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Old 10-17-2020, 01:41 AM
roderickelms roderickelms is offline
Join Date: Nov 1998
Location: London
Posts: 85
Default Use dual GPUs cards for Snow Leopard and Mojave?

I have Pro Tools 8 HD system which I cannot afford to update for now. It runs on a Mac Pro 5,1 under Snow Leopard with a Radeon 5770 HD card. I can also boot into Sierra from another drive to use recent music notation software – all working very well.

I'm getting to the point where I will need to update the latter option to at least Mojave for forthcoming notation upgrades and I believe the Radeon 5770 does not support beyond High Sierra. A second computer is also not an option.

Does anyone know whether I could add a second GPU card to the MacPro enabling it to boot into Mojave and use an HDMI switch for the monitors? I believe that the Mac would boot into Mojave providing there is a compatible card inside?

If anyone has any knowledge or experience it would be greatly appreciated. Thank you.
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