> On Oct 31, 2018, at 4:02 PM, bigfish@pacbell.net [Avid-L2] <Avid-L2@yahoogroups.com> wrote:
>
> Could you elaborate on Cuda Drivers issues.
I have not dragged this one to the ground, but here's what I found:
After upgrading Premiere and AE to CC2019 from CC2018 on a Sierra system, CC reported that the CUDA driver was not longer compatible and that a newer version was required. That CUDA driver specified is for High Sierra and above, not Sierra. Hence, CC2019 on a Sierra system does not have CUDA acceleration. It showed OpenCL and Metal, but my tests suggested that Metal was barely better than "software."
A recent Adobe blog post clearly states that Metal acceleration requires High Sierra and above, which would explain my results. Why is Metal an option in the pulldown if it doesn't work? That's how Adobe rolls..
I misread the blog and believed that I needed to update all the way to Mojave to test Metal acceleration, which I did BUT it turns out there are no nVidia drivers for Mojave, neither CUDA nor graphics, only the Apple drivers, so upgrading to Mojave also disables CUDA. There is some question as to whether there will ever be nVidia drivers for Mojave as nVidia and Apple are apparently feuding right now. They claim to be working together but outside observers suspect they are not.
Further, in order to upgrade to Mojave, your graphic card must be recognized as a "Metal" card, BUT you must first do firmware updates which requires an OEM card (I knew this from past experience). This is problematic for our old classic Mac Pros. So I swapped in an old OEM card to do the firmware update but had to swap my aftermarket card back in to install Mojave. Fortunately the GTX760 which I had swapped out to do the firmware updates was recognized by Mojave as Metal compatible when I swapped it back in. Frankly, that surprised me. I thought I was hosed because this card doe not have Apple firmware.
My Metal vs. OpenCL tests on Mojave suggested that for my configuration (12-Core 2010 with GTX760) Metal was still no better than OpenCL, a bit better than software, and CUDA was no longer an option.
So I have backed this system down to High Sierra to regain CUDA but I have not tested this configuration yet. I'm in a bit of a high wind so I'm using my other Sierra system with CC2018 right now. It's faster in any case.
I think that covers what I know from direct experience.
Oh, in all fairness, I must point out that historically, while CUDA is faster, it is also makes Premiere less stable, so I often find myself setting Premiere to OpenCL because I am crashing, and switch back to CUDA for rendering. This varies with software and driver versions. OpenCL is being deprecated, though it is still present in Mojave.
Cheers,
tod
Posted by: hoplist <hoplist@hillmanncarr.com>
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