Pls Help - Buy New GPU

[guimarconi]

I'm buying a new GPU, I wonder if the Octane supports VGA Zotac GeForce GTX 690 4096MB?
More memory is better? Or more cuda core?
It's a good choice? Any tips purchase card?
Thank you.

[kavorka]

That card is supported.
anything from 5.xx and up should give you very good performance.

cuda cores between cards is hard to judge because there is more to it than the number. the clock speed ect will play a big role in the speed..

The 690 is one of the fastest single cards you can get (590 may give better speed).
The VRAM has no effect on speed, but everything needs to be loaded into it, your mesh, textures and also your render (so rendering at higher resolutions required more VRAM)

The 590 and 690 and both double cards glued together. the 690 is two 680s and will give you speeds a little slower then 2 680s (i think the clock speeds are slower).
Since it is 2 cards glued together, that 4 gigs of VRAM is actually only 2 as far as Octane is concerned because it needs to load everything into both cards separately.

The new Titan seems to be getting speeds around the 690, but has more VRAM. I think there is a 6 gig model, and that is actually 6 gigs.

What type of renderings are you doing, that will help you choose the best card.

[guimarconi]

Hi Kavorka,
Thanks for your answer.
I'm just an enthusiast
I work as an illustrator and im trying something in 3D. My 2D works is available at: http://brain.marconi.nu/index2.html
As I am having problems with my PC, I'll change some stuffs and thought about getting a good GPU to render future images.
My last render was this: http://guilhermemarconi.com/prototype/prototype.jpg
See you.

[acc24ex]

- the above mentioned stands
- I think the 590gtx stil outperforms 690gtx - check for latest benchmarks on the forum before you buy - I have 590gtx / so I'm interested as well since there's a load of unclear benchmarks all over the forum, the 690 has more memory - and yes remeber that the total memory is not shared between the GPUs you use half of total memory for each, so my 3gb 590 has 1,5 memory allocated per gpu - if you don't create large scenes - it is enough
- seems to be a cheaper option to buy 590 - and wait for the 7xx series or 8xx ?

http://render.otoy.com/forum/viewtopic. ... =gtx+titan
http://render.otoy.com/forum/viewtopic. ... &start=170

BTW nice illustrations:) - although that flash site takes ages to load a single pic
- what software are you using for those?

[kavorka]

does the 590 still outperform the 690?
The 6.xx series got a bigger speed increase than the 5.xx in the last release.
I have a 580 and a 690 in my computer. By disabling the 690, my 580 shows a 3.32 on my current scene. disabling the 580 shows my 690 at 6.9.
that's over 2x vs the 580. And the 590 should be slightly slower than 2 580s.

This isnt with a demo scene but for a scene I am rendering for a client, in PMC with fake shadows on for glass.

This is similar to other tests I have done, all show the 690 to be more than 2x faster than a 580.

Maybe ill load the actual demo scene soon and post my results.

[acc24ex]

I can test it on the 590. where is that demo scene

[jagger]

so the final thing is that currently titan is the best option in performance terms for octane, isn it?

[acc24ex]

OK - here's the performance from my 590gtx - using octane 1.11 standalone > benchmark file http://render.otoy.com/forum/viewtopic. ... =benchmark
- octane_benchmark.obj loaded without texture - straight up defaults

590 GTX
- Directlighting - 51.77
- PT - 8.81
- PMC - 6.95

with texture concrete.jpg
- DL - 41.33
- PT - 7.06
- PMC - 6.45

there - we probably need a different approach to benchmarking - since the latest version should always be used to test out performance in coding
- now show us the 690gtx numbers - and the Titans

[kavorka]

I just ran the benchmark with 1.1 for my 580 and 690
both with pathtracing.

580 - 3.55
690 - 6.4

[acc24ex]

So I believe the numbers are obvious - if 690 was any faster it would have at least twice the results of the 580..and 690 runs 10% slower than 590 - not really an "upgrade" cheap 590s are the way to go