I'm seen core temps before. It's a nice program for what it does. But all it does is monitor CPU temps. It doesn't do anything about problems as they arise.
Speedfan does though and can monitor all cpu cores if necessary.
The stress test, I've not seen that one before, though have seen others. Might be intersting.
But another point which I didn't make before is that many Graphics card now come packaged with tweeking software.
My Asus GTX 750 does, but the flip side is, while Speedfan can monitor it, I can't find a means of using it to alter the GPU fan speed. I have set requests to various sources, but have had no responses yet. I suspect not.
The tweeking software, Asus GPU Tweek sets the GUP fan to 29% by default. That is far too low for most games.