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PS cc and 30 bit

Community Beginner ,
Sep 13, 2013

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When will PS CC have  30 bit capability? I know PS CS6 does have it so it is puzzling why PS CC does not.

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PS cc and 30 bit

Community Beginner ,
Sep 13, 2013

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When will PS CC have  30 bit capability? I know PS CS6 does have it so it is puzzling why PS CC does not.

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Sep 13, 2013 0
Sep 13, 2013

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Photoshop CC has it as well. I'm not sure why you think it doesn't.

But of course, it does require an OS, video card, and display that are capable of handing 10 bit/channel framebuffers. (MacOS still can't)

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Sep 13, 2013 0
Community Beginner ,
Sep 13, 2013

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I have all three (ASUS PA279Q monitor, AMD FirePro W5000 video card and Win 7 Ultimate 64 OS) and 30 bit does work with CS6 on my computer system. There is a 10 per bit per channel test ramp psd file (can be found on the internet) that can be opened in PS CS6 and PS CC and I have both. In PS CS6 the ramp is smooth. In PS CC the steps can be seen in the ramp. Many photographers are aware that PS CC does not work with 30 bit files. So my question is when will Adobe enable 30 bit processing? There are many of us asking this question.

Added:

It seems that PS CC can work in higher than 8 bit per channel but cannot open a psd file that has higher than 8 bits per channel and display higher than 8 bits per channel for that file.

An experiment; in PS CS6 create a 32 bit mode file and create a linear ramp from black to white. Adjust the exposure to show mostly black to mid gray. The ramp will be smooth viewed on my 30 bit monitor. If I move the PS window to either of the other two 24 bit monitors the steps in the ramp can be seen. (I should explain I have a 3 monitor system with the desktop spread across all three.)

Save the file as a psd and open in PS CC. It will be in 32 bit mode but the ramp will have the steps visible on the 30 bit monitor and 24 bit monitors. The comparison is that the same file viewed using PS CS6 has the ramp smooth on the 30 bit monitor and stepped on the 24 bit monitors. This says to me PS CC cannot display properly any opened file that contails more than 8 bits per channel (8 bit mode).

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Sep 13, 2013 0
Sep 14, 2013

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This is the first I've heard that CC doesn't work with 30 bit... because it does work with 30 bit displays.

Adobe has enabled 30 bit processing - that hasn't changed since CS6.

There is nothing else to enable - it's already there, and working.

You may have older drivers or some other problem on your system preventing it from working correctly.

But Photoshop already does what you're asking.

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Sep 14, 2013 0
Community Beginner ,
Sep 14, 2013

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I do hjave the latest drivers as I just did the installs for my new video card and monitor as well as the latest MS and bios updates. I am an electronic design engineer and have been building computers for over 40 years so I am not new to software and hardware problems.

What I am seeing is that PS CC casnnot open a psd file and display more than 8 bits per channel. PS CS6 can do this. I am not alone in believing PS CC has a problem. Several other photographers advised me of this on other forums as I was researching which monitor and card to buy.

Of course I will alway accept that my computer has a problem when I can prove it. However, too many other photoraphers believe PS CC does not work with 10 bit files.

As in my previous post, I believe PS CC can work in larger than 8 bit mode but that is not the same as opening and displaying a 10, 16 or 32 bit file correctly.. I am not alone believing this.

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Sep 14, 2013 0
Sep 14, 2013

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Photoshop CC can, and does for other users.

So there is something about your setup that is preventing the driver from using 10 bit/channel framebuffers in Photoshop CC.  You might want to contact AMD and work with them to diagnose your setup to see why it is not working on your system.

