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Poor performance with Quadro 4000
Just installed a Quadro 4000 in my brand new Mac Pro (dual 6-core, 32GB RAM, 10.6.8, Resolve 8.1.1). Put my ATI-5770 in slot 1, Quadro 4000 in slot 2, Decklink HD Extreme in slot 3 and fibre channel in slot 4. Downloaded and installed CUDA 4.0.19 and driver 256.2.25f01. When playing prores 4444 files GPU is green and I get 25 fps, but as soon as I add some basic corrections the GPU-meter turns red and fps drops to 15-20 fps. Adding noise reduction drops the fps to about 7. If I play back the clips in QT-player or FCP all clips play back at full fps. Adding more nodes drops the performance even more. This is about the same as I get without the 4000-card (noise reduction obviously not working without nVidia)
What am I doing wrong?
Resolve can see the nVidia card since before I installed it Resolve complained that the GUI was using the same card as Resolve, and now it doesn’t complain.
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15 Replies
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If you click “About DaVinci Resolve” the application window will report the version you are running plus the number of GPUs the software is seeing. In your case, one; the saddest, slowest Quadro board you can install. But it is Apple-approved!
jPo
You mean “Old Ben”? Ben Kenobi?
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Indeed thats sad, since it’s a card recommended by Black Magic. I mean, how can they even recommend it when it doesn’t even give me real time for basic corrections in HD. Oh, it does say 1 GPU in the about box.
Well, thanks anyway, you saved me from going insane.
/Mikael
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By the way, my Quadro 4000 seems to be running at 1X pci-lane for some reason instead of 16X as it is supposed to do.
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I’m curious, where can you see that?
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About this mac/More info and click on PCI-cards and the on your graphics card
/Mikael
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I have a Cubix installed in slot 2, with 2 quadro’s 4000. When I check PCI cards in system info, it gives an error, probably because of the cubix. But in Graphics/Displays it says 8x for both of them. So that seems to be working allright.
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[Mikael Nordenstrom] ” how can they even recommend it when it doesn’t even give me real time for basic corrections in HD”
Legal reasons — remember, Apple is the new Big Brother — ssshhhhhhhh!
jPo
You mean “Old Ben”? Ben Kenobi?
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What you describe does not sound like expected performance. Your comment about 1x PCI lane width is probably why. The PCIe Lane Width should definitely show x16 for that card in slot 2. Maybe a defective card? The other thing to check is that you do not accidentally have your GUI display connected to the Q4000 card. That would seriously limit performance.
Dwaine Maggart
Blackmagic Design DaVinci Support -
No, nothing connected to the Q 4000 card.
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try to change the slot and if no changes try to change 4000 to different unit.
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Margus
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