Benchmarks: Temperature and Noise
Temperatures, however, aren't a problem. The Hydro Series liquid cooler has no trouble taming the 4.7GHz chip, and this is one area in which desktop tower PCs still reign supreme: they run cool and are rarely at risk of throttling. It is highly unlikely that you would see the i7-4790K running at these speeds in a small-form-factor machine.
Better still, the low temps are made to seem all the more impressive by low noise output. The Z97 Vengeance 780 can of course be heard when it's powered on, but it generates little more than a gentle hum and doesn't get a great deal louder under load. For a high-end gaming rig, it's satisfyingly quiet.