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ali_sraj

macrumors newbie
Original poster
Jan 26, 2022
8
0
Hello everyone,,
i have a mac pro (Early 2009) Upgraded from 4.1 to 5.1 with Nvidia Quadro 4000 (for mac) on high sierra, the problem is , i can't use CUDA no matter what i do, i installed the latest web drivers and updated the CUDA drivers, but Nothing seems to work , when i open Premiere Pro or DaVinci Resolve i get OpenCL only.

Sorry if this topic is already discussed, i searched everywhere and i didn't find any solution to this problem.

my mac specs is in the picture below.

Please Help , and thanks in advance.

About.png
 

OS6-OSX

macrumors 6502a
Jun 13, 2004
949
759
California
It's been awhile but if i remember correctly, the Nvidia card that uses CUDA must not be the one attached to the monitor.
The example below (DaVinci) the GTX 980ti and GTX 960 CUDA cores are being used
The Quadro 4000 is not on the list (like yours it's connected to the monitor(s)
Also, the Quadro 4000 has only 256 CUDA cores. With 32GB of RAM you are better off using the memory.
To test this theory, connect your monitor to another GPU (if you have one) and switch back and forth exporting files. They say CUDA is 30% faster than OpenCL. But 256 CUDA vs 32GB I see CUDA losing.
The down side is how and how much $ would it take to compare "real" CUDA numbers vs your 32GB of RAM?
The two cards shown in DaVinci have a combined total of 3840 CUDA cores. In today's CUDA world that is nothing! The RTX 4090 has 16384 CUDA cores!


1.png
 
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h9826790

macrumors P6
Apr 3, 2014
16,656
8,587
Hong Kong
Hello everyone,,
i have a mac pro (Early 2009) Upgraded from 4.1 to 5.1 with Nvidia Quadro 4000 (for mac) on high sierra, the problem is , i can't use CUDA no matter what i do, i installed the latest web drivers and updated the CUDA drivers, but Nothing seems to work , when i open Premiere Pro or DaVinci Resolve i get OpenCL only.

Sorry if this topic is already discussed, i searched everywhere and i didn't find any solution to this problem.

my mac specs is in the picture below.

Please Help , and thanks in advance.

View attachment 2134815
Which version's PP and DV?
 
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Reactions: ali_sraj

ali_sraj

macrumors newbie
Original poster
Jan 26, 2022
8
0
It's been awhile but if i remember correctly, the Nvidia card that uses CUDA must not be the one attached to the monitor.
The example below (DaVinci) the GTX 980ti and GTX 960 CUDA cores are being used
The Quadro 4000 is not on the list (like yours it's connected to the monitor(s)
Also, the Quadro 4000 has only 256 CUDA cores. With 32GB of RAM you are better off using the memory.
To test this theory, connect your monitor to another GPU (if you have one) and switch back and forth exporting files. They say CUDA is 30% faster than OpenCL. But 256 CUDA vs 32GB I see CUDA losing.
The down side is how and how much $ would it take to compare "real" CUDA numbers vs your 32GB of RAM?
The two cards shown in DaVinci have a combined total of 3840 CUDA cores. In today's CUDA world that is nothing! The RTX 4090 has 16384 CUDA cores!


View attachment 2134966

Thanks For your Reply

i have another NVIDIA GeForce GT 120 Mac Edition, i'll try it right now.

By the way
what do you mean when you said ( you are better off using the memory ) ?
 

OS6-OSX

macrumors 6502a
Jun 13, 2004
949
759
California
When you finally compare "your" CUDA speed vs RAM you will find out 256 CUDA cores will not out perform 32GB's of RAM.
(In Davinci)
1. Under preferences>Memory and GPU>GPU Configuration set GPU Processing mode to OpenCL (save)
2. Import some footage (R3D, Alexa, or .h264 ect)
3. Under the Deliver tab select desired Codec-Format-Type in export settings
4. Add to Render Queue
5. Start Render
6. Take note of time to complete
7. Under preferences>Memory and GPU>GPU Configuration set GPU Processing mode to CUDA (save) (You have to restart DaVinci)
8. When you render this time and take note of time to complete, just compare the two times.
 

ali_sraj

macrumors newbie
Original poster
Jan 26, 2022
8
0
When you finally compare "your" CUDA speed vs RAM you will find out 256 CUDA cores will not out perform 32GB's of RAM.
(In Davinci)
1. Under preferences>Memory and GPU>GPU Configuration set GPU Processing mode to OpenCL (save)
2. Import some footage (R3D, Alexa, or .h264 ect)
3. Under the Deliver tab select desired Codec-Format-Type in export settings
4. Add to Render Queue
5. Start Render
6. Take note of time to complete
7. Under preferences>Memory and GPU>GPU Configuration set GPU Processing mode to CUDA (save) (You have to restart DaVinci)
8. When you render this time and take note of time to complete, just compare the two times.

Thanks, i understand now :)

but sometimes i need to use CUDA for some effects while i'm editing
 
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