Hy guys i have a gigabyte z97-d3h motherboard. My problem is that sometimes i cannot enter bios. This usually happens when i try to overclock my g3258 and it is not stable in windows so i need to add more voltage, but i cannot enter bios. It stucks on a black screen. If i can enter it usually freezes and i can not do anything, can not move mouse or navigate with the keyboard. What can cause this problem? Other hardware issue or i need to have my mobo replaced?