Are you overclocked? Turn down the oc. If not, then that card is dead.
its a bit of a long shot, but are you experiencing general system instability? Your psu may be on it’s way out if that’s the case.
I’d also just like to add. Baking your gpu will in some cases just be a temporary solution. It could be true that the solder joints have cracked and you just need to reflow it.
but, it could also be the case that one or more of the caps are going bad. Heat will allow them to operate temporarily. (Think those old playstation 3’s which had the yellow light of death).
but! It could also be that your problem isn’t with the gpu at all. I suggest that you go through the basics first in the future before baking it. It would be such a waste to (potentially) damage your hardware by doing something drastic only to find out in the future that something simpler was the cause of your issue.