How many displays can an RTX 3090 display at once 4k @ 120?

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n00b
Joined
Jun 1, 2016
Messages
8
I have an EVGA RTX 3090, it has one HDMI 2.1 port, and three DP 1.4 ports. I have a LG CX 48 I use as a primary monitor, it is hooked up via HDMI. I also bought the Club 3D DP 1.4 to HDMI 2.1 adapter for my 65" LG C9, that I'd also like to game on with a controller.

Well, it looks like its one or the other. I can get the Club 3D adapter to output 4k at 120 with just one monitor hooked up, but once the second one come on, and you switch it to 120hz, it can only output a max of 60. Am I correct with this assumption?
 
Joined
May 20, 2016
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DP 1.4 only supports up to 98hz at 4k at 4:4:4 chroma. This is assuming you have no bottleneck from the adapter. Maybe try a custom resolution, say 85hz and see if that passes, or try setting both outputs to 4:2:2 if its a color sampling issue.
 
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Process

n00b
Joined
Jun 1, 2016
Messages
8
DP 1.4 only supports up to 98hz at 4k at 4:4:4 chroma. This is assuming you have no bottleneck from the adapter. Maybe try a custom resolution, say 85hz and see if that passes, or try setting both outputs to 4:2:2 if its a color sampling issue.
For what its worth, I can get 4k @ 120 at 4:4:4 using the adapter, but it has to be the only monitor connected.
 
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