Yet another report, if anyone else is battling with this card... Almost immediately after writing my last post about having a stable build for two days since updating OC to 0.7.0 it crashed. And kept crashing, always with the same symptoms: a varying number of flickers of the menu bar and crash to black screen. Sometimes music would still play for long periods, sometimes it would start skipping too. This is not browser specific as some have suggested (on the Windows side, the infamous 5700XT "Chrome acceleration bug") as I've had it happen with Safari as well and even while using Affinity Designer. Curiously enough, many times I've had Apple Music open but not always (maybe it's just because I play it almost all the time).
So I went through the process of changing SMBIOS to iMacPro1,1. The same story, it behaved like an angel for two days and suddenly the trouble began again.
I'm beginning to lose all hope with this card. And I'm also getting convinced this might be a hardware problem, a faulty card, because many have their respective cards working. In that case I'd be totally screwed since it would take many weeks to send the card back in and wait for the inspection and decision. Even if got a new card to replace I'd have no guaratees it would work. I've been reading so much bad about these specific Sapphire cards. I need my Hack for work every single day, it's not an option. And the 6000 family is just too expencive right now and probably even hard to acquire in this sales situation...
There's only this one remaining option to try iMac20,2 SMBIOS as
@canyondust recommended. I'm a little wary to do so since we have different CPUs but I guess I'll have to, nothing to lose there...
Is there anyone else still in trouble with this Sapphire Nitro+ version? Has anyone permanently solved it???