dude, it is very rare cpu is fried. what is more likely is that the ram is having errors. if so just run a ram-checker program. also do u remember the 80:20 rule? 80% of the work is done in 20% when the rest of the 20% is done in 80%. It's called pareto! Google it!!
If you're going to take risks like overclock, you should have probably been a bit better at backing up, than not doing it ever ...