Temperatures, Cooling and Noise
The system, no doubt due in part to its ULV processor, managed to keep relatively cool during operation. Even through our strenuous torture testing, the system only got up to 96 degrees Fahrenheit on the front, though that was directly in the center of the keyboard.
On the flipside, we recorded a maximum of 98 degrees Fahrenheit, which is the coolest system we've ever had through our labs. 98 degrees, while warm, shouldn't pose any problems for direct contact unless exposed for prolonged periods of time.
The cooling system on the ASUS S56C doesn't have much heat production to cope with, but it still did an excellent job. It managed to keep the i5-3317U, and its on-board graphics chip, at a cool 72 degrees Celsius, the lowest we've recorded in the labs.
Note that the HD 4000 temperature was not actually reported. The reported CPU temperature was used as a stand-in since the two are together on a single piece of silicon in the newer Intel CPUs.
Impressively, the cooling system was whisper quiet. It was so quiet that it was hard to hear it running. We measured the sound output at a mere 36 decibels, a remarkable result. Our measurement is taken in front of the laptop at roughly head level. For comparison, 30dB is a totally quiet night time in the desert, 40dB is whispering and 60dB is a normal conversation.