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7.1 multi GPU support
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[Kevin Cannon] “\’m thinking two 285s in the cubix for DPX and stereo DPX, and swap one 285 for a Red Rocket when necessary…”
This is what I’m doing right now as well. I bought the cubix hoping this would sort itself out and I had to spend some money for taxes at the end of the year – needless to say I’m stoked with the multiple GPU support. The two 285’s in the Cubix are pretty crazy. I setup this config for stereo workflow but on HD programing (like I was grading today) its just un-real how quick it is. I just kept adding node after node and it playback didn’t move a bit.
Now that I’ve tasted the secret sauce I wonder about the larger cubix expansion boxes. LIke the 16 slot rackmount. Sure I could buy the linux version but would also have to buy all the hardware. So assuming I could buy 8 285s I could have a 8 GPU system on the mac!
Robbie Carman
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Colorist and Author
Check out my new Books:
Video Made on a Mac
Apple Pro Training Series DVDSP
From Still To Motion -
You can actually put 2 GTX285 and 1 Red Rocket in the Cubix Desktop 2 (with the 4-slot option).
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hmmm I couldn’t seem to get that to fit. Will open it back in the morning. I have a Rocket but pulled it per the config guide. Also per the config guide it says “blocked” for two GTX285s in the box. Did you mean the Desktop 4?
Robbie Carman
—————-
Colorist and Author
Check out my new Books:
Video Made on a Mac
Apple Pro Training Series DVDSP
From Still To Motion -
The Desktop 2 has an option for a 4-slot configuration. I’m not sure if you have the 2-slot or the 4-slot configuration. Also it’s important to have the x16 cable and Cubix host-side card for optimum performance. (This is documented in our config guide)
If you put the GTX285 in Slot1, you still have the Slot2 available. It sort of extends out a little bit from the motherboard, but once you put the screws on, it is quite stable. The other GTX goes in Slot 4, and will block Slot 3. So you have the Slot 2 free for the Red Rocket.
If you have the x8 cable and the 2 slot model, it should still work, but we haven’t tested it. In this case, it might be better to swap the 2nd GTX285 with the Red Rocket.
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I find with last years 8 core, ProRes 444 bogs a little bit.
I understand that codec decoding is done on he CPU, but hoping maybe somehow getting another GPU will take some other tasks off the CPU and maybe make things like PR444 quicker?
Or am I full of it?
Clearly these GPU can do a lot of work. I just wish some of these things that are killing us like Red debayering, codec decoding, etc could be done on GPUs instead of the CPU.
Nate Weaver
Director/D.P., Los Angeles
https://www.nateweaver.net
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