I just ran a quick video stress test with HL 2 Lost coast, yes I know it's old .Temp went up to 47C and it got 195 fps, any better stress tests I could run to really check it out. Also I have amd fan set to quiet mode maybe I should increase speed of fan?
"Intel Burn Test" will stress your processor for shorter test period. Since you are on stock, try testing on standard setting with 5 runs (3 minutes) or on 5 runs on high (8minutes). That should give a fair indication of what highest temperature your unlocked 720BE will be at stock cooler. At stock speed, I would not worry about temperature on stock cooler even with unlocked core.