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Sep 14, 2013 0
Explorer ,
Sep 14, 2013

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It is not working for FirePro users, but it is working for Quadro users?


http://forums.amd.com/game/messageview.cfm?catid=485&threadid=167674&forumid=11

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Sep 14, 2013 0
Community Beginner ,
Dec 07, 2013

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There is definitely an issue with FirePro cards and PS CC on Windows 7 x64. I tested 10bit color when it was first introduced in CS5 a couple of years ago, when I got my first 10bit capable system - in fact I gave up trying to get it working on a nVidia Quadro card at the time and moved to a FirePro v4800 - hooked in via displayport cable to my NEC PA271 display, I was able to see the ramp.psd file (from ATI) displayed perfectly smoothly for the first time. I tested CS6 with this setup also and from what I recall, it worked fine there also. Then I tried PS CC on a trial and to my surprise, despite everything being enabled in PS CC (and with no changes to my graphics driver settings - so 10bit color still enabled), I could not get 10bit colour to work at all on PS CC. I recently upgraded my system - actually built a brand new 4th Gen i7 workstation with a FirePro w7000 GPU - and tested PS CC again after spotting this thread - and again, even though tPS suggests 10bit is supported - it just doesn't work on the FirePro w7000, despite it all being enabled, and the aero theme being switched off etc in Win7. I read on another thread that someone had received an e-mail from ATI suppoirt to say that they were working with Adobe to try to resolve this issue. Chris, can you please confirm if this is the case from your understanding?

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Dec 07, 2013 0
Community Beginner ,
Dec 07, 2013

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I spent far too much time, starting in Sept this year, with different video boards that work with 30 bit displays, newest drivers and any set up I could conceive. Could not make opening 30 bit files with PS CC work. I had discussions with engineers (not just tech support) at the board manufacturers and they are blaming Adobe for having a problem in PS CC. I finaly gave up and am waiting to hear that Adobe has discovered the problem and that now it works. Chris, simply stating that it does work is no proof or help for those of us for which is doesn't work and there are many of us. Have you tried to open a 10bit per sample file in PSCC? If you need a 10 bit per sample file I and others can provide one.

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Dec 07, 2013 0
New Here ,
Apr 15, 2014

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Chris,

I have same problem too for a long time and still waiting to be fixed by Adobe.CS6 works with 30 bit processing but CC doesn't. I read the forums for hours, I tryed every way but nothing changed. A lot of people complain about the same problem and no one knows the solution.

I tryed the ramp.psd file with Lightroom 5.4 today, and 30 bit works with even Lighroom. Can you please tell us the exact solution about this problem? Or maybe CC needs an update?

(I use Win7 ultimate, firepro V4900 by the way)

Thank you.

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Apr 15, 2014 0
New Here ,
Feb 04, 2014

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Yes, I can also state Photoshop CC (64 bit version) 30 bit color mode does not work with my Quadro K2000 card.  No issues with CS6 only CC.  Just downloaded the latest nVidia drivers today (2-4-14) and still no luck.  Not even force 30 bit color mode works in the driver option.  30 bit color is turned on in Photoshop CC.  Tested using the ramp.psd sample file.

They definitely need to issue a patch for this.

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Feb 04, 2014 0
New Here ,
Nov 09, 2014

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Just started trial of PS CC 2014.2.1 to try this out.

I have AMD FirePro W7000 (PS supported 30bit color GPU), displayport-connected to NEC pa271w (10bit capable display). My AMD graphics driver has 10bit color enabled, and in PS under preferences I have 30bit color enabled. Windows 8 x64 has the aero desktop disabled.

The ramp.psd file I obtained shows banding, so even the very latest version of PS does not display 30bit color properly on the FirePro w7000. I'm staggered that this issue has not been resolved since its introduction with the CC version of PS (as the ramp.psd file displayed perfectly smoothly when I loaded it in PS CS6).

I've kind of given up hope this will ever been resolved. I just come back here occasionally with the glimmer that there may have been some progress with this issue. Sadly none to date.

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Nov 09, 2014 0
Nov 09, 2014

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It works on the Photoshop side of things. But it does require a driver and display that are 10 bit/channel capable.

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Nov 09, 2014 0
New Here ,
Nov 10, 2014

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Chris,

Thanks for the response. As I mentioned in my post, my driver has 30bit color enabled, my w7000 GPU is connected to my 10bit compatible display using display port (required for 10bit color) and everything is enabled as it should be). As also mentioned, it worked fine in CS6 (on this same setup) - just not in CC now.

