The U3224KB supports HDR10 signals through all three of its video inputs. It’s a DisplayHDR 600 screen, so it won’t quite match the searing brightness of a Mini LED panel, but it is still brighter than most OLEDs and many LCDs too.
HDR Brightness and Contrast
The U3224KB easily surpasses its 600-nit claim with almost 620 nits of total output. This was measured with a full-field white pattern. The Mini LED screens were measured with window patterns to hit their maximums. There is plenty of juice here, for sure.
A field-dimming feature lowers HDR black levels and increases dynamic range. That resulted in a respectable 12,523.2:1 score in my test. Though I found the HDR image very good, I can imagine how much better this monitor would be with a Mini LED backlight. Seriously though, it looks fantastic showing HDR video and playing HDR games thanks to its accuracy and superb color.
Grayscale, EOTF and Color
I tried all four HDR modes and settled on DisplayHDR 600 as the U3224KB’s best. The grayscale is a little warm, but the EOTF tracks well with a tone-map transition at 70%. There is some room for improvement here, so access to the RGB sliders would be welcome.
The gamut test shows a reasonable level of oversaturation in blue, magenta and red. This is typical of the wide-gamut displays I’ve tested in the DCI-P3 and Rec.2020 tests. In the latter, you can see where the U3224KB runs out of color at around 90% saturation. This is also typical performance. Hues track well in both charts and overall HDR color is well saturated with a natural look.
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