KitGuru KitGuru.net – Tech News | Hardware News | Hardware Reviews | IOS | Mobile | Gaming | Graphics Cards
HDR Testing
Following on from the SDR results on the previous page, here we re-test the relevant areas of the display with HDR enabled.
Brightness
Just like the 321URX, by default the 271QRX defaults to the True Black 400 mode when HDR is enabled. This limits brightness in HDR mode to about 460 nits, which is sustained up to a 10% APL, after which brightness slowly declines until it hits a full screen figure of 273 nits.
There is, however, a Peak 1000 Nits mode too, which I personally prefer. This mode is pretty self-explanatory, as it delivers a peak of just over 1000 nits for 1% and 2% APLs, before dropping off as the window size increases.
The difference between the two modes other than brightness is quite hard to spot. RGB balance is very similar, as is greyscale dE. There is just a tiny difference in the EOTF tracking, with the HDR Peak 1000 mode rolling off slightly early compared to the True Black 400 mode – something we also observed with the 321URX – but both are generally accurate and don't pose any headaches for use with HDR content.
Colour accuracy with HDR enabled is also very similar between the two modes, each deliver average dEs of around 2.4-2.6. As we'd expected, the least accurate results are for the 100% cyan and 100% green channels, which the monitor can't display accurately due to its sub-100% coverage of the Rec.2020 colour space.
