AMD A10-7890K 95W Flagship APU

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Energy Efficiency

When paired with the same discrete graphics card, the new A10-7890K uses 1W more than the A10-7860K under light load. Both the A10-7890K and X4 880K have a higher minimum default CPU clock speed than previous APUs, 1.7 GHz rather than the (previously) usual 1.4 GHz, yet the 7890K's power draw is reigned in somewhat.

Again, the AMD chips use a considerable amount of energy playing HTML5 4K content versus Intel's offerings. This task is so demanding, the power figures for the APUs are close to that of the average power consumption during our CPU benchmarks.

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 A10-7890K is on the high side, drawing 8W more than the A10-7860K.

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 A10-7890K as our reference point.

The A10-7890K's power consumption is proportionally high relative to its CPU performance, so its less efficient than the slower A10-7860K and A8-7600.



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