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I have two monitors, a Gigabyte G27Q (new, IPS) and a BenQ GW2470 (old, VA.) I just calibrated the G27Q for the first time with my Spyder X, and found the resulting gamma to be extremely low (test charts show it in the 1.2-1.7 range.) I recalibrated my GW2470 since it has been quite a while and obtained expected ~2.2 gamma results, using the same colorimeter. The differences are very obvious looking at the two displays side by side with mid-tones being much darker on the G27Q.
I ran both calibrations again and obtained the same results. I don’t understand how this is possible since I used the same settings in DisplayCal for both monitors. Any advice would be appreciated.
SpyderX Pro on Amazon
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Also SpyyderX are not as accurate as i1d3 devices because ther limited support of colorimeter corrections.
Also make sure that you are using the proepr colorimeter correction (even limited and innacurate) bundled with Spyder. GW should be a sRGB LED => WHite LED. IDNK G27Q, if it is soem P3 gamming monitor try with WLED PFS phosphor as a “guess”.I’m not sure where to get the colorimeter correction from. If I install the Spyder software and have DisplayCal do its import, I still have no corrections listed to choose from.
Here are the charts for my most recent calibration attempts. Uncalibrated, the gamma response of the two displays seems to be pretty similar. I’ll give the PFS WLED setting a try since I used the regular WLED before.
GW2470
G27Q
It’s easier to see in a 2D plot where Y is gamma value and X is some (perhaps scaled from 0-100) value for color at LUT entry. For example on a measurement report.
You’ll have to forgive me, I’m still learning how to use DisplayCal. So strangely, if I do an uncalibrated display report, it indicates the gamma on the G27Q is 2.17, while appearing very similar visually to the calibrated GW2470. After calibration, the G27Q is noticeably darker and here are the calibration report gamma graphs:
Seem fine. Bending of gamam ear black is expected, your display has not infinite contrast, hence you have to choose the lesser evil:
-keep nominal value gamma the longest you can loosing tonal separation between greys and even grey color
-keep grey color neutral (1st), keep grey separation (2nd), keep desired gamma target (3rd)Second option is better.. and thats what you got. VA has at least twice contrast so it can keep nominal gamma value longed before bending.
Well I’m confused about two things here. Firstly, these charts are showing essentially identical gamma (other than the darkest shades, which is to be expected with the poor contrast ratio of IPS) yet visually the displays appear quite different.
Secondly, my previous TN panel monitor I replaced with the IPS did not exhibit this problem. When calibrated, it matched the GW2470’s gamma nearly perfectly. The contrast ratio is similarly low between TN and IPS so I can’t imagine that being the reason.
The only other difference I’m aware of between all these monitors is that the G27Q has a wider color gamut, but reducing the color saturation to exhibit color gamut similar to the GW2470 does not affect the calibration results.
Well I’m confused about two things here. Firstly, these charts are showing essentially identical gamma (other than the darkest shades, which is to be expected with the poor contrast ratio of IPS) yet visually the displays appear quite different.
Where? not in gamma. Maybe they have different colorspace like G7 being some P3 display. This is a totally different topic that has been addressed in lots of threads. As a summary: use GPU sRGB emulation through EDID or use saturation controls with HCFR to get a sRGB-like mode for games and not color managed apps.
Secondly, my previous TN panel monitor I replaced with the IPS did not exhibit this problem. When calibrated, it matched the GW2470’s gamma nearly perfectly. The contrast ratio is similarly low between TN and IPS so I can’t imagine that being the reason.
Explained above, not in this message but in previous one, where I’ve explained all things that may need to be corrected in GPU LUTs and usual priority: grey color, grey tone separation, gamma…. because an opposite aproximation will cause clipping.
The only other difference I’m aware of between all these monitors is that the G27Q has a wider color gamut, but reducing the color saturation to exhibit color gamut similar to the GW2470 does not affect the calibration results.
So we have the smoking gun then.
So if I’m understanding you correctly… colors (most noticeably greys) appearing significantly darker on this display post-calibration compared to other displays is not a gamma problem, but a result of wider color gamut? And I thought I was finally starting to understand some of this.
