The NG17FGQ supports HDR but does not offer any extra contrast or wide-gamut color. However, within those limitations, it processes the signals correctly.
HDR Brightness and Contrast
The NG17FGQ offers a little more light for HDR content, 296 versus the 273 nits I measured in SDR mode. This will lend a tad more punch to bright highlights but not much more than that. Black levels are about the same since there’s no dynamic option, so the contrast ratio is also similar at 1,157.1:1. HDR signals are processed just fine; there’s just not much improvement in image depth or punch. HDR looks only subtly better than SDR.
Grayscale, EOTF and Color
Grayscale accuracy is fair in HDR mode with some slight errors above 35% brightness. The picture is a little cool but not egregiously so. The luminance curve tracks a little lightly at first, then sticks close to the reference line with a soft transition to tone mapping at 60%. This is typical performance for a low output display that does not have dynamic contrast.
Color tracks very well within the NG17FGQ’s sRGB limit. When compared to DCI-P3, the points are on target until the display runs out of color just shy of 80% saturation. Hue tracks well for all six colors. HDR may not offer much in the way of a dynamic image here, but its color accuracy is very good.