Hi, I think that line about AMD not being supported at all by current Linux distros is a bit misleading, AFAIK you need to install the AMDGPU-PRO driver available on their homepage (for Ubuntu and RH). NVidia offers a more streamlined installation process for a wider range of distros.
There was one previous report on the list about an OpenCL GPU being slower than a CPU, I think that involved an old NVidia card paired with a new i7 CPU. For myself, OpenCL does speed things up considerably (old AMD Phenom II X4 810 CPU, Nvidia 750Ti card). About the memory issue: I think darktable can use multiple buffers inside OpenCL. Cheers Michael -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Gesendet: Montag, 16. Januar 2017 11:32 An: [email protected] Betreff: Re: [darktable-user] what graphics card to get? 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/[email protected] > table.org [9] http://www.darktable.org/resources/ > [10] https://developer.nvidia.com/cuda-gpus -- http://stefan-klinger.de o/X Send plain text messages only, not exceeding 32kB. /\/ \ ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected] ____________________________________________________________________________ darktable user mailing list to unsubscribe send a mail to [email protected]
