing the f-key that corresponds to 'Select Boot Device' and then chosing the UEFI option that matches your install media. in this case it would be your usb drive.

 

[Blindbusiness]

I couldn't even install windows without Boot device with UEFI mark on it. Just to make sure we are talking about the same thing, F8 is the most common button for that option. Thanks for the fast reply anyway.

 

[Blindbusiness]

Should it matter that i am holding it in a Pcie x4, and i have available Pcie x8?