To read about our monitor tests in-depth, please check out Display Testing Explained: How We Test PC Monitors. We cover brightness and contrast testing on page two.
Uncalibrated – Maximum Backlight Level
In the GP27U’s User 1 mode, I measured a peak white level of 451.8933 nits, more than enough for any work or play environment. The backlight can be adjusted over 100 steps, but 200 nits was setting 24, which means the minimum is a bit high at 64 nits. That’s a reasonable level for darkroom use. My only actual complaint is that below 200 nits, each click of the slider drops brightness by 3-5 nits. That’s a bit coarse for my taste. I would prefer to see finer control.
Black levels are IPS average, so the contrast is also average at 920.3:1. Local Dimming is available for SDR signals, increasing dynamic range significantly. Even on the Low setting, I couldn’t measure black, so contrast can be theoretically infinite.
After Calibration to 200 nits
Calibration improves contrast slightly to 991.1:1, moving the GP27U up to fourth place. Again, this is average IPS performance. The Samsung is well ahead of the pack because its local dimming is always engaged and cannot be disabled.
The GP27U maintains its contrast ratio in the ANSI test, which speaks to its engineering and construction. The grid polarizer is precisely fitted, maintaining high intra-image contrast and a sharp image.
MORE: Best Gaming Monitors
MORE: How We Test PC Monitors
MORE: How to Buy a PC Monitor: A 2022 Guide
Newegg has since changed the link to a different product. The Aorus FO48U monitor.
Samsung's QD-OLED (which that Alienware uses) has a lot of artefacts and color fringing issues.
Just search "color fringing qd-oled" and you'll get hundreds of people pointing out the issues with QD-OLED.
OLED has this problem in general, but it is worse on the QD-OLED from samsung.
In every game with text, the color fringing of QD-OLED and OLED, IS a major issue.
Monitor makers are trying to damage control this issue, but when people are paying so much money for an OLED monitor and they realize OLED tech has color fringing issues that even $100 VA or IPS panels don't have, that leaves a very sour taste in people's mouth.
The color fringing is also an issue with high contrast UI elements.
Not with firmware update from December 2022.. :
Adaptive Sync (VRR) and Local Dimming can now be enabled together.Fixed some instances where the KVM would not automatically switch to a new signal input.
More overall flexible color adjustments in all picture modes.
Enabling Adaptive Sync will no longer limit the refresh rate to 144Hz, and instead works up to 160Hz (both HDMI 2.1 and DP).