Question Bad overclocking

[sahil56]

i just tried overclock but it's gone bad than i restart my pc it's works fine afterwards when i play games in full screen the montior becomes black and says 'no signal ' and i listen background sound and freeze sound and a error sound anyone can tell me how to fix this is my graphic card broken?

 

[RARRAF]

go in the bios press DEL at boot go into system and restore bios to default

 

[sahil56]

go in the bios press DEL at boot go into system and restore bios to default

i removed cmos battery and it,'s shows restore to default when i start my pc but it's didn't fix does it different or same,?