Here's a summary of the information gathered so far. It's not really
exhaustive!
Patrick Rudin:
* Suggests NVidia 1050, 1050Ti or 1060.
* AMD seems not to be supported *at all* by current Linux distros.
* Would also like to know about memory requirement.
Christian Kanzian:
* cheap card can be slower than the CPU. [contradicts Guillermo
Rozas below]
* AMD Radeon R9 270X supported under Debian 8, but not any more
under Debian 9, since AMD stopped support in proprietary driver.
Planning to turn to NVidia.
Guillermo Rozas:
* runs DT on an intel i7-4720HQ notebook with an Nvidia 960M 4GB,
under Ubuntu 16.10. CUDA is fully supported by the proprietary
drivers, and DT uses the GPU without issues.
* any supported GPU will give massive performance improvement.
[contradicts Christian Kanzian above]
* get as much memory as possible [contradicts following point]
* DT cannot use buffers larger than 1.5GB [contradicts previous point]
David Vincent-Jones:
* There seems to be a problem with color management and NVidia.
Using a more current version of DisplayCAL/ArgyllCMS seems to
solve the problem.
Maybe the devs want to add some more information?
That was my original question:
On 2017-Jan-13, Stefan Klinger wrote with possible deletions:
> Hello,
>
> what graphics card to get for using Darktable with OpenCL under Linux?
>
> I already have an Asus M5A97 evo R2 mainboard, with an PCIe 2.0 x16
> slot for the graphics card. I want to stay in the price range below
> 200€. I do not play games, nor do I use 3D graphics software of any
> kind. Darktable will be the most demanding task for this piece of
> hardware.
>
> The Darktable manual mentions a minimum of 1GB of graphics memory to
> be sufficient [1]. Is this up-to-date information? Does DT benefit
> from more more? How much more?
>
> There seem to be different versions of OpenCL [2]. Is that an issue
> when deciding which card to buy? What does Darktable need here?
>
> NVidia graphics cards seem to differ in “compute ability”, which seems
> to be the CUDA version [3] they support. What is required here for
> Darktable? Is there something similar to look out for with AMD Radeon
> cards?
>
> The manual [4] mentions “recent” AMD Radeon HD7xxx to work out of the
> box. According to Wikipedia [5] that series was introduced in 2011
> and had its latest update in 2013. Also, it seems to be difficult to
> buy any of these now (I don't want to buy used hardware). Is there
> more current information available?
>
> Does anyone have information on / experience with Radeon R7 or similar
> (i.e., GCN family of cards [6])? They seem to be available for under
> 100€ currently [7].
>
> A list of NVidia GPUs with CUDA-support (I guess that's required for
> OpenCL on NVidia) is here [10].
>
> Most graphics cards I've seen are not actually built by AMD or NVidia,
> but rather by 3rd party manufacturers (MSI, ASUS, Palit, Zotac,
> Gainward, Gigabyte, PNY, ...) using their GPUs. Is there any
> particularly good / bad one to choose?
>
> What else to pay attention to?
>
> Thanks for helping
> Stefan
>
>
> BTW: The link “darktable user mailing list” [8] on [9] is outdated.
>
> ____________________
> [1] http://www.darktable.org/usermanual/ch10s02s03.html.php
> [2] https://en.wikipedia.org/wiki/OpenCL
> [3] https://en.wikipedia.org/wiki/CUDA#Version_features_and_specifications
> [4] http://www.darktable.org/usermanual/ch10s02s06.html.php
> [5] https://en.wikipedia.org/wiki/Radeon_HD_7000_Series
> [6] https://en.wikipedia.org/wiki/Radeon#Graphics_Core_Next-family
> [7] https://www.heise.de/preisvergleich/?fs=Radeon%20R7&cat=gra16_512
> [8]
> http://www.darktable.org/resources/darktable-user+subscr...@lists.darktable.org
> [9] http://www.darktable.org/resources/
> [10] https://developer.nvidia.com/cuda-gpus
--
http://stefan-klinger.de o/X
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