AMD A10-7860K & Athlon 880K: Kaveri Refresh

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Energy Efficiency

When paired with the same discrete graphics card, the new AMD chips use more power than their predecessors under light load. The Athlon X4 880K's higher draw can be explained by its minimum default clock speed, 1.7 GHz rather than the usual 1.4 GHz.

Again, the AMD chips use a considerable amount of energy playing HTML5 content. The APU power figures are much closer to the average power consumption during our benchmarks than the Intel models.

Our "average" power consumption numbers are derived by assuming each CPU/system spends its time performing three activities in equal proportion: sitting idle, playing video (average of H.264/MKV and HTML5 playback), and working (average of all our benchmarks). For this usage case, the A8-7600 is quite competitive with Intel's offerings, while the A10-7860K trails slightly, and the X4 880K struggles.

To determine performance per watt, we took our relative CPU performance figures and divided it by the "average" power consumption and adjusted the scale again with the A10-7860K as our reference point.

Given their tremendous performance and superb energy efficiency, this metric puts the Intel chips in a league of their own, besting AMD's offerings by 100% or more.

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