I know you used your own equipment to test for PWM, which I appreciate. You detected none. However, the AUO B156HAN01.2 display is listed using 200-10k Hz PWM in it's official data sheet, found here:
Hi, thanks for the article as always, a great site for notebook reviews, but there is a mistake I think you've made regarding the GPU core clock during Heaven Benchmark. You say that it stabilizes at 1253Mhz, but in actual fact the graphs are showing a stable clock of 949Mhz which actually is the exact same clock that you are seeing in the Furmark stress tests too. The 1253Mhz that you mention is actually the memory clock, not the GPU core clock.