I even updated my ATI GPU driver to the very latest revision last night, but again no improvement. I even thought that the issue may be due to me having my second (non 10bit compliant) display connected to the w7000 (using DVI) at the same time as my 10bit NEC monitor, so disconnected it, rebooted, but still no joy with 10bit in PS. Then I remembered that in CS6 10bit worked fine with these same two displays connected in the same way.

So, for me I don't have a solution unfortunately. Thanks anyway.

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Nov 10, 2014 0
New Here ,
Nov 27, 2014

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Hello,

I use NVIDIA K5200 GPU. If I load the "10 bit test ramp.psd" test file, then I see strips on the image. But, when I open the Preferences menu (or hit CTRL + K), the image changes at once to normal, the strips going to disappear. I think, taht is a PS issue, and must be corrected by Adobe.

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Nov 27, 2014 0
Community Beginner ,
Dec 02, 2014

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I have been searching for a solution to the same issue since I want to get an AMD card and came across what looks like success in Re: UPDATE (All working now): PC Talk Forum: Digital Photography Review. The initial success announcement was echoed by others and I am hopeful it is resolved. I have my card on order and will be testing and reporting back.

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Dec 02, 2014 0
Community Beginner ,
Jan 09, 2015

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OK, after a brief pause for Christmas I got my new card ordered and installed and everything works fine. I ordered the AMD FirePro W5000 and downloaded the most current driver package from AMD (14.301.1010-whql-firepro-windowsx32x64-retail as of 1/7/15) and configured both the card and Photoshop CC for 30 bit (10 Bit Color Depth and Adobe Photoshop CS6 | ted lansing photography blog talks about how for CS6 and even though the PS menus have changed its close enough). A few extra details and caveat's below.

1. Windows 7 Home Premium x64 SP1 - fully up to date as of 1/7/15.

2. Adobe Photoshop CC latest (hit the Help:Updates on the menu and it came back clear)

3. I set the windows desktop to basic mode manually. Not sure if enabling 30bit on the AMD driver and rebooting did it on its own.

4. Used http://little-to-no.org/10 bit test ramp.psd (don't remember where I got it) and http://little-to-no.org/ramp.tif (made it myself from instructions in the Lansing piece above).

4. I didn't see best results until I had made a new monitor profile (thus why I was fiddling with basic mode; things were better than 8bit but not the WOW I was looking for until the new profile).

Hope this helps someone who either has an AMD card that isn't working or helps reassure someone who had read too much about how NVIDIA is the best choice for this.

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Jan 09, 2015 0
Adobe Community Professional ,
Jan 30, 2015

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I am running PS CS6 on Windows 7 SP1 64 bit with an Nvidia Quadro 600 graphics card and NEC PA272W monitor with 10-bit/color support using a DisplayPort cable. 30 bit mode works fine with the AMD Ramp.psd file you linked to above, but only at 100% view size and higher. If I select 50% view size banding appears in the Ramp.psd. It also appears if the selection tool is used on the image. That doesn't bother me, but I thought I would mention it. I've tried a "clean" install of the latest Nvidia drivers and Prefernces settings changes in PS CS6 to no avail.

30 bit display support isn't going to be of much use if it only works at 100% view size! Is anyone else experiencing this with PS CS6 or CC when viewing the Ramp.psd file at 50%?

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Jan 30, 2015 0
Adobe Community Professional ,
Jan 31, 2015

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NEC has created a '10 bit Color Depth Demo Application'' to test the 30 bit capability of your Windows system and monitor, which you can download here:

NEC Desktop and LCD Monitor Software | 10 bit Color Depth Demo Application

It works fine on my Windows 7 64 bit system at ANY image size. Increase the size of the two windows (8bit and 10bit images) so they fill your screen, which will make it easier to see banding. You can also use the 'p' key to stop the image rotation and examine the images for banding.

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Jan 31, 2015 0
Adobe Community Professional ,
Jan 31, 2015

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Windows 8.1, AMD FirePro V4900, 10 bit enabled, latest driver, Dell U2713H:

The Ramp file looks fin in CS6 at all magnifications, and with any selections.

