Review of the ASUS ROG Swift PG27UCDM – UHD QD OLED on 27 inches with high-end performance and minor weaknesses

Color performance after a full software calibration

Let’s move on to the RGB balance and full calibration. In the first step, I adjust the RGB balance, followed by the software calibration.

OSD Setting D65 @ 200 Nits

In the default settings, set the brightness to 75, the RGB settings to “User” with red 95, green 98 and blue 99. Everything else can remain unchanged. Important: activate the uniform brightness mode!

OSD Default Setting CCT Corrected @ Win 11 ACM (sRGB profiles)

 

OSD Color Space sRGB CCT Corrected

 

OSD Color Space DCI-P3 CCT Corrected

When using the Windows 11 ACM mode with sRGB profile and the sRGB mode from OSD, I was able to achieve an improvement with the CCT correction. The DCI-P3 color space in the OSD shows a known problem: the same firmware bug as with the PG32UCDM. With a manually configured white point or RGB balance, you can only work in the sRGB color space. If you also want to work in the DCI-P3 color space with the settings, you will immediately see the green cast. There’s no need for any further measurements in terms of color fidelity, that’s not going to happen! ASUS definitely needs to do its homework here.

Full calibration with Portrait Displays Calman Ultimate

 

 

 

If you have the appropriate hardware and software, you can achieve excellent results.

Uniformity

The homogeneity of the QD OLED panel is – as usual – excellent. No LCD or WOLED can keep up here.

 

Spectral distribution and “Eye-Safe”

The spectral image reveals a small surprise: instead of the usual peak at 637 nm in the red spectrum, this time it is at 457 nm in the blue range. (See e.g. article on the PG32UCDM)

Spectral distribution @ D65, 200 nits (100 % white window)

It is not possible to say conclusively whether this is already considered “eye-safe”. The blue light component can be reduced in several stages in the OSD.

Now let’s take a quick look at the HDR performance – turn the page!