Page 1:Asus ROG Swift PG278Q G-Sync Monitor Review
Page 2:Gaming Features: G-Sync, Fast Refresh, ULMB and GamePlus
Page 3:Packaging, Physical Layout, And Accessories
Page 4:OSD Setup and Calibration of the PG278Q
Page 5:Measurement And Calibration Methodology: How We Test
Page 6:Results: Brightness and Contrast
Page 7:Results: Greyscale Tracking and Gamma Response
Page 8:Results: Colour Gamut and Performance
Page 9:Results: Viewing Angles and Uniformity
Page 10:Results: Pixel Response, Input Lag and Blur Reduction
Page 11:ROG Swift PG278Q, A Display Technology Revolution
Results: Greyscale Tracking and Gamma Response
The majority of monitors, especially newer models, display excellent greyscale tracking (even at stock settings). It’s important that the colour of white be consistently neutral at all light levels from darkest to brightest. Greyscale performance impacts colour accuracy with regard to the secondary colours: cyan, magenta, and yellow. Since computer monitors typically have no colour or tint adjustment, accurate greyscale is key.
User is the default colour temp mode and it’s pretty close to correct. The RGB Balance chart shows a tendency towards red, but all of the errors are under three Delta E and therefore very hard to see. Even still, we observed an improvement after calibration.
Adjusting the RGB controls gives us a better result that is now under two Delta E across the board. You give up a tiny bit of contrast, but we think it’s worth it.
Here is our comparison group:
A Delta E measurement of 2.42 puts the PG278Q near the top in out-of-box greyscale performance. In fact, its result exceeds a few professional-class monitors we’ve tested. We feel most gamers would be satisfied with the Swift in its uncalibrated state.
A little adjustment brings the average error down to 1.27 Delta E. The improvement in image quality is noticeable to our eyes. When you always use a calibrated monitor, a display with even a tiny error doesn't look quite right. Today though, the greyscale prize goes to BenQ's XL2720Z with its stellar numbers.
Gamma is the measurement of luminance levels at every step in the brightness range from 0 to 100 percent. This is important because poor gamma can either crush detail at various points or wash it out, making the entire picture appear flat and dull. Correct gamma produces a more three-dimensional image, with a greater sense of depth and realism. Meanwhile, incorrect gamma can negatively affect image quality, even in monitors with high contrast ratios.
In the gamma charts below, the yellow line represents 2.2, which is the most widely used standard for television, film, and computer graphics production. The closer the white measurement trace comes to 2.2, the better.
The gamma tracking runs just a tiny bit light at an average value of 2.15. It’s only slightly off of our standard and again, most users won’t notice. We do wish there was a gamma adjustment, however. Some games benefit from a little lighter or darker tone to help bring out detail. Fortunately, many developers add a software-based slider to compensate.
Here is our comparison group again:
The difference between the highest (2.29) and lowest (2.07) values is pretty small, indicating good tracking. There aren’t any significant dips or peaks to spoil the result.
We calculate gamma deviation by simply expressing the difference from 2.2 as a percentage.
A 2.15 average puts the PG278Q in fifth place among today’s group. Overall, we’re perfectly satisfied with its gamma performance. Our only beef is the lack of additional presets.
- Asus ROG Swift PG278Q G-Sync Monitor Review
- Gaming Features: G-Sync, Fast Refresh, ULMB and GamePlus
- Packaging, Physical Layout, And Accessories
- OSD Setup and Calibration of the PG278Q
- Measurement And Calibration Methodology: How We Test
- Results: Brightness and Contrast
- Results: Greyscale Tracking and Gamma Response
- Results: Colour Gamut and Performance
- Results: Viewing Angles and Uniformity
- Results: Pixel Response, Input Lag and Blur Reduction
- ROG Swift PG278Q, A Display Technology Revolution