In CC and CC2014, there is banding.

That NEC app works like a champ on my system - nice and smooth.

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Jan 31, 2015 0
Adobe Community Professional ,
Jan 31, 2015

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What PS CS6 version are you running? Mine is Version 13.0.1 x64.

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Jan 31, 2015 0
Adobe Community Professional ,
Jan 31, 2015

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Same here.

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Jan 31, 2015 0
Adobe Community Professional ,
Jan 31, 2015

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So what is causing the 50% view size image to show banding on my NEC 272W 10 bit/color monitor? The root-cause finally revealed itself after staring at the 50% view size Ramp.psd image for more than a few seconds.

Virtually all 10 bit/color monitors available today use 8 bit/color panels and advanced Frame Rate Control to create the "illusion" of two additional bits of data onscreen using temporal dithering. Early in my career I couldn't tolerate using any CRT monitor that had a refresh rate of less than 72 Hz because the flickering would drive me nuts! If you have short-persistence of vision similar to mine then you'll probably see the same banding at 50% view size in PS even with 30 bit support. As soon as the view size drops to 63% or less I can see the banding right through the temporal dithering. You can see the same effect of temporal dithering here: Screenshot-proof images via temporal dithering

The good news is there appears to be nothing wrong with the 30 bit display support in PS CS6!  Whether or not you will see this "phantom dithering" depends on how your monitor implements those 2 extra bits and/or how sensitive your eyes are to temporal dithering. Regardless of this issue an 8 bit+FRC 10/bit color monitor will provide more accurate 24 bit color images onscreen since temporal dithering won't be applied. Mac OS X user with 10 bit/color displays are still benefiting–Rejoice!

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Jan 31, 2015 0
Adobe Community Professional ,
Feb 01, 2015

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trshaner wrote:

Virtually all 10 bit/color monitors available today use 8 bit/color panels and advanced Frame Rate Control to create the "illusion" of two additional bits of data onscreen using temporal dithering.

That seems to be the case. Here's the TFT-central listing of 27" AH-IPS panels from LG Display (although no data for the last item):

ips.png

These are the panels used in all recent high-end monitors, with the exception of the CG-xx6 generation of Eizo ColorEdges, which used PLS panels from Samsung. They are probably 8 bit + FRC as well, although no information is available. Eizo just called these panels "IPS".

In fact the only true 10-bit panel in recent use that I know of, was the 24" panel more or less custom made by LG for the hp Dreamcolor LP2480ZX - at the time an extremely expensive unit. Now it can be had for only $600-ish. It also used true RGB LED array backlighting (as did the even more expensive NEC MultiSync 2180WG before that).

And to conclude this brief history, Eizo made the world's first wide gamut monitor in 2004 (CG220).

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Feb 01, 2015 0
Adobe Community Professional ,
Feb 01, 2015

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So the vast majority of 10 bit/color displays are 8 bit + FRC implementations using temporal dithering. It's surprising I'm the only one "seeing" this 30 bit display mode banding at <64% zoom view in PS CS6. I've sent the details on this issue to NEC Display Tech Support via email and should hear back from them in a few days.

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Feb 01, 2015 0
Adobe Community Professional ,
Feb 02, 2015

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I received a reply back from NEC Display Technical Support corporate team. The NEC PA272w monitor is displaying the data as output from the graphics adapter (i.e. with banding). This indicates the issue is being caused by an OpenGL incompatibility with Photoshop's Zoom scaling routine. I did a clean install with the latest version 347.25 Nvidia  drivers with no change.

Why it's only occurring at 63% and lower Zoom settings only Adobe can figure out, but at 63% Zoom setting a one (1) pixel transparent border appears around the image. At any Zoom setting above 63% this border does NOT appear. That should be a clue as to what's causing the OpenGL 30 bit display support failure!

Ramp 63 Zoom One Pixel Border.jpg

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Feb 02, 2015 0
Adobe Community Professional ,
Feb 02, 2015

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So what photo editors support 30 bit display mode and actually work? I just downloaded Zoner Photo Studio 17 free trial, which is available for Windows only. Once you enable 10-bit color depth in Settings> Preferences> Advanced and restart the application it works at ANY Zoom setting in the 'Editor' tab with no banding.

