Color performance CCT Corrected to D65
Since I have tested countless settings on the GP27U and tried a lot of firmware updates, I would like to finish with a CCT correction today.
OSD Setting D65 @ 200 Nits – Color Space Adobe RGB
If you buy such a monitor, you should consider to buy a colorimeter e.g. from Calibrite. Because with it you can adjust the white point (at desired brightness) perfectly and have basically a perfect monitor for all common color spaces.
I only made these changes regarding R/G/B and set the brightness to 22 to get to about 200 nits.
Gray Scale, Saturation and ColorChecker (User Settings @ Adobe RGB) CCT correction with Calman Ultimate
Fits, doesn’t it? The D65 settings also fit for sRGB and DCI-P3. A software calibration would still smooth the gamma tracking and make the avg. delta E less than one. I’ll leave that out today, because I’m convinced that only very few people need it in the end. Those who need it have the necessary tools at home to do such a calibration.
Uniformity
Except for the lower right corner, there is nothing to complain about in terms of panel uniformity. I couldn’t really notice that, but I’m not that sensitive in this respect. For me the panel looks uniformed.
Image errors
Besides the well-known IPS-typical glowing and bleeding problems (which turn out differently on every panel), flicker can occur on this monitor with HDR and VRR (G-Sync/FreeSync) enabled. I was able to make flicker visible using stress tests. Attention: A stress test is NOT the same as gaming! I could not detect flicker while gaming. But I can’t test all games just to find the error. However, I have to address it. The problem can also occur with OLED monitors. If you have problems with this, then a frame limiter helps. If you play in SDR, you won’t have a problem with flicker.
Since the monitor is not G-Sync or FreeSync certified, problems can also occur here. Thus, I could not perform my response time measurements with the RTX 4090 when I had Adaptive Sync active. As soon as I wanted to measure VRR-based, the screen blacked out. With the RX 7900XT, this worked without any problems. Likewise, a post-test showed that I could measure with an RTX 4070 without problems. Gaming with the RTX 4090 was not an issue, it worked across the entire VRR. Cooler Master has reported to me that there is some feedback regarding issues with the RTX 4090. What exactly is going on there, they could not tell me. They are looking into the cause.
Sound reproduction
The GP27U has 2x 3 watt speakers. They are nice to have, but I think that most users will rather use a headset or other solutions. The sound quality itself: It’s okay for everyday use in an emergency, but the speakers can’t really deliver bass. They are designed for mids and trebles and the level stability is so-so. Sound via 3.5 jack works!
Webcam and microphone
Are not installed. Thus, we still come to the topic of HDR.
- 1 - Introduction, Features and Specs
- 2 - Workmanship and Details
- 3 - How we measure: Equipment and Methods
- 4 - Pixel Response Times
- 5 - Variable Overdrive?
- 6 - Display Latencies
- 7 - Color-Performance @ Default Settings
- 8 - Direct Comparison
- 9 - Color-Performance calibrated
- 10 - HDR-Performance
- 11 - Summary and Conclusion
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