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Multiple GPU’s work fine with Color…on my system at least…
I installed a GT 120 on my 2008 MacPro (has to be 800 MHz). The original card is a GeForce 8800 GT. Ran Color and FCP then sent graded RED sequences back and forth multiple times. Absolutely no hang ups whatsoever.
I first tried it on the 8800 GT(which still rocks by the way) on dual monitors then rebooted with my ACD hooked up to the GT 120. I don’t have any monitors with a mini display port so I only worked off of 1 screen.
I think the main problem would be using both GPU’s to run displays simultaneously, but how many people do that? I ran into this problem months ago when I tried using a 7″ Mimo touchscreen with Color and a message popped up saying it doesn’t support 3 screens or something.
Hopefully this works out when Resolve comes around.
Reposted on the Apple Forum.
Motion Design, Color, Editing
SWGC Incorporated -
35 Replies
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Nice find. Thanks for the heads up!
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Just get me one and I’ll be happy to try it out. Haha.
twitter.com/illyalaney
Motion Design, Color, Editing
SWGC Incorporated -
It’s not the 4800 but….
I recently got my GT120 and GTX285 and popped both in my 2008 Mac Pro. Leopard kernel panicked on me (no idea why), but Snow Leopard booted like a champ.
I had a monitor plugged into the 285, ran Color, no problems. Rendering and exporting seemed to go fine. (of course, only 8bit and floating point on NVidia cards in Color).
So, that at least confirms that if you have a 120/285 DaVinci setup you can still go back and use Color.
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[Vladimir Kucherov] “at least confirms that if you have a 120/285 DaVinci setup you can still go back and use Color.”
By unplugging one of the GPU’s, correct? Because there are other forums full of woe and lamentation regarding this very subject.
jPo
You mean “Old Ben”? Ben Kenobi?
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Do you mean unplug from the motherboard, or unplug all monitors connected to it?
Both cards were plugged in, but only the GTX285 had any monitors attached to it. I’m guessing running monitors on both cards would cause problems.
I’m also guessing that to go between a DaVinci and Color on that setup would require swapping monitors, because I have a feeling the GT120 would be underpowered to run Color. I have not tested this though.
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Problem comes when monitors are plugged into both cards I think. Why anyone would do that, I don’t know.
When I used the GT120 it was about a 10 to 1 render time for 4KHD R3D to ProRes 422. Basic grade with 2 secondaries including a cheesy vignette and an HSL key on the talent’s skin. Managed to get 12 fps using half resolution proxy with secondary display UI turned off for playback. It dropped to 7-8 fps as soon as I turned the Color scopes back on.
twitter.com/illyalaney
Motion Design, Color, Editing
SWGC Incorporated -
[Vladimir Kucherov] “Do you mean unplug from the motherboard, or unplug all monitors connected to it?”
The latter — unplug the monitor(s) from the supernumary GPU. Then the OS ignores it, and its how you sidestep the multiple GPU issue as has been explored in the past couple of years. Yes, it “works”, but only in the sense that only one GPU is officially recognized at a time within the Apple COLOR implementation, and its when you “remove” it from activity, the conflicts resolve.
This single pipeline is one of the reasons why the “real-time preview playback” has eluded users, and even a somewhat higher performance card would hardly make any difference at all. Reality is that it would have to be orders of magnitude faster, not just a percentage comparable to a restaurant tip. That might be important for a gamer, but the gap is so large in COLOR that debating the difference between a couple of cards in the same family is fatuous.
jPo
You mean “Old Ben”? Ben Kenobi?
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Are you also saying that the reason DaVinci can do realtime is in large reason due to using 2 GPUs? Surely the GT120 doesn’t add that much to a 285 or a 4800.
Or does DaVinci simply run on dark matter and rainbows?
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Is there any sort of benchmark test comparing GPU’s and render times for Color? I’m curious to see how much of a difference it makes.
twitter.com/illyalaney
Motion Design, Color, Editing
SWGC Incorporated
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