That said it's not an application I would use, but serves the purpose of proving there is nothing wrong with my system or monitor concerning support of 10 bit/color. The ball is back in Adobe's court....but I'm not holding my breath on a fix for PS CS6.

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Feb 02, 2015 0
Adobe Community Professional ,
Feb 02, 2015

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Just another little oddity to toss in: if I open the ramp.psd in CS6, viewing any one channel in isolation shows banding, but any combination of channels does not.

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Feb 02, 2015 0
Adobe Community Professional ,
Feb 03, 2015

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I've been thinking of replacing my Radeon with a FirePro, but I get the feeling it's not really worth the trouble.

Especially not with a hardware-calibrated unit like an NEC PA or Eizo CG/CX, where the 8 bits are utilized fully, coming out of a high bit monitor LUT. It might be a different matter for a video card-calibrated display, where the 8 bits are used to perform the actual adjustments. Here banding is a very real concern.

And to be honest I'm not really ready for the ugly Basic mode in Win 7 (sans Aero). I make my living through aesthetic considerations, and these things matter when I have to look at it for ten hours a day...

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Feb 03, 2015 0
Adobe Community Professional ,
Feb 03, 2015

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Semaphoric wrote:

Just another little oddity to toss in: if I open the ramp.psd in CS6, viewing any one channel in isolation shows banding, but any combination of channels does not.

On my Windows 7 system with Nvidia Quadro 600 graphics adapter NO banding is visible when viewing single-channels (Red, Green, Blue). So clearly there are differences in how PS behaves depending on graphics adapter used (AMD FirePro versus Nividia Quadro). I am sure this is also the case for WIndows 7 versus Windows 8.x versions.

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Feb 03, 2015 0
Adobe Community Professional ,
Feb 03, 2015

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twenty_one wrote:

I've been thinking of replacing my Radeon with a FirePro, but I get the feeling it's not really worth the trouble.

Especially not with a hardware-calibrated unit like an NEC PA or Eizo CG/CX, where the 8 bits are utilized fully, coming out of a high bit monitor LUT. It might be a different matter for a video card-calibrated display, where the 8 bits are used to perform the actual adjustments. Here banding is a very real concern.

Agreed. If you software-calibrate a 10 bit/color capable monitor using the graphics card's LUT all bets are off concerning reducing visible banding.

What I find ironic is that 16 bit/color printer drivers are available for Mac OS X, but no support for 10 bit/color display. Windows 7 & 8 supports 10 bit/color display path, but there are no 16 bit/color printer drivers available! As a design engineer with experience in building real-time graphics systems for NASA in the 1970s this is a sad state of affairs!

twenty_one wrote:

And to be honest I'm not really ready for the ugly Basic mode in Win 7 (sans Aero). I make my living through aesthetic considerations, and these things matter when I have to look at it for ten hours a day...

Nvida Quadro graphics adapters do NOT require disabling Windows Aero mode. In fact that was one of the issue I had trying to get 10 bit/color to work on my Windows 7 system with PS CS6. I had set the desktop to one of the "Basic" non-Aero modes and it disables 30 bit display support mode in PS CS6! At least that's the case with my PNY Nvida Quadro 600 card.

I'm not sure how much value a 10 bit/color display is unless you also have 16 bit/color printing capability. If that's NOT the case then you really want to be using 8 bit/color display bit depth same as your printer.

The biggest benefit of 30 bit capable monitors is in using an internal 12-14 bit monitor LUT for calibration to prevent quantization errors that may cause banding. In addition the 30 bit monitor's native 8/bit/color panel will have no issues with temporal dithering when viewing 8/bit color images, compared to 8/bit color monitors that use 6 bit/color + FRC panels.

To be honest I've reviewed my LR catalog for raw images that show gradient banding and haven't found one yet. I even tried some extreme LR Developsettings. We know LR only supports 8 bit/color display path so banding should be visible in some images, right? If anyone has a raw image file with obvious banding (not due to highlight clipping) they can post for download I'd appreciate it!

