[Ian Mapleson]

No, but I’m trying to sell two 580 3GB cards atm; if I can then I’ll replace
them with a 980 and test it.

Ian.

SGI Guru

[Ian Mapleson]

Sorry for the long delay Tenchi, did you manage to get your card working eventually?
I was reading your post again just now, wondering if maybe the card was simpy faulty
in some way, whether you’d been able to replace it via RMA.

Ian.

SGI Guru

[Ian Mapleson]

Have you added the 750 Ti name to the raytracer_supported_cards.txt file? It won’t
be able to use the card until you do.

Use GPU-Z to identify the proper name of the card (it might be different to the
marketing name – the string has to be an exact match, so character spacing is
important).

And make sure the NCP recognises the card as supporting CUDA, etc.

Ian.

SGI Guru

[Ian Mapleson]

This is why I’ve been hoping that the X99 chipset will up the max RAM to
128GB or more, but I fear it won’t.

Ian.

SGI Guru

[Ian Mapleson]

Teddy writes:
> Yep, already have one titan, so the performance bump is worth it for a reasonable price,
> it could actually double my workflow speed.

Ah I see! Yes indeed, though I doubt there would be any problem with using a non-reference
Titan, or a Titan Black.

> I was actually talking more about C4D viewport performance, not octane rendering,
> although it would be a good setup for that too.

Ah, now that I don’t know. Sorry!

Ian.

SGI Guru

[Ian Mapleson]

Teddy writes:
> I would like the 6GB RAM, it does get eaten up by AE in big scenes, especially in 2k and up. …

I guess that figures.

> … There can be stability issues without having matching cards, I have found in the past. …

Ah, so you already have one Titan?

> … Additionally, I do want the option of SLI for gaming.

Another Elite Dangerous addict in the making. 😉

> However does anyone know how C4D R15 handles dual GPU setups? …

I assume by that you mean with the octane plugin, yes? Octane Render
can exploit multiple GPUs ok, and they don’t have to be of the same
type at all.

> Does SLI make a difference? …

Very unlikely. It shouldn’t do for any kind of rendering task.

> … Can it utilize two different GPUS like AE?

Yes. See:

https://render.otoy.com/manuals/Standalone_2_0/?page_id=20
https://render.otoy.com/manuals/Standalone_2_0/?page_id=52

Ian.

SGI Guru

[Ian Mapleson]

Thanks Eric for the Octane link!! Duh me, someone told me about Octane a couple of
weeks ago, but I’d forgotten it was a plugin for C4D, though now I remember why: the
benchmark scene res (HD) is larger than the max pixel size of the plugin demo (1000×600)
so I can’t use the demo to test how C4D/CUDA would compare.

Michael Szalapski writes:
> Wow, that’s a lot of reflection-y surfaces!

It was designed to be a CUDA killer. 😀 One frame to use as a performance benchmark,
the whole animation as a stability test (kept seeing comments from people asking for
something that can really hammer a system to check that long duration renders won’t
knock their system over).

With two Titans at max detail, the full 4 second animation would take maybe 2 days
to compute. I’ll be writing a page for it soon for my site.

> If I had time, I could try to build something like this in C4D to test it, but it’s
> a bit hard to see what’s going on. I can’t even make out the shape of some of the
> geometry. Is there a download of that somewhere I could use as a reference?

Here’s the aep:

https://www.sgidepot.co.uk/misc/cuda.101.zip

If you go through the usual RenderQueue setup, it’s preset to process just frame 96
at medium res/detail (or should be), ie. 16bpc, 8 levels (RayTrace3D options), HD 25fps.
Max detail is 32bpc, 10 levels, 50fps.

Ian.

PS. I didn’t create the aep. Friend of mine did all the hard graft.

SGI Guru

[Ian Mapleson]

Michael Szalapski writes:
> … (However, the ray-traced 3d rendering feature is considered obsolete now that
> we have C4D included with AE.)

I must confess my knowledge of C4D is minimal. Can it be GPU accelerated? I was wondering
how it would compare for rendering something like this (reflections gone whacko):

https://www.sgidepot.co.uk/misc/cuda.101_Frame96.jpg

That takes about 15 mins to render on four GTX 580s (Titan Black = approx. 25 mins)

Ian.

SGI Guru

[Ian Mapleson]

Larry Wheeler writes:
> … I somehow never knew the GPU wasn’t part of the equation with AE. My apologies.

Actually it very much does matter if you’re using the RayTrace3D function, which
employs CUDA acceleration. Massively faster than the main CPU(s). My system has
four GTX 580 3GB cards for this (faster than two Titan Blacks, but much cheaper).
Other parts of AE can exploit OpenGL or CUDA to run faster aswell; details on the
Adobe site here:

https://blogs.adobe.com/aftereffects/2012/05/gpu-cuda-opengl-features-in-after-effects-cs6.html
https://helpx.adobe.com/after-effects/using/rendering-opengl.html

And indeed on this site, see:

https://forums.creativecow.net/thread/2/1019120

I’ve tested a K5000 with Viewperf, it’s quite a lot faster than a 4000, at least
where the GPU is indeed the bottleneck. See:

https://www.sgidepot.co.uk/misc/viewperf.txt

Ian.

SGI Guru

[Ian Mapleson]

Teddy writes:
> Quick question: i am actually hunting for a gtx titan NON black edition ( ie original)
> to speed up a project im working on. I already have one titan and want the other for SLI.

Just wondering, do you really need the 6GB RAM? If not, you’re much better off with a GTX 780 Ti,
which will be faster than a standard Titan and cost less than a used Titan. Also, there’s no need
to link them SLI for AE, it has no effect, unless you’re using the same system for games aswell. 😉

> … Or in the nyc area through a craigslist type sale…

NY? Cool!! Best city I’ve been to so far IMO. T’was 14 years ago, but I’d like to go again someday.

Ian.

SGI Guru