Has anyone tried using two Metal cards in 5,1 slot 1 sapphire card slot 3 or 4 flashed Nvidia GT 630 2 GB Dual DP/DVI
thanks mike
thanks mike
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MP 1,1-5,1 5,1 using 2 metal Graphic cards
- Thread starter Michael Vogt
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h9826790
macrumors P6
AlexMaximus
macrumors 65816
in the blog below, there are dozens of examples with two Metal cards in use. But its either two AMD or two Nvidia. The mix up between both brands usually does not work or is at the minimum a huge PITA. Avoid it at all costs.
pixlas-4-1-mac-pro-mod.1859652
when i got my rx580 i tried running it along side the GTX 650 EFI flashed card ... one card worked, the other did not.
iluvmacs99
macrumors 6502a
In High Sierra, it works but with some major issues. Sometimes it will crash the computer and sometimes it will default to the Nvidia card for no reasons whatsoever for computing tasks and will cause display anomalies. Mojave does not like mixed GPUs. The only time that is advantageous is when you are rendering video in Davinci Resolve Studio where it does support more than one GPU for rendering. Otherwise, it is more trouble than usual, unless you get matched AMD cards or matched Nvidia cards using High Sierra. And no, hardware acceleration is not supported on the Nvidia GT 630 series by VideoProc despite their ad claims and their repeated claims by their tech support that it does on a Mac if this is what you are planning to do. And neither does the GTX 750 Ti and 1080Ti. Handbrake does not support HW acceleration either with Nvidia GT/GTX card. I tried most of them as I had access to a few. If all you want is a boot screen, there are several approaches using AMD GPU.
h9826790
macrumors P6
Not VideoProc / Handbrake's fault, NVENC doesn't work at OS level. Nvidia never activate the video engine in macOS / OSX.
If the function doesn't exist in the OS, there is nothing the software developer can do.
iluvmacs99
macrumors 6502a
Indeed, but Digiarty still maintained that VideoProc supports HW accel on Macs with Nvidia GPU. They still hadn't corrected their claims despite proof provided.
h9826790
macrumors P6
Yeah, I know what you mean, I read that spec page quite a few times. Obviously in very bad and confusing format.
They separated the supported GPU from the supported OS. If people assume all supported GPU can work on all supported OS, that means an 5700XT can be used in Snow Leopard. Which obviously is wrong.
Therefore, my understanding, there is no relationship between supported GPU and supported OS. Only the correct combination can work, but Digiarty fail to provide such table.
That supported OS only means the software can work, but not necessary means HWAccel can work.
That supported GPU only means HWAccel can work, but no necessary on all supported OS.