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Feb 03, 2015 0
Adobe Community Professional ,
Feb 03, 2015

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It's hard to be sure just what is going on, since the Histogram and Info panels only show the eight most significant bits.

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Feb 03, 2015 0
Adobe Community Professional ,
Feb 03, 2015

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The Info panel can be set  8, 16, and 32 bit, but that wont let you see the actual graphics adapter display data. Windows Print Screen (CTRL + Prt Scr keys) frame buffer is only 24 bits so that's no help either.

Without special test equipment the only way to confirm 30 bit display mode is "visually" with something like the Ramp.psd file.

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Feb 03, 2015 0
Community Beginner ,
Apr 27, 2015

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Hi there,

any news on this topic?

Who of you already tried the GPU support for Lightroom CC / 6? Does it work for you?

For me (and many others) not, just like the 30 bit in PS. So I wonder if there might be a link between these two issues - some wrong usage/interpretation of OpenGL by Adobe? Because in LR the OpenGL fails, which should be the case only for old cards not supporting OpenGL 3.3. My card however supports OpenGL 4.4, and OpenGL tests that I made with a test program finished all at 100% ok.

So, maybe a problem of OpenGL support is a common issue here? (while for me the lack of GPU support in LR is honestly a bigger problem, than 30 bit in PS)...

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Apr 27, 2015 0
Adobe Community Professional ,
Apr 27, 2015

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Please see this post by Adobe Engineer Eric Chan:

https://forums.adobe.com/message/7472605#7472605

The suggestions at this post are primarily for AMD graphics cards with numerous suggestion. Driver update or using an older version has helped AMD card users. I'm using an Nvidia Quadro 600 GPU and it is detected and turned on in LR CC 2015. Unfortunately it seems to make things slower...not faster. See my post in the same thread:

Re: OpenGL Failure in Lightroom CC

Concerning 30 bit color support: I still have the same issue with PS CS6 where it reverts to 24 bit color when Zoom view is <64% (i.e. 50%, 25%, etc.), but does work at 64% and higher. With PS CC 2014 I can NOT get 30 bit color to work at all on my Windows 7 64 bit SP1 system.

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Apr 27, 2015 0
Community Beginner ,
Apr 27, 2015

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Thanks for your input, trshaner! I was already aware of this latest advice as interim solution from another, very similar thread. However this is not valid for me, as FirePro cards use different drivers than the "mass market" Radeon cards. (And I tried with older driver with no success).

Also I already read that some things might be even slower in LR with GPU support switched on. Would still be interesting to check it on my system. Just like you I have no serious performance issues right now, beside some photos with a lot of stamp cloning, gradients etc. But as soon as LR will have to deal with 5DS R files in the future, situation might change...

However, I did not want to hijack this thread for LR topics now! Just saw a potential common reason for the issues.

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Apr 27, 2015 0
Community Beginner ,
Jun 11, 2015

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From the following page: https://helpx.adobe.com/photoshop/kb/photoshop-cs6-gpu-faq1.html

The last point under "GPU/OpenGL preferences in Photoshop CC and CC 2014" says:

"Note: 30-bit display is not functioning correctly with current drivers. We are working to address this issue as soon as possible"


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Jun 11, 2015 0
Adobe Community Professional ,
Jun 13, 2015

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Erik, it's been two days since you posted with no replies. I've given up on 30bit color support for PS due to no solution and issues with the DisplayPort connection on my NEC PA272w monitor. About every 3-4 wakes from sleep mode the monitor will not turn on and I have to manually push its power button ON/OFF. With a dual-link DVI connection the monitor behaves properly and NEC Tech Support has been unable to find a solution. I can use 30-bit color mode with other applications, just not any Adobe applications. I noticed my Nvidia Quadro 600 graphics card is not on the PS CC CC2014 Tested List, but it is on the PS CS6 Tested List. I bought this card specifically for 30bit color support with PS CS6 and it only half-works (>63% Zoom View).

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Jun 13, 2015 0
Explorer ,
Jun 16, 2015

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Jun 16, 2015 0
Adobe Community Professional ,
Jun 16, 2015

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Thank you for the EDID suggestion. If Adobe "fixes" CC 2014 30bit support it may be a good solution for the DisplayPort wake issue. I know Chris Cox keeps saying it works for some users, but not on my Windows 7, Quadro 600, with a new NEC PA272w monitor. 30bit color does work with non-Adobe applications so there's nothing more I can do on my end to "fix" it.

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Jun 16, 2015 0
Community Beginner ,
Jun 17, 2015

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I seem to get 30-bit color in CC 2015, with the same problems as you for the zoom level, doesn't work at 50%. Also it only works when no popup or similar is covering the image, like folding out the history bar breaks it, but that's documented by Nvidia that desktop composition doesn't work in Windows 7.

I tried it in Windows 10 preview and the popup composition problem is gone there, as the Windows desktop has switched to a 16 bit per channel floating point format I believe, but the Photoshop zoom has the same problem. 30-bit also seems kinda shaky in general... grayscale images for example seem to never get 30-bit color.

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Jun 17, 2015 0
Adobe Community Professional ,
Jun 17, 2015

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Erik Rufelt wrote:

I seem to get 30-bit color in CC 2015, with the same problems as you for the zoom level, doesn't work at 50%.

Actually I was seeing the break-point at 63% and below, At 54% and above 30bit color mode was working with PS CS6, but not at all with PS CC2014. I haven't tried it with PS CC2015 because I'm back to using a DVI cable due to a DisplayPort wake issue with my NEV PA272w.

Erik Rufelt wrote:

Also it only works when no popup or similar is covering the image, like folding out the history bar breaks it, but that's documented by Nvidia that desktop composition doesn't work in Windows 7.

I found that using the Marquee tool on the image will also cause it to revert to 24 bit mode (8 bit/color).

Erik Rufelt wrote:

30-bit also seems kinda shaky in general... grayscale images for example seem to never get 30-bit color.

Never tried it with a grayscale image. Did you try testing the Ramp.psd RGB test file converted to grayscale?

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Jun 17, 2015 0
New Here ,
Oct 09, 2016

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Hi there,

i purchased a EIZO CS 270 and WIN 10 64 bit, PS and LR CC.

I would like to work in a 10bit Workflow. What Graphiccard shoul i use? I could not find any new reviews about 10 bit/Channel.
Does a Quadro K420 supprt 10bit/Channel?

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Oct 09, 2016 0
Adobe Community Professional ,
Oct 09, 2016

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Oct 09, 2016 0
Community Beginner ,
Jul 29, 2015

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Hi guys,

After a lot of reading and testing I have found a solution for the 30 bit problem of PS CC 2015. Here it is:
- open the PS CC color settings (Edit->Color Settings)

- change the color engine (item "Engine") from "Adobe (ACE)" to "Microsoft ICM".

There it is, on my PC with a nVidia Quadro K2000 it worked like a charm. At every zoom factor the grey gradient is finally smooth!!!

Probably it is not a final solution, don't know how PS CC behaves by using the SO color engine instead of its native one, it could have other drawbacks, but at least we have a fast way to "proof" the image with 30 bit color.

Let me know if this works for you too.

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Jul 29, 2015 1
Adobe Community Professional ,
Jul 29, 2015

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Marco, thank you for the feedback. Looks like a trade-off of color accuracy for 30 bit color:

ICM vs ACE | The Last Word

I've switched back to using a DL-DVI cable because my NEC PA272W sometimes will not wake from sleep mode when connected via a DisplayPort cable. Believe me I've tried everything and wasted way too much time including discussions with NEC Tech Support concerning both issues (30 bit color, DisplayPort Wake). I've yet to see an actual camera image in PS that shows banding so not sure I'm missing anything at this point with only 24 bit color.

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Jul 29, 2015 0
Adobe Community Professional ,
Jul 29, 2015

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Here is a dirty little secret.

Windows 8, Win 8.1, and Windows 10 do not and all MAC OSes do not; I repeat do not support 30 bit output.

Windows 7 is the only OS that did and Aero needed to be disabled to do so. I believe Linux also supports 30 bit color output.

All the marketing hype from the Video card mfg and TV mfg is great; the problem is there is no way to get 30 bit output with the current OS es.

Sorry to burst everybody's bubble.

Sad but true.  You still using windows 7 you are still in luck.

Jim

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Jul 29, 2015 0
Adobe Community Professional ,
Jul 30, 2015

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how did you confirm Windows 8 and 10 do not support 30 bit color? Try using the below NEC 10 bit demo app or download the free Zoner Photo Studio trial.

30 bit color mode works on my Windows 7 64 bit system with PS CS6, but only at 64%-100% view. It doesn't work at all with PS CC2015 so even with Windows 7 there are still issues! It works with no issues using Zoner Photo Studio and the NEC 10 bit color demo app, which confirms my system configuration fully supports 30 bit color. 

Zoner Photo Studio 17 free trial

http://www.necdisplay.com/documents/Software/NEC_10_bit_video_Windows_demo.zip

Adobe still has this posted:

Photoshop GPU troubleshooting FAQ

Photoshop CC, Photoshop CC 2014, and Photoshop CC 2015

Note: 30-bit display is not functioning correctly with current drivers. We are working to address this issue as soon as possible

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Jul 30, 2015 0
Adobe Community Professional ,
Jul 30, 2015

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Don't care what they indicate; Windows 8, 8.1, 10 OS only support 8 bit output.

There is no OpenGL path to 30 bits on windows 8 or 8.1 or 10.  And currently PS uses OpenGL on both windows, and mac.

The only way to get deep color past the compositing is with a full screen directX surface which is not used by professional applications.

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Jul 30, 2015 0
Adobe Community Professional ,
Jul 30, 2015

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So MS Windows 8 & 10 is following in the footsteps of Apple OS X? It doesn't surprise me! What's funny (or sad) is that this is very analogous to what happened to audio technology (aka music). We went from analog LP records, 16 bit CDs, 24 bit SA-DVD, and now lossy MP3 is the most used format. It wouldn't surprise me if photography follows the same path with camera manufacturers dropping raw file format support in the next 10-20 years.

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Jul 30, 2015 0
Participant ,
Aug 05, 2015

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Is there any documentation about OpenGL and Windows 8 etc. and the lack of 10bit support? I couldn`t find anything in the web.

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Aug 05, 2015 0
Explorer ,
Oct 29, 2015

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The ICE does not work for me on latest 2015, Win 7, K5000 cards. But does on last release of 2014

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Oct 29, 2015 0
New Here ,
Dec 01, 2015

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Microsoft ICE trick works for me on Photoshop CC 2015 under Windows 10 with NVIDIA Quadro K620 card.

However, I am 100 % sure that the CS 6 version of Photoshop worked better and I did not have to use ICE color setting.

Also, Knife_Master is not right about Lightroom supporting 10-bit. Despite the fact it does dither grayscale pictures quite nicely, there is nothing 10-bit in its workflow. It's a niche thing and they can't get it right even for Photoshop. Unless 10-bit moves to consumer cards and medium priced displays, I don't think they'd bother for Lightroom. Also, you need a well-trained eye to see the difference between true 10-bit output and a well-performed dither, especially on today's high DPI screens.

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Dec 01, 2015 0
Adobe Community Professional ,
Dec 01, 2015

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malantheon wrote:

Also, you need a well-trained eye to see the difference between true 10-bit output and a well-performed dither, especially on today's high DPI screens.

As mentioned in reply #43 I haven't found a single camera or scanner image file with normal adjustments that exhibits banding with an 8bit/color display path. This probably due to the fact that every camera and scanner image has some residual sensor noise in the image even after normal Sharpening & NR processing. As mentioned this is producing dithering that helps to hide banding.

Does anyone have some example camera raw image files they are willing to share that actually exhibit banding with normal adjustments? I'm not talking about banding due to highlight clipping, just banding in normal unclipped image areas. I'd love to see some examples since I haven't found a single one to date. Thanks!

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Dec 01, 2015 0