Hello,
 
Hoping some kind soul can help me with this before I go crazy. Sorry for noob GPU skills:
Recently upgraded graphics to EVGA 1070 OC ACX3.0.
I was previously running two Gigabyte GTX 570s in SLI mode.
I have a BENQ XL2420T, native resolution 1920x1080 at 120HZ which I'm running the system at.
Cant remember the motherboard by heart but can figure it out if needed.
Windows 7 64bit
 
Since upgrading I've noticed that the desktop and in particular colour palette seems lower quality than before. I do some photography in my spare time and post image processing. I've noticed that photos aren't displaying as crisply as before and with less depth in the colour with what looks like more pixelation. Its very hard to describe but its very noticeable and driving me crazy as I can't find a fix.
 
I've ensured I've got the lastest drivers (375.70) and bios for the GPU (86.04.50.00.70).
I did a clean install: uninstalled all the GTX 570s and Nvidia S/W. Then physically installed 1070 GPU with download of latest drivers and NVIDIA SW.
Connected to the BENQ through DVI (same as with the 570 SLI setup).
 
I've fiddled around with the colour management ensuring its set at 32bit True Colour. Its all setup ok.
 
At a loss now as all windows settings seem to be the same. I can only think that the following must be the issue:

• DVI output of the EVGA 1070 OC ACX3.0 is faulty?
• Some incompatibility between the EVGA 1070 OC ACX3.0 and display on the BENQ XL2420T?
• Some SLI configuration is left over somewhere causing the image to not be displayed properly?

I've attached two example screenshots that hopefully show the colour 'bleeding' that I'm seeing as its so difficult to describe. Its as if the colour palette is less than before but everything I've checked seems as it was so I just don't get it.
1st image is a screen grab from a website.
The 2nd image is a 6.55mb CANON jpeg at 5184x3456 pixels. This was crystal clear and stunning on my old setup. Now it frankly looks terrible!
 
Any help appreciated. If other config or information needed then please ask.
Ian
 
 

Welcome to the Forum --ImR--
Do a clean driver install by remove all NVIDIA Drivers and Restart the computer then use DDU to and start with Safe Mode.
This Tool DDU will restart the Computer in Safe Mode and then it will start up and click Clean NVIDIA Drivers and Restart.
You may want to install the and older version of the Graphics Drivers as well. 373.06 or even 368.81
Also are you using 8 bpc or 10 bpc under Output Color Depth in the NVIDIA Control Panel?
Did you install Display Pilot for Windows for your XL2420T
With the 1070 can you use the DP 1.2 Video Port and Cable?

Check your output mode in the Nvidia control panel, make output mode is RGB Full range: https://pcmonitors.info/a...n-nvidia-and-amd-gpus/

To be clear, screenshots would not show color bleeding since that would be a problem with your display, and screenshot just captures the pixels. We wouldn't be able to see the problem because our monitors display the screenshot properly. It might be worth it to take a picture of your monitor's display with a camera, then upload that image.

Thanks for the replies & help.
 
bcavnaugh, as you suggested:
Have done a complete uninstall of drivers, NVIDIA S/W removed.
Used DDU to clean from safe mode.
Reinstalled. 
No difference.
 
Installed display pilot for the Benq. I'm running in native resolution.
When I run the wizard, there is an issue on the resolution stage. Basically I'm not getting the full grey scale indicated as  "correct". There is some banding = "not correct" but the tool gives no solution for an issue. See photo 1. When I had the 1070 drivers uninstalled I checked this again and I was also seeing the same issue which makes me think its not a NVIDIA Driver S/W issue. 
 
When you attach a monitor via DVI cable, you don't get the options for colour depth or RGB Range (see grab 2) in the NVIDIA Control Panel. I had read up on it previously when looking for a solution, its only when connected through HDMI but thanks for those suggestions. Desktop Colour depth is at its highest (32bit). I did try connected with HDMI but I saw the same issue even with RGB at full.
 
Regarding 8 bpc or 10 bpc, is this correlated to the Desktop Colour Depth or a separate setting? I searched on the web but haven't found an easy solution to indicate what windows is currently set at? I find it weird that a high colour depth would be supported under my old SLI setup and not with the 1070?
 
Double checked physical installation of the card and cable attachments. No issues.
 
Enosoma, you are of course right, I'm an idiot. Attached a photo which hopefully shows the lack of colours and the pixelation.
 
Beginning to think it must be a H/W issue with the card. Or its running at 8bpc when it was 10bpc before.
I've ordered a DP 1.2 Video cable, will see if that makes a difference. Any other suggestions welcome and thanks again.
 

Regarding 8 bpc or 10 bpc,
I think you well see this only on the DP port but not sure.
I only have on rig running 1440P (DP Port) and it shows it, my other screens are 16:10 running 1920x1200 and they do not have this settings.
Can you test with a different Monitor, Monitors do go out.

How do I access DP port?
I've no 2nd monitor but will borrow one from work next week.
It would be a big coincidence if the monitor failed at exactly the same time as I installed a new graphics card but I guess its a possibility.
 
I've emailed BENQ support with the issue and the problem I see on their display pilot wizard page. Hopefully they can pin point where the issue might lie.
 
Thanks again.

--ImR--
How do I access DP port?
I've no 2nd monitor but will borrow one from work next week.
It would be a big coincidence if the monitor failed at exactly the same time as I installed a new graphics card but I guess its a possibility.
 
I've emailed BENQ support with the issue and the problem I see on their display pilot wizard page. Hopefully they can pin point where the issue might lie.
 
Thanks again.

You can see an image on https://en.wikipedia.org/wiki/DisplayPort Your Card as Two Ports if I recall.
Also make sure your DP Cable is VESA CERTIFIED or you may run into other issues.

Hmm, it's been a while since I've used DVI but I'm pretty sure it should be able to support 10 or 12 bpc. HDMI does and the video signalling is the same. DP will for sure. Maybe check the Windows color settings and ICC profiles. Maybe try reinstalling the monitor driver/inf.

somethingc00l
Hmm, it's been a while since I've used DVI but I'm pretty sure it should be able to support 10 or 12 bpc. HDMI does and the video signalling is the same. DP will for sure. Maybe check the Windows color settings and ICC profiles. Maybe try reinstalling the monitor driver/inf.

Some good Info Here: http://www.digitaltrends.com/buying-guides/hdmi-vs-dvi-vs-displayport-vs-vga/