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GPU Ram for 4K projects, how much is enough?
I have tried to answer this question many times in the past and been unable to.
I am an Art Director with MANY years in film biz. I am NOT however a colorist.
And I don’t know the software well enough to test beyond “It works”
So I discussed this with someone who knows the software better than just about anybody.
He tried a GTX285 1GB vs a GTX285 2GB.
I will let the expert’s words speak :
“With the stock 1G GTX285, using a 5120×2700 Red Epic file and timeline resolution, 2 parallel blur nodes runs out of GPU RAM. With the 2G GTX285, I get up to 14 parallel blurs nodes. Adding the 15th parallel blur node runs out of GPU RAM.
A 5120×2700 resolution timeline would be near a worse case scenario I think, at least on a Mac. Of course you would not usually grade a project at this timeline resolution, but you may well want to render it out at the native file resolution. I think 14 parallel blur nodes is plenty of headroom for most normal grading. I doubt anyone would have an issue with that. So for high resolution timelines, the 2G card would definitely be desirable over the 1G card.”
So somewhere between 1 GB and 2 GB seems to be the current “Magic Number”.
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30 Replies
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As stated many times by BMD ,
2 x GTX580 3GB Ram are the minimum requirement to work on a 4K timelineYou probably tried only 1 shot to get those performance (and honestly those performance seem a bit to optimistic for a GTX 285)
g
Davinci Resolve Control Surface
MacPro
Cubix desktop 4
2 Red Rockets
GTX470+GTX470+GTX470
24GB RAM
HP Dreamcolor
Panasonic 58PF Plasma
Ultrascope -
Was a BMD employee who wrote that.
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Rohit and Peter both said that 3GB is minimum to Have a smooth session on 4K timeline (and 2 or more
Card are suggested )I had problems with 3x GTX470 when I tried to render out a movie at 4K
Resolution …g
Davinci Resolve Control Surface
MacPro
Cubix desktop 4
2 Red Rockets
GTX470+GTX470+GTX470
24GB RAM
HP Dreamcolor
Panasonic 58PF Plasma
Ultrascope -
Here is repost of when I asked this…
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Re: GPU RAM question
by Peter Chamberlain on Mar 5, 2012 at 5:53:28 pmWe recommend 3GB GPU ram if you plan on doing 4K work.
1.5MB will get you by sometimes but its not advised.
Peter
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____It took me a few tries to, but eventually it was answered by the BMD folks. I’ll be testing out one of your GTX 570’s w/2.5GB… so we shall see how that does.
– JL
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It seems that 1,5 gig tends to run out of memory in some cases and 3 gigs are recommended therefore to
have some memory overhead?—
Margus
DaVinci 8.2.1 OSX 10.7.3
MacPro 5.1 2×2,93 24GB
GTX 470 / Quadro 4000
Multibridge 2 Pro -
“So somewhere between 1 GB and 2 GB seems to be the current “Magic Number”.
Looks like my guess & source at BMD were right.
Good to know what the “Minimum” is.
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so we could presume 1,87 ? 🙂
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Margus
DaVinci 8.2.1 OSX 10.7.3
MacPro 5.1 2×2,93 24GB
GTX 470 / Quadro 4000
Multibridge 2 Pro -
We found the issue with 4K plus rendering may not just be about the cards but the OS you are on.
Using 3xGTX470 on Mac OSX Resolve we could grade OK but it would not render a single frame at 4K: it would stall with no error reported and hang.
Switching the project to a Windows 7 based Resolve with the same GFX cards rendered fine.
James Milner-Smyth
CTO The Post Factory Group, London
Post Factory, Gear Factory, Look Factory
https://www.postfactory.co.uk
https://www.gearfactory.co.uk
https://www.lookfactory.co.uk -
I upgraded to Lion in order to put in a 580 standard Newegg card along with my 120 things work well now for rendering beyond 2K.
DaVinci 8.2 OSX 10.7.3
MacPro 12-core 5,1 2.66 Ghz
32GB RAM x4 8GB
Software RAID 0 (8TB Internal)
Nvidia GT120/GTX580
BMD Extreme3D
HDlink3D DisplayPort
Dreamcolor/Panny VT25
Tangent Wave / Wacom -
the full res rendering thing is still a mystery to me …
at my office i have Lion 10.3 and i have hard time to render even in HD but having R3D set at full rez (even resetting PRAM)
at home i have Lion 10.3 and it render like charm , there must be something else involved in that issue ..
g
Davinci Resolve Control Surface
MacPro
Cubix desktop 4
2 Red Rockets
GTX470+GTX470+GTX470
24GB RAM
HP Dreamcolor
Panasonic 58PF Plasma
Ultrascope
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