Decklink 4K Extreme slowdown Resolve in 4K

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macemace

  • Posts: 1
  • Joined: Fri Jan 27, 2023 11:26 am
  • Real Name: Mauro Vicentini

Decklink 4K Extreme slowdown Resolve in 4K

PostFri Jan 27, 2023 11:52 am

Hi,
i have a issue with the Decklink 4K Extreme (first model 6G).
I can only play clips @25fps in HD/2K,
no way to go @25fps in UHD/4K.
If i remove the decklink (or setting no output monitor on preference) i can play all resolution with no issue, different codecs @25fps (also with the clean feed on).

I have a very old system but it covers my needs (until now), I think I'm not the only one:
MacPro 5,1 2010
Os Big Sur 11.6.6 on SSD
Radeon VII 16gb
Ram 96 gb
Some WD Black disk in raid 0
Mini panel.
Eizo 319X for 4K DHMI, Sony PVM Oled for HD SDI.
Of course i was forced to use Opencore for setup the OS on this machine.

My software is Resolve 18, for Video Desktop i tried 11.7 and 12.0.
I tried Decklink board in in slot 2 (4x 5GT/s) and slot 3-4, with and without any other board (except Radeon VII), same issue.
it seems that the card becomes a bottleneck for data flow, not for the calculation.
Could it be a hw problem with the board?

Thanks!
Mauro

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