[Bf-cycles] Re : Cycles on Nvidia Kepler

[Matej Mo]

Hi Myke & thanks for your fast reply!

So, am I to understand that Cycles depends more on double precision than
single? I'm using Octane a lot too and they have a Kepler build that is
something like 15% slower than a Fermi specific build, which is not
*that*much (if you consider that Kepler also eats less electricity).
But as I
understand Octane mainly works with single precision.

The 5xx family has the best price / speed, that's for sure. The problem is
that is now hard to find cards with a decent amount of RAM (2GB or more)

The new GK110 seems promising but its still unclear when (if?) Geforce
cards with this chip will come out (teslas are way out of my league :)


On Tue, Sep 25, 2012 at 10:26 AM, myke at octopod-studio.com <
myke at octopod-studio.com> wrote:

>
> Hi, i ve made a lots of testing about this, and actually the gk104 gpu
> familly is really weak on double precision opérations...
> So, every 6xx gpu are slower than 5xx ... 5 cores of 6xx = 1 core of 5xx
> in double...
> Only one version of blender on graphicall have succeded to run cycles on
> an Asus 680 dcuii , but i ve also made some tests with iray and other gpu
> renderer... It s the same...
> Nvidia have said that the first kepler 2 will come with the tesla k20, and
> new quadro and gtx after... 6 month to wait minimum...
> So i ve built for a little studio a rendering machine with 4 580 gainward
> phantom 3 go, and i think it s the better price/speed actual solution...
> But i think that Brecht will say more about this. ( don't think that s
> possible to convert everything in single précision )
> Regards...
> Myke
>
>
> ----- Reply message -----
> De : "Matej Mo" <mo.cgraphics at gmail.com>
> Pour : <bf-cycles at blender.org>
> Objet : [Bf-cycles] Cycles on Nvidia Kepler
> Date : mar., sept. 25, 2012 09:29
>
>
> Hi!
>
> I'm interested to know if Cycles works on Kepler arhitecture (6xx series)
> and if there are any benchmarks that would show a comparison in speed with
> Fermi (say a 680 vs a 580).
>
> If Cycles doesn't work on Kepler cards, could you estimate when such
> support will be added?
>
> I need to buy a new render card, since my last one died and the decision
> which one is a lot dependent on how (if) it works with Cycles.
>
> Regards!
>
> --
> Matej Mo, freelance CG artist
> http://matejmo.deviantart.com/gallery/
>
>
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>


-- 
Matej Mo, freelance CG artist
http://matejmo.deviantart.com/gallery/
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