The Radeon HD 5770's power consumption levels were about what we were expecting. The idle consumption was a little higher than we would have wanted, that said, with a load result of 284 watts (for the complete system) the Radeon HD 5770 uses considerably less power than the Radeon HD 4870 and GeForce GTX 260 graphics cards.

The dual slot cooler of the Radeon HD 5770 made little noise even when under load. We recorded a stress GPU temperature of 74 degrees, which is fairly low by today's standards. The idle temperature of 47 degrees was average, with many other GPUs operating cooler at idle. Still, far from a bad result.