Power Consumption and Acoustics
Before bringing this article to a close, we'd like to cover a few final data points--namely power consumption and noise. Throughout all of our benchmarking and testing, we monitored how much power our test system was consuming using a power meter. Our goal was to give you all an idea as to how much power each configuration used while idling and while 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 graphics cards alone.
The put it simply, the new Radeon HD 5770 and HD 5750 had excellent power consumption characteristics. Both cards exhibited very low idle power, lower than any other card we tested here. And peak power consumption for the 5700 series cards was significantly lower than anything else as well.
As you probably suspect looking at the power consumption numbers, temperatures and noise were not an issue for the Radeon HD 5700 series cards either. The cooling fans on either card never spun up to levels that were audible above other system components, even after hours of benchmarking. And temperatures remained in check as well. Both cards idled at about 38'C, with load temperatures in the upper 60'C range.