If you're going to deliberately make your computer run full pelt for the surplus heat, you might as well do something useful with it - eg, you could run Folding

If you're going to deliberately make your computer run full pelt for the surplus heat, you might as well do something useful with it - eg, you could run Folding@Home or some BOINC project, burn those cycles for a good cause. Or, if you'd rather get something out of it for yourself, you could mine cryptocurrency.