Power Consumption and Noise
We'd like to cover a few final data points before bringing this article to a close. Throughout all of our benchmarking and testing, we monitored how much power our test systems were consuming using a power meter. Our goal was to give you an idea as to how much power each configuration used while idling and under a heavy workload. Please keep in mind that we were testing total system power consumption at the outlet here, not just the power being drawn by the motherboards alone.
The Radeon HD 4670's power consumption fell somewhere in between the Radeon HD 3650 and Radeon HD 3850. Despite offering somewhat better performance than the Radeon HD 3850 in most of our in-game tests, the 4670's peak power consumption was actually slightly lower than the 3850.
In terms of its acoustics, there isn't much to speak about in regard to the Radeon HD 4670. While the fan on the card does spin-up to a high speed that is easily audible during the boot-up process, the fan quickly spins down to near inaudible levels and it didn't spin up significantly during testing. We should also note that the Radeon HD 4670 is much cooler to the touch than Radeon HD 4800 series cards, which should bode well for its long term reliability.