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Performance difference (OpenCL or not)?

RobiWan
Hi,
my graphics card is not supported by C1 and I have to work without OpenCL. I am considering now to buy another graphics card for me. For this I need to know how big the performance difference is if you use OpenCL or not?
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  • sizzlingbadger
    This will tell you where Open CL is used but not how much faster it will be.

    http://www.phaseone.com/Search/Article. ... nguageID=1


    I haven't noticed huge differences with Open CL but then I have it switched off a lot of the time as C1 seems to be a bit buggy when its on.
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  • Christian Gruner
    [quote="RobiWan" wrote:
    Hi,
    my graphics card is not supported by C1 and I have to work without OpenCL. I am considering now to buy another graphics card for me. For this I need to know how big the performance difference is if you use OpenCL or not?


    It can be a lot faster! How fast depend on your current CPU, your hard drive and so on.

    - If you have and old CPU and brand-new state-of-the-art GPU you could have up to 10-15-times the performance when processing.
    - Your hard drive can become a bottle-neck, if it cannot write the data-fast-enough.
    - With a current CPU and current higher-end GPU the difference in processing is probably around 2-5x.
    - You will also see that your Viewer will be much more responsive when making adjustments to a file.
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  • Christian Gruner
    [quote="sizzlingbadger" wrote:
    This will tell you where Open CL is used but not how much faster it will be.

    http://www.phaseone.com/Search/Article. ... nguageID=1


    I haven't noticed huge differences with Open CL but then I have it switched off a lot of the time as C1 seems to be a bit buggy when its on.


    Well, try enabling it again 😉 A lot has happened since 7.0.
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  • sizzlingbadger
    I try with each new update 😉
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  • RobiWan
    I have a new "spezial" Mac 😄

    Intel Core I7-4770K (3.9 GHz)
    32 GB RAM
    Samsung 840 EVO 500 GB
    MSI GeForce GTX 770 2GB
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  • thowi
    [quote="RobiWan" wrote:
    Hi,
    my graphics card is not supported by C1 and I have to work without OpenCL. I am considering now to buy another graphics card for me. For this I need to know how big the performance difference is if you use OpenCL or not?
    the processing speed is one thing (personally I don't care and switch Open CL off for processing). The big difference - for me - is how C1 redraws the previews. With Open CL enabled (given you use a supported, fast graphics card) previews redraw in instantly without noticable lag when adjusting an image (exposure, curve... whatever).
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