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Dell S2716DG 1440 144 Hz G-Sync Owners Thread - Page 180

post #1791 of 4833
What I later discovered ToKuten was that lowering the gamma and not adjusting the other settings (nVidia control panel brightness/contrast) causes a bunch of the darkest shades of gray to simply be black, which equates to some detail being lost. While it might ultimately look good enough that way, a part of me cringes at the thought of lost minute details, when my cheap laptop can handle it. Even this monitor can handle it from what i've seen via messing with the limited color range option I wrote about recently. It seems to me that nVidia has f'ed up on how their software processes the color option settings(although I see it with ICC too so it's really the driver code), which means that good calibration at the factory is exceedingly important for those using nVidia cards.

Further I strongly feel a talented registry/hex editor could find the right bit to change to enable the dithering you can see when messing with the color range option. This ability can also be seen in Linux from what I was reading, and easily turn on or off, but no such option exists in the control panel UI. Sadly I am not that person, and so that leaves me with the question of my priorities (since I can still return the item to bestbuy). It's a bit infuriating since this is ultimately just a software problem, and not a hardware problem, so it's hard to fault Dell (other than the bad factory calibration). I have until the 2nd to decide or find a software solution.
post #1792 of 4833
Sorry but i am a noob and didn t understand a lot of what u are trying to explain me biggrin.gif
I don t even know if i increase the gamma or decrease when i move the value on nVidia control panel, your gamma was lower than me but i used the ulmb mode that s why i modified it .
I am just reporting the feeling when i use the monitor with all setting shared by users, thanks to the amazing community !
i just found to be eye-burning when you read the forum with Brightness 45, Contrast 70 without ulmb activated.
post #1793 of 4833
Quote:
Originally Posted by BrightShadow View Post

I have a pretty good understanding of color calibration now. Reading this thread here:http://hardforum.com/showthread.php?t=1873362 It seems that the ATI/AMD driver software does calibration at the 10bit LUT level, then dithers to 8bit and looks perfect, whereas the nVidia software doesn't use any dithering. That's why I hold out some hope that forcing 10bit in the driver could fix the issue.

Interesting read thanks for that link.
post #1794 of 4833
Quote:
Originally Posted by ToKuten View Post

Sorry but i am a noob and didn t understand a lot of what u are trying to explain me biggrin.gif
I don t even know if i increase the gamma or decrease when i move the value on nVidia control panel, your gamma was lower than me but i used the ulmb mode that s why i modified it .
I am just reporting the feeling when i use the monitor with all setting shared by users, thanks to the amazing community !
i just found to be eye-burning when you read the forum with Brightness 45, Contrast 70 without ulmb activated.

try yellow's profile, guide to install is in his post

http://www.overclock.net/t/1577511/anyone-else-excited-for-the-dell-s2716dg-monitor/1570#post_24781436

for some reason his osd settings are posted here:

http://www.overclock.net/t/1577511/anyone-else-excited-for-the-dell-s2716dg-monitor/1710#post_24831226

this is his report:

http://www.overclock.net/t/1577511/anyone-else-excited-for-the-dell-s2716dg-monitor/1750#post_24836787

If you can wait a few hours I will have one myself. I keep everything in one folder so no need to go hunting for stuff. This thread really is a mess. The OP should have all profiles so it stops new people asking the same questions over again.
post #1795 of 4833
Quote:
Originally Posted by majnu View Post

Interesting read thanks for that link.

Your most welcome. I just wish it wasn't the truth lol. But I do feel certain there could be a simple fix, if the control panel UI had an element for that missing dithering option.
post #1796 of 4833
Quote:
Originally Posted by majnu View Post

try yellow's profile, guide to install is in his post

http://www.overclock.net/t/1577511/anyone-else-excited-for-the-dell-s2716dg-monitor/1570#post_24781436

for some reason his osd settings are posted here:

http://www.overclock.net/t/1577511/anyone-else-excited-for-the-dell-s2716dg-monitor/1710#post_24831226

this is his report:

http://www.overclock.net/t/1577511/anyone-else-excited-for-the-dell-s2716dg-monitor/1750#post_24836787

If you can wait a few hours I will have one myself. I keep everything in one folder so no need to go hunting for stuff. This thread really is a mess. The OP should have all profiles so it stops new people asking the same questions over again.
yeah read all of them even yellow 180 pages today smile.gif thanks again
I have downloaded your 2 versions of ur icc biggrin.gif
Edited by ToKuten - 1/28/16 at 4:51pm
post #1797 of 4833
Quote:
Originally Posted by ToKuten View Post

yeah read all of them even yellow 180 pages today smile.gif thanks again

and is your screen still too bright with his settings?
post #1798 of 4833
Quote:

The OSD settings were in the original post in the download description (it's the tooltip). I'm quite new to these forums so I thought it'd be more visible wink.gif
Quote:
Originally Posted by majnu View Post

If you can wait a few hours I will have one myself. I keep everything in one folder so no need to go hunting for stuff. This thread really is a mess. The OP should have all profiles so it stops new people asking the same questions over again.

Yeah... but it's a very helpful mess, I've learned a lot from this smile.gif
post #1799 of 4833
Quote:
Originally Posted by majnu View Post

and is your screen still too bright with his settings?

i haven t tried any icc files yet, but without, yes too bright frown.gif


Will try to resume all tests tomorrow, without icc profile for brightness issue on desktop use (white page) but mostly it s:
ulmb ON with 50 brightness and 100 pulse width
or
g-sync ON with 15/25 (no more) brightness.

since today, i prefer ulmb ON for desktop work (word, excel, browsing, not talking about photoshop since i am not working on it.)

Before i was working on laptop 15' wxga or lcd 17' and never had this headache, until i found it, the brightness was the primary cause before the size of letter on google chrome.
Edited by ToKuten - 1/28/16 at 5:09pm
post #1800 of 4833
Quote:
Originally Posted by BrightShadow View Post

Your most welcome. I just wish it wasn't the truth lol. But I do feel certain there could be a simple fix, if the control panel UI had an element for that missing dithering option.

After reading a lot about this issue and reproducing it on all my monitors, it seems that the more gamma correction is applied the more banding appears. Which is as it should be based on how this works (the LUT being processed at 8-bit precision with rounding and no dithering). It is very unfortunate and a clear win for AMD.

I understand what you were writing about more clearly now - the issue with banding on lagom.nl's test. I'm sorry for misunderstanding smile.gif

I'm wondering though about ReShade and it's use of a software 3D LUT instead of reliance on the 1D LUT in the GPU. A 3D LUT is inherently more precise than the 1D variety. Shaders use 32-bit floats to perform calculations and it's the GPU's job to convert that to whatever format was used for creating the D3D context. It would usually get converted to 8bpp, how? that's the driver's secret... But according to that thread when a DX fullscreen application outputs >8bit then nVidia is actually dithering.

If I understand correctly then using ReShade in games should yield less banding when compared to the broken colour profile support in the desktop.

So we could actually test this. If we had a ReShade 3D LUT based on the same calibration as the desktop ICC we can compare it's effectiveness in a game using an exclusive fullscreen mode with windowed mode.

dispcalGUI by default creates the 3D LUT with 2.4 gamma instead of 2.2, so that might be a problem as well.

I'll try to do a few tests soon, since this is fun again wink.gif
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