Temperature
Asus has also used the redesign to improve the cooling solution; the results are much better compared to the predecessor, although the warming of the Asus N750JK has already been quite low. The Asus N751JK-T4144H with a faster processor and a higher ambient temperature is even cooler under load with up to 41.3 °C (~106 °F) at the bottom and up to 38.1 °C (~101 °F) at the top. This means the maximum temperature has been reduced by 8 °C (~15 °F) at the top, which is quite impressive. The temperature at the bottom is also 2.9 °C (~5.5 °F) lower compared to the predecessor. The only drawback is the slightly higher temperature on the palm rest of the Asus N751JK-T4144H, but up to 31.6 °C (~89 °F) is only going to be an issue for very temperature-sensitive users. The idle temperatures are slightly lower as well and once again, the warming is hardly noticeable.
A comparison with the other devices shows that the Asus N751JK-T4144H is definitely one of the coolest devices in this category. Only the HP Envy 17 with a low voltage processor manages slightly lower temperatures.
We simulate maximum load for the graphics card and the processor with the stress test and the device stays quite quiet and does not really get warm, either. The GPU temperature of around 60 °C (~140 °F) is tolerable, but the CPU quickly reaches temperatures above 80 °C (~176 °F) and then throttles the Turbo clock to a minimum value of 2.4 GHz. The clock of the GeForce GTX 850M drops significantly quite quickly and runs with only 135 MHz, so gaming is hardly possible. The situation does not change when we only stress the graphics card with FurMark, and it corresponds with our problems in some games. We hope that this is a driver issue that can be fixed with an update, but it still affects our rating.