I removed the 8150 and switched it to the old 2core athlon (still having the 690 as gpu) and the shutdown disappeared when launching the games, so it looks like its the cpu's fault and not the gpu!!
I will still use the 8150 and just not play MW3, everything else works totally fine, bf3, LoL or some other *** works.
Since the problem has been found out, and the subject is the cpu, there is no longer a point having this thread about the 690 anymore.
Thanks for the help every1!!^^