We tested the screen of the ASUS GT750JX-T4144H, which is a TN panel of 17.3 inches with a resolution of 1920x1080 pixels. For a screen, it's important that the brightness is spread evenly in the greyscale from black to white, and that the primary colours are where they should be in terms of color fidelity.
In the grey radient you can see that the primary colors have a variance in their gamma values, but at least they're evenly spread. Their collective gamma value of 2.32 is higher than the ideal 2.2. That's due to a peak for 10 up to 90 percent white. It makes that part darker, and the step between 90 and 100 percent white is larger than it should be.
The color range of the screen is close to the sRGB spectrum, so the colors look natural. There are some minor variances, but especially for a TN panel they're nothing major. The individual brightness of colors is also good, and the DeltaE 94 values stay below 5 for the most part. These are very good values for a TN panel.
Unfortunately the color temperature is very high with 8040 Kelvin, compared to the ideal of 6500K. The maximum brightness is good at 316 cd/m². The low brightness of black creates a very good contrast of 1123:1, far higher than the typical 500:1.
Generally speaking, the screen of the ASUS GT750JX-T4144H is very good. Both the contrast and color range are outstanding for a TN panel. The viewing angles were also acceptable. While the color temperature is too high and the gamma isn't perfect, for a gaming laptop this screen is plenty good.