Why you can trust 3DTested Our expert reviewers spend hours testing and comparing products and services so you can choose the best for you. Find out more about how we test.
Our HDR benchmarking uses Portrait Displays’ Calman software. To learn about our HDR testing, see our breakdown of how we test PC monitors.
The EX271UZ carries a VESA DisplayHDR 400 True Black certification and supports HDR10 signals with an automatic switch. You get four specific modes, which include some adjustability.
HDR Brightness and Contrast
The EX271UZ has average brightness when compared to other DisplayHDR 400 screens. I achieved this result by measuring a 25% window so you can expect small highlights of 3% or less to be closer to 700 nits. I noted that the best mode, Display HDR, allowed changes to peak brightness, something few OLEDs offer. I also noted that Local Contrast was only available in the interpretive modes. This wasn’t an issue for me as I preferred that option turned off.
Grayscale, EOTF and Color
Display HDR is by far the most color-accurate HDR mode. Grayscale tracking is better than nearly any other HDR monitor with all errors below 2dE. The EOTF tracks slightly dark, but not enough to obscure fine shadow detail. It makes a smooth transition to tone mapping at 60% brightness, the correct level given the measured white and black levels.
In the color test, there is slight oversaturation, as with nearly all HDR monitors, which gives the image some added punch without a visual penalty. The EX271UZ uses its large gamut to full effect here. In the BT.2020 test, it reaches 90% red, 75% green, and 95% blue. This is excellent performance.
Test Takeaway: The EX271UZ embraces HDR content with terrific contrast, a bright textural picture, and accurate color. There’s plenty of saturation to differentiate HDR from SDR, and you get the bonus of adjustable brightness. This is a standout HDR display.
MORE: Best Gaming Monitors
MORE: How We Test PC Monitors
MORE: How to Buy a PC Monitor
