Intel vs. AMD Performance-Per-Watt On Ubuntu 14.04 Linux

The next test was the C-Ray multi-threaded ray-tracer.

The Kaveri power draw was still surprisingly high and even higher than the Core i7 4770K CPU for this processor-demanding test. The overall AC power draw measured by the WattsUp meter was 119 Watts under full load while the i7 4770K averaged to 104 Watts.

With the not too great processor performance out of the four Steamroller cores on Kaveri, the A10-7850K lost in performance-per-Watt to the Core i5 4670 and Core i7 4770K CPUs. Also just ahead of the high-end Kaveri APU was the Core i7 3770K "Ivy Bridge" CPU. AMD still managed to run ahead of the i5 3470, i3 4130, and i3 2120 CPUs.