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ARTICLE
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    Knowledgebase article

    Article ID 1720
    Summary Capture One 7 and OpenCL / GPU support
    Problem How does OpenCL work, on what computers does it work and what are the benefits?
    Solution Optimal speed through OpenCL/GPU

    OpenCL is a fairly new open standard defining how to interface and utilize many processing cores with graphics cards (GPU), multiprocessor CPUs and RAM. OpenCL is short for Open Compute Language. As of June 2013, four major companies have developed drivers for OpenCL: NVidia, AMD, Intel and Apple.

    For Mac OS X these drivers are part of the Operating System, where the drivers have to be installed manually under Windows.
    The driver itself performs runtime compilation dedicated to the graphics card in the machine at hand. Only relatively new GPU cards have enough "compute power" to be utilized effectively.


    Open CL will dedicate memory to several actions in Capture One.
    The following outlines the softwares demand;
    • Preview Update with different settings, styles etc: RAM
    • Sorting/Rating: CPU cores and SSD speed
    • Fit Image to Screen: GPU cores
    • Process time: GPU processing units and CPU's and RAM


    How to enable - what to expect

    Capture One 7.x
  • Hardware Acceleration is disabled by default, and you have to turn the preferences to AUTO to start testing your hardware for compatibility
  • Much faster processing of files.
  • Overall Performance Improvement with suggested hardware


    Windows driver requirements

    • For AMD/ATI graphics: AMD Stream 2.2, Catalyst 12.10 or higher Download here pick: AMD Catalyst™ Accelerated Parallel Processing (APP) Technology Edition
    • For Nvidia graphics: NVidia Display driver version 306.97 or higher Download here pick "download".

    Limitation in functionality

    Certain Capture One settings will bypass the use of OpenCL and use the normal processing pipeline. These currently include:
    • Use of Spot Removal


    In case of problems using OpenCL

    • Turn off OpenCL in the Capture One preferences

    How to completely disable OpenCL, in case of a crash at startup

    • Windows: run the script DONOT_useopencl.reg and restart Capture One (the download also contains a restore script to re-enable OpenCL useopencl.reg) Download here
    • Mac: Run this script “ToggleOpenCL.app” - disable OpenCL and restart Capture One Download here



    OpenCL hardware support (as of June 25, 2013)
    This is an overview of the supported GPU hardware for Capture One.
    Updated list of supported cards
    NVidia:

    GTX TITAN, GTX690, GTX680, GTX670, GTX660Ti, GTX660, GTX650Ti, GTX650,
    GTX590, GTX 580, GTX570, GTX560,
    GTS450, GTS250, GT440, GT520,
    GTX295, GTX285 (Mac), GTX280, GTX275, GTX260,
    GTX750M, GTX745M, GTX740M, GTX735M, GTX730M, GTX720M,
    GTX680MX, GTX680M, GTX675MX, GTX675M, GTX670MX, GTX670M, GTX660M, GTX650M
    GTX580M, GTX570M, GTX560M, GT555M, GT550M,
    GTX480, GTX470, GTX465, GTX460, GTX450M
    GTX285M, GTX280M, GTX260M

    AMD:

    HD8000 series,
    HD7000 series,
    HD6000 series,
    HD7000M series,
    HD6000M series

    Intel:

    Iris Pro 5200 (GT3e)

    Recommended for best performance:
    NVIDIA: GTX TITAN, GTX680 (Mac)
    AMD: HD7970 GHz, GTX7950 (Mac)

  • Last updated july 9, 2013