AsRock x370 Taichi Weird characters and split screen at bios time only

amitkarmakar13

Commendable
Apr 26, 2016
3
0
1,510


This problem happens only during the boot device selection menu. In BIOS setup everything runs fine. Also, after i disabled CSM, this problem doesn't occur. (Except that I see 3 blank entries in the boot options list)

Hoping GPU is not faulty.