NV3.2 and multiple CUDA cards, results!

general questions about Neat Video
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gyromedia
Posts: 2
Joined: Fri Jun 15, 2012 2:13 pm

NV3.2 and multiple CUDA cards, results!

Post by gyromedia » Fri Jun 15, 2012 7:56 pm

Hi, just got my setup ready. 1 Cubix box, with 1 redRocket and 3 GTX570 2.5GB cards.
On a MacPro 24Cores(HT). OS X.7.4, FCPX10.0.5

Running the optimize performance I get:

Radius = 0 => 21.7 fps (04 CPU cores, and 2 x GTX 570)
Radius = 1 => 11.6 fps (10 CPU cores, and 1 x GTX 570)
Radius = 2 => 09.9 fps (10 CPU cores, and 1 x GTX 570)
Radius = 3 => 08.4 fps (07 CPU cores, and 3 x GTX 570)
Radius = 4 => 07.5 fps (12 CPU cores, and 3 x GTX 570)
Radius = 5 => 06.5 fps (15 CPU cores, and 3 x GTX 570)

So does the CUDA acceleration scale well? I don't know, what should we expect...

Looking at the graph of it, shows a big dump from 0 to 1 radius, and therefrom, only a low decrease...

So how important is the radius parameter, is it different on very different shots?

Codecnoise VS. old, scruffy VHS noise i.e. ???

cheers Helge

NVTeam
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Post by NVTeam » Fri Jun 15, 2012 9:20 pm

Please kindly post the complete log from Optimize for some typical parameters like: 1920x1080p, rad=1, 32-bit.

If I understand correctly, when running in an expander box, all the cards are still connected through a single PCIe slot of the Mac, and that may be the bottleneck in this case. If they were individually connected to separate PCIe slots of the Mac, without the expander, perhaps that would allow to achieve better speed with 2 and 3 GPUs. You may want to try that for a test.

Thank you,
Vlad
Image Image Neat Video team
noise reduction for video and photos

gyromedia
Posts: 2
Joined: Fri Jun 15, 2012 2:13 pm

Post by gyromedia » Sat Jun 16, 2012 6:58 am

Hi Vlad, it's not possible to do it without an expander, due to limitations of power, each card comsume 550W max and uses two pwerconnections... so in my mac I can only have one GPU card at the time...

I'll run the tests again and post the full results... next week.

/Helge

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