Been having problems with my X99 Sabertooth, no OC or anything but if you install a program that it doesn't like then it hangs on reboot for up to an hour. The BIOS is completely unusable when you do finally get in, once it boots into Windows though, its fine. I'm trying to install a new BIOS update to see if that will cure it but thats taking so far about 3 hours and its not even half way done. Its driving me mad, I bought this board expecting quality from Asus but its been nothing but problems from the start.
I've tried pulling parts out and trying things one at a time but it still does it. I'm thinking its time for a new board.
My system is X99 Sabertooth, 5930K, 16GB of RAM, 512GB SSD for boot drive and dual 980Tis.