Page 1:Asus PQ321Q: The 31.5” IGZO 4K Monitor Review
Page 2:Asus PQ321Q Packaging, Physical Layout, And Accessories
Page 3:OSD Setup And Calibration Of The Asus PQ321Q
Page 4:The Asus PQ321Q In Use
Page 5:Measurement And Calibration Methodology: How We Test
Page 6:Results: Brightness And Contrast
Page 7:Results: Grayscale Tracking And Gamma Response
Page 8:Results: Color Gamut And Performance
Page 9:Results: Viewing Angles And Uniformity
Page 10:Results: Pixel Response And Input Lag
Page 11:We’ve Seen The Bleeding Edge, And We Like It
Results: Color Gamut And Performance
Color gamut is measured using a saturation sweep that samples the six main colors (red, green, blue, cyan, magenta, and yellow) at five saturation levels (20, 40, 60, 80, and 100%), providing a more realistic view of color accuracy.
The PQ321Q’s color performance is not quite as good as what we saw in the grayscale and gamma tests. The blue/magenta/red side of the gamut is slightly undersaturated. In addition, all colors except cyan are clocked away from their targets. You can see in the luminance chart that blue, magenta, and, to a lesser extent, red are bumped up to compensate. If you check out familiar images like fleshtones and sky, they look reasonably accurate. The errors increase as you go up in saturation.
Let’s see how Asus' screen stacks up against the competition.
An average error of 2.55 Delta E is beneath the threshold of visibility, but some of the problems at higher color saturations can be seen by the naked eye. The range of values is .47 to 7.53 Delta E. We’d prefer to see greater consistency in a monitor selling for $3499.
Gamut Volume: Adobe RGB 1998
There are basically two categories of displays in use today: those that conform to the sRGB/Rec 709 standard like HDTVs, and wide-gamut panels that show as much as 100 percent of the Adobe RGB 1998 spec. We use Gamutvision to calculate the gamut volume, based on an ICC profile created from actual measurements. The chart shows the percentage of both sRGB and Adobe RGB 1998 gamuts.
The PQ321Q is a Studio RGB-only display. It is accurate enough for professional use, but many will prefer the wider Adobe RGB 1998 gamut available in screens like Asus' PA279Q. We’re sure it’s only a matter of time before an Ultra HD panel becomes available in wide-gamut form. For now, we have to be satisfied with a monitor that looks great in gaming and multimedia applications.
- Asus PQ321Q: The 31.5” IGZO 4K Monitor Review
- Asus PQ321Q Packaging, Physical Layout, And Accessories
- OSD Setup And Calibration Of The Asus PQ321Q
- The Asus PQ321Q In Use
- Measurement And Calibration Methodology: How We Test
- Results: Brightness And Contrast
- Results: Grayscale Tracking And Gamma Response
- Results: Color Gamut And Performance
- Results: Viewing Angles And Uniformity
- Results: Pixel Response And Input Lag
- We’ve Seen The Bleeding Edge, And We Like It