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Apple TV working, but not in 4k

Joined
Sep 22, 2010
Messages
170
Motherboard
ASUS PRIME Z390-A
CPU
i7-9700K
Graphics
Vega 64
Hi, I have an iMacPro1,1 setup and DRM is working fine, I can watch streaming Apple TV no problem.

The issue is the content isn't in 4k. It looks grainy, like 1080p or maybe even 720p. How can I force Apple TV to stream in 4k?

I have a Planar IX2790 5k connected to a Vega 64 via DisplayPort.

Btw, I tried downloading a 4k TV episode but I don't think it downloaded the 4k version (was too fast). It also gave me an error that the downloaded content can only be played on an HDCP monitor.

Is 4k possible? Don't iMac 5k's stream Apple TV in 4k? Why wouldn't it work on my setup? DisplayPort the bottleneck?
 
Joined
Sep 22, 2010
Messages
170
Motherboard
ASUS PRIME Z390-A
CPU
i7-9700K
Graphics
Vega 64
was hoping someone might have a suggestion on how to remedy. thanks!
 
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