Mac Pro 5.1 Mojave - what GPU cards work?

[mcnichols]

Hi. I'm looking to upgrade my Mac Pro 5.1 to Mojave with PT Ultimate 2019.6 and HDX card/HD interfaces to see if performance improves over High Sierra. I note that Avid qualify just ONE graphics card - the MSI RX560 (of which there seem to be several versions available - very confusing).

Has anyone tried this yet? Is it worth doing? EXACTLY which variant of GPU card are you using? Do you still get the grey 'boot' screen at startup or nothing until the 'login' screen? Is the latest version of Mojave OK?

I'm looking at this card currently on Amazon:

https://www.amazon.co.uk/dp/B0728B1M...v_ov_lig_dp_it

My Mac Pro was a 4.1 machine with CPU upgrade (12 cores) flashed to 5.1 spec, 48Gb memory, and Samsung 850 SSD (APFS) boot drive (sorry - haven't updated system details below yet).

Thanks in advance,

Martin.