Running on battery power does not limit performance. Our Vaio is running both slower and warmer than on the Gateway even though both are utilizing the same Core i5-1235U CPU. When running Witcher 3 to represent high loads, GPU clock rate and temperature would stabilize at 848 MHz and 67 C, respectively, compared to 1000 MHz and 54 C on the Gateway Ultra Slim 14.1 under similar conditions.
The quick and steep decline in performance when running demanding loads correlates with our power consumption findings below to show that the FE14 is unable to sustain high Turbo Boost clock rates for long periods. Thereafter, clock rates and board power draw would drop to ~850 MHz and 15 W, respectively, in order to maintain a cooler core temperature of just under 70 C. When running Prime95 to stress the CPU, clock rates and board power draw would boost to 3.5 GHz and 55 W, respectively, for only the first couple of seconds until core temperature reaches 100 C.
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