Articles: CPU

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Power Consumption

As our tests showed, the Kabini series doesn’t perform consistently. We can’t say that they are superior to Intel’s energy-efficient solutions. Yes, they are faster in certain applications like final rendering or video transcoding, but such applications are not typical of entry-level computers. And when it comes to office or home applications, the Socket AM1 processors turn out to be slower than the Celeron J1900 or Celeron 1037U.

Processors of the Kabini’s class are expected to be highly energy efficient. The Jaguar microarchitecture is optimized for low power consumption, so Jaguar-based processors are even employed in tablets. That’s why we can hope that the Socket AM1 platform is competitive at least in terms of power draw. Let's check this out right now.

The graphs below (unless specified otherwise) show the full power draw of the computer (without the monitor) from the wall socket. It is the total power consumption of all system components. The PSU's efficiency is taken into account but our Corsair AX760i is a highly efficient 80 PLUS Platinum product, so its effect on the result is very small. The x86 cores are loaded by running the 64-bit version of LinX 0.6.4 utility. The graphics core is loaded by running Furmark 1.13.0. We enable all power-saving technologies to correctly measure the computer's power draw: Intel’s C1E, C6, Enhanced Intel SpeedStep and AMD’s Cool’n’Quiet.

It is system-on-chip platforms that are ahead in terms of idle power consumption. Featuring a single-chip design without additional chipsets, they ensure high energy efficiency in idle mode. So, the Socket AM1 platform seems to be quite economical.

The desktop Kabini doesn’t look so well at high computing load. The Athlon 5350 is less economical than the Celeron 1037U or Celeron J1900. It only needs less power than the regular desktop processors which deliver much higher performance.

The Kabini’s integrated graphics core is economical. It is a shame that its performance is too low for gaming. Otherwise, it would be a far more capable processor.

Interestingly, the Athlon 5350 needs about the same amount of power as the Celeron 1037U when x86 and graphics cores are all in use. It’s because the Intel HD Graphics is less energy efficient than the Kabini’s GCN graphics. The Celeron J1900 (Bay Trail) is the winner of this test, though. It allows building a desktop PC with a peak power draw of 35 watts. Even the junior quad-core Kabini, Sempron 3850, needs 10 watts more under the same conditions.

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