Web Driver with Mac Pro

Hi,

I installed a graphics card in my Mac Pro 3.1 with the Web Driver 346.XX and every time I turned off the Map he always returns to the OSX option.

Card : Asus Turbo GTX 970 4GB

I found solution with Clover EFI on TonyXmac, i don't have time for try.

Anyone know solution for me? I do not just leave it on at all times ..

Thanks You.