Hi,
the page bellow may help you in deciding what graphics card is better in
terms of OpenCL performance: http://compubench.com/compare.jsp
I personally use an older AMD HD6850 card on the catalyst driver. I do not
observe any problem regarding the stability. Only drawback of this older
card is that despite the fact it is equipped with 1GB of RAM, only less
then half of it is available for Darktable an any other OpenCL app. The
HD77xx an higher line does not have this issue, see here:
http://devgurus.amd.com/thread/158397
Suni
2013/11/9 Magnus Berg <[email protected]>
> Hi!
>
> Thanks for your answers, they make me change my mind.
>
> On question if I want responsiveness or fast export I always prefer
> responsiveness in all computer aspekts. I chould chose a faster GPU instead
> of lots of memory.
>
> Since the AMD driver seams good - I trust you then you say so - and the
> Opencl test shoves that AMD is way faster than Nvidia I chould chose a AMD
> card. And with a very quick look I found a Sapphire Radeon HD 7970 3GB
> GDDR5 that is much faster than NVIDIA 770 and has quite a lot of memory to
> and costs quite as much as the NVIDA card I was looking at in the beginning.
>
> Thanks again for your advice.
> Magnus Berg
>
>
> 2013-11-09 08:44, Jiří Netopil skrev:
>
> Hi,
>
> the page bellow may help you in deciding what graphics card is better in
> terms of OpenCL performance: http://compubench.com/compare.jsp
>
> I personally use an older AMD HD6850 card on the catalyst driver. I do
> not observe any problem regarding the stability. Only drawback of this
> older card is that despite the fact it is equipped with 1GB of RAM, only
> less then half of it is available for Darktable an any other OpenCL app.
> The HD77xx an higher line does not have this issue, see here:
> http://devgurus.amd.com/thread/158397
>
> Suni
>
>
> 2013/11/8 Magnus Berg <[email protected]>
>
>> 2013-11-08 22:01, Togan Muftuoglu skrev:
>> > Hi,
>> >>>>>> "Ulrich" == Ulrich Pegelow <[email protected]> writes:
>> > Ulrich> Hi,
>> > Ulrich> let's hope there is a user who has tested the two variants
>> and can come
>> > Ulrich> up with some first hand experience. Else it will be
>> difficult to get a
>> > Ulrich> reco.
>> >
>> > Ulrich> As an alternative you could have a look at the many
>> graphic card
>> > Ulrich> benchmarking data available on the net. Of course
>> benchmarking
>> > Ulrich> always is a kind of black art. That said you should
>> specifically
>> > Ulrich> look for GPGPU benchmarking figures rather than the
>> classical
>> > Ulrich> gaming test suites.
>> >
>> > Ulrich> My little bit of experience comes from the phase when I
>> needed to
>> > Ulrich> decide between NVIDIA GTX 660 Ti versus AMD HD7950 (both
>> come at
>> > Ulrich> more or less the same price). I checked both devices
>> physically
>> > Ulrich> with darktable and found the NVIDIA to be a big
>> disappointment and
>> > Ulrich> the HD7950 to really rock. This was fitting well to almost
>> all
>> > Ulrich> published GPGPU benchmarks: the 660Ti is optimized for
>> gaming
>> > Ulrich> whereas the HD7950 is a monster when it comes to computing.
>> >
>> > I don't have an experience with other cards but I have Asus
>> > HD7950-DC2T-3GD5-V2 and using darktable has become really fun, as all
>> the
>> > previous time taking tasks are now done in a couple of eye blicks.
>> Probably
>> > the 16 GB ram helps also.
>> >
>> > Togan
>> >
>> Thanks for your answer.
>>
>> I read in another thread that AMD:s card was much much better on Opencl
>> than the NVIDIA ones. But that the drivers wasn't stable. And the user
>> who tell the story that AMD outperformed NVIDIA didn't recommend the AMD
>> card because of that. But if you can tell that the driver int the Linux
>> kernel is stable and good I'm more than happy to chose a AMD card.
>>
>> The question about graphic memory was based on my total lack of
>> knowledge in the graphic field. If the pictures and their different
>> changes made in Dark Table is saved in the GPU memory it must be a good
>> thing to have lots of memory there, in the same way as it is good with
>> enough ram. But if the GPU doesn't save pictures and their changes in
>> memory there can be no use with lots of memory. And it's better to chose
>> a faster GPU. That's my theory based on no knowledge at all. :-)
>>
>> Then it comes to test I must know witch tests that is relevant for
>> picture work in Dark Table. The only thing I know of Dark Tables hidden
>> life, and hove it works, is that it uses the GPU and Opencl to do the
>> work.
>>
>> Magnus Berg
>>
>>
>> ------------------------------------------------------------------------------
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>
>
>
>
> ------------------------------------------------------------------------------
> November Webinars for C, C++, Fortran Developers
> Accelerate application performance with scalable programming models.
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> from the latest Intel processors and coprocessors. See abstracts and
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techniques for threading, error checking, porting, and tuning. Get the most
from the latest Intel processors and coprocessors. See abstracts and register
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