AMD Radeon HD 7770 and 7750 GPU Reviews
Total System Power Consumption
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 acoustics and tracked how much power our test system was consuming using a power meter. Our goal was to give you 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 drawn by the graphics cards alone.
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The new Radeon HD 7700 series cards are very power friendly, at idle (sitting at the Windows desktop), the cards consumed least amount of power of the bunch. While under load, the cards also consumed less power than every other card we tested, save for the much slower Radeon HD 6670.
With their relatively low power consumption characteristics, it should come as no surprise that the Radeon HD 7770 and 7750 put out minimal heat and are quiet as well. Somewhat surprisingly, the Radeon HD 7770 seemed to be quieter in our tested, most likely due to its larger heatsink and dual-slot cooler design. The low-profile fan on the Radeon HD 7750, while not loud by any means, produced an audible whir that was somewhat higher pitched than the Radeon HD 7770's.
