wolverine96 writes:
> I agree. The BMW scene is not the best CUDA benchmark. ...
I've tried it numerous times with various setups, it just seems to behave a
bit weird IMO.
> My Titan Black renders the BMW in just over 24 seconds!
😀 ...
Main problem I find is I can't work out how to make it use all available GPUs.
Is that possible? One of my 580s does it in about 43s, but my system has 4 of
them, so it's a bit moot really. Mind you, I'm using an older version of
Blender (2.61), stuck with it to ensure consistent CPU-based testing.
And as you say, it also involves some CPU stuff (scene setup doesn't use the
GPU).
> Have you run a Titan Black on that AE CUDA test? If so, I am curious to see
> the results!
Alas no, atm I don't have access to anything newer than some top-end 3GB GTX
580s (MSI LX, 832MHz); my system has 4 of them. Final version of the test file
takes 14m 48s to render in AE using 16bpc and 8 samples (ie. just average
quality), so on a Titan Black I'm guessing it would take maybe 25 mins? Hard
to say. Would certainly be interesting to find out. Note the 'max' quality
setting would be 32bpc and 10 samples (likewise, for the full animation, avg
quality is 1080p @ 25Hz, max quality is 50Hz).
I'll sort out the test readme, download archive, web page, etc., next week,
but need to talk to C.A. first about some things. Anyway, here's the rendered
image in original Targa format (just one frame, the default test frame 96, the
last frame in the main animation sequence):
http://www.sgidepot.co.uk/misc/cuda.101_Frame96.tga
Here's the file converted to BMP and SGI IRIS/RGB:
http://www.sgidepot.co.uk/misc/cuda.101_Frame96.bmp
http://www.sgidepot.co.uk/misc/cuda.101_Frame96.rgb
and for those who don't mind losing a bit of quality, here's a 100% JPEG:
http://www.sgidepot.co.uk/misc/cuda.101_Frame96.jpg
The full 4 second animation takes hours to compute even at average quality and
is thus intended more as a stress test for those interested in checking that
their system can handle long renders or other GPU tasks without falling over
(I've seen many people asking for a test like this on forums). I suspect at max
quality the whole sequence would take about a week to crunch on my system.
😀
Also interesting for exploring power consumption & energy cost issues for
different GPU configs (load draw on my system during the render is around 920W).
Ian.