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chfilm

macrumors 68040
Original poster
Nov 15, 2012
3,427
2,110
Berlin
Hey guys,

I have a 16core without afterburner and a single Vega II, and use mainly Premiere and sometimes Resolve for editing and some color correction.

I'm fairly happy, but wondering as I sometimes see during h264 export that my Vega II maxes out at 99% of GPU processor and memory - what some of you with dual Vega IIs are observing during their day to day work. I know how crazy expensive the standalone Vega MPX module is and dont know if it would offer any significant benefits for me.. does Premiere use the link between the two cards at all? Is it able to utilize a second GPU? What are your observations? :)
 

rawweb

macrumors 65816
Aug 7, 2015
1,126
943
Hey guys,

I have a 16core without afterburner and a single Vega II, and use mainly Premiere and sometimes Resolve for editing and some color correction.

I'm fairly happy, but wondering as I sometimes see during h264 export that my Vega II maxes out at 99% of GPU processor and memory - what some of you with dual Vega IIs are observing during their day to day work. I know how crazy expensive the standalone Vega MPX module is and dont know if it would offer any significant benefits for me.. does Premiere use the link between the two cards at all? Is it able to utilize a second GPU? What are your observations? :)

I work on a variety of systems, from iMac, iMac Pro, MacBook Pros, and all generations of Mac Pros and have encountered the same thing with Premiere Pro that I don't get with Resolve. I think it's yet another example of Adobe's greatness. I've seen the same result with our 2019 Mac Pro. At home, my 2013 Mac Pro with D700 and eGPU Vega 56 Pro suffers the same fate.

Right now on a 2017 iMac, I have a Pr project open (nothing else, and sitting idle as I type this I see max'd GPU memory).

Screen Shot 2020-09-18 at 1.36.18 PM.png
 

chfilm

macrumors 68040
Original poster
Nov 15, 2012
3,427
2,110
Berlin
I work on a variety of systems, from iMac, iMac Pro, MacBook Pros, and all generations of Mac Pros and have encountered the same thing with Premiere Pro that I don't get with Resolve. I think it's yet another example of Adobe's greatness. I've seen the same result with our 2019 Mac Pro. At home, my 2013 Mac Pro with D700 and eGPU Vega 56 Pro suffers the same fate.

Right now on a 2017 iMac, I have a Pr project open (nothing else, and sitting idle as I type this I see max'd GPU memory).

View attachment 955237
So you're saying, it's a waste because the second GPU just sits idle like it used to on the trashcan and one has a maxed out memory but processor mostly also sits idle...? :)
 

rawweb

macrumors 65816
Aug 7, 2015
1,126
943
So you're saying, it's a waste because the second GPU just sits idle like it used to on the trashcan and one has a maxed out memory but processor mostly also sits idle...? :)

I think so, Premiere and After Effects don't seem the best at utilizing multiple GPUs like Resolve or FCPX does. I watch like a hawk, and my 6,1 with three GPU's I don't think I've ever seen Pr tap much of the two D700s and seems to prioritize whichever GPU is being used for the monitor, in my case the Vega 56. Same thing seems to go for laptops with eGPUs. I don't believe a discreet card would behave differently, but maybe someone else can chime in with their experience.
 

profdraper

macrumors 6502
Jan 14, 2017
391
290
Brisbane, Australia
I put in a second Vega II after experiencing the same maxed-out render performance, though I do not use any Adobe software, rather Davinci Resolve Studio & sometimes FCPX. Resolve can be snappier depending on the task: Noise reduction /Neat Video, timeline caching, export rendering (incl.H264) etc.

In any case, the performance difference between one and two Vega IIs appears pretty much consistent throughout (according to various bench-testing tools including iStats and Sensie): max. 50% more grunt with a second card, but nothing more than that. Can't say this is especially impressive given the vast overpricing by Apple, but on balance, I decided to keep the second card because it does help. In practice (and without watching the clock), my usual workflows are snappier & smoother overall.

My only other observation here is that I wish I'd bought the MPX DUO module to start with (but was SO rudely overpriced) - primarily because that would still leave some PCIe slots free for future possibilities. As is now stands, all PCIe slots are filled - Blackmagic MiniMon 4x, UAD-2 quad, Sonnett 4x4 & then the two Vegas. Still, it continues to run quite and cool. [Oh, the Vegas are very underwhelming in BootCamp].
 
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