Mac Pro 7.1, Adobe Premiere 15.2, BMD DeckLink Minimonitor 4k Erratic video output

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Jun 16, 2021 Jun 16, 2021

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Hi All,
Having a very strange problem which I hope someone can give me some idea on. When I boot up Premiere, HDMI video output from my DeckLink Minimonitor 4k card is fine for 5 minutes or so, then shows interference, (like this : https://photos.google.com/photo/AF1QipNmPlIQFAxmXI08aAy9MiZlW3n7z60xxA2K56tk ) then goes blank-ish (like this https://photos.google.com/photo/AF1QipO-3-vyInc24WuC-2nOIrW2GU_Dvxkm68OLvBD_).
And here's the kicker, restart the machine and everything fine for 5 minutes ago and it starts all over again.
Done all the normal stuff: deleted caches and preferences, uninstalled and reinstalled both Premiere and the Blackmagic drivers. Video is garden variety 1080i proves from a BMD disk recorder and has never caused any issues.

Any ideas ? Really need this to be over....

System config:
Mac Pro 7.1
12 core 3.3 Ghz
48 GB ram
Radeon W5700 X, 16 GB
Catalina 10.15.7
DeckLink Minimonitor 4k
Desktop video 12.1
Adobe Premiere 15.2

TOPICS
Error or problem, Hardware or GPU

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