Some temps would be nice...
I tried pushing the GPU with OpenMark, and the fans kept it below 80?C. Right now, my CPU is on ~45, and my GPU is on ~50. CPU goes to just over 80, GPU just under, before the fans bring them back down.
The GPU is the graphics processor. There is a heat sensor on the GPU, somewhere within the internal workings.
I reckon, if the components don't go far past 80?C, everything's fine.