Hi,
Currently GPU acceleration is not used. Maybe some plugins can use it but I
have not seen anything yet. I have put in a request to use GPU for the qgis
3.0 raster calculator as it needs to be upgraded for huge rasters. Currently ,
the qgis raster calculator can not handle big rasters. The new version needs
to break up the raster into smaller chucks and if you have done that, you might
as well use the multi CPU ou GPU to do the rest. I an hopping this will be
fixed for 3.0. Rendering is multithreaded and will be faster the more cores
you have. Personally, I would go for the quad core without even thinking for
this and other softwares. I would think of getting an ssd also. I have not
used qgis on a MAC (PC and ubuntu only) but I expect this comment to be valid
for Macs also.
Nicolas
> Le 7 nov. 2016 à 11:12, Matthias Kuhn-2 [via OSGeo.org]
> <ml-node+s1560n5294662...@n6.nabble.com> a écrit :
>
> Hi
>
> On 11/07/2016 05:02 PM, Square Cube wrote:
> >
> >
> >> I am looking to update some hardware and am trying to evaluate what
> >> performance difference in QGis might be gained from the options
> >> currently on offer from Apple. I have two specific questions:
> >>
> >> - Does QGis have GPU acceleration features that leave the graphics
> >> card to perform certain calculations, instead of the CPU?
>
> No
>
> >>
> >> - Does QGis take advantage of multiple cores and / or multithreaded
> >> rendering?
>
> Yes, and it is expected that it will make even more use of multiple
> cores in the upcoming QGIS 3.0 version.
>
> Matthias
>
> >>
> >> I am trying to understand if it would be worth my while investing in a
> >> 15" MacBookPro (with quad core CPU and discreet graphics card) over a
> >> 13" MacBook Pro (with dual core CPU and integrated graphics).
> >>
> >> Very grateful for any advice.
> >
> >
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