4k with DisplayPort?

[VincentHanna]

Someone told me they have a Panasonic AX802b TV, which is a 4k Ultra HD TV with both HDMI 2.0 and DisplayPort 1.2

They have an AMD R9 290x and said

Word of warning, the TV is recognised as 2 different screens via displayport and the catalyst software automatically "glues" the screens together

Is this the case for all DisplayPort screens at 4k? It seemed a bit strange to me as AFAIK it's not a tiled display (as was the case for some early 4k PC Monitors)

 

[Orangey]

http://community.amd.com/community/...ebrating-a-new-generation-of-ultrahd-displays

 

[JediFragger]

I was considering that route, thanks for the info as I'm now glad I didn't!!!!

 

[///Rage]

Why not? Perhaps I didnt really understand that link but whats the issue?

Asking as im considering that very same TV my self.

 

[VincentHanna]

I'm not really understanding it either.

Someone told me DP 1.2 doesn't support SST at 4k, so everything is tiled? Yet I know there are 4k monitors available now that don't act as tiled displays, like the Samsung U28D590D

I found this:

The bigger issues have to do with the fact that today's best 4K displays, those that support 60Hz refresh rates, usually present themselves to the PC as two "tiles" or separate logical displays. They do so because, when they were built, there wasn't a display scaler ASIC capable of handling the full 4K resolution. The Asus PQ321Q can be connected via dual HDMI inputs or a single DisplayPort connector. In the case of DisplayPort, the monitor uses multi-stream transport mode to essentially act as two daisy-chained displays. You can imagine how this reality affects things like BIOS screens, utilities that run in pre-boot environments, and in-game menus the first time you run a game. Sometimes, everything is squished up on half of the display. Other times, the image is both squished and cloned on both halves. Occasionally, the display just goes black, and you're stuck holding down the power button in an attempt to start over.

http://techreport.com/review/26279/amd-radeon-r9-295-x2-graphics-card-reviewed/3

Is that the case for the Panasonic AX802b (800u in America)

 

[Mr. May]

Damn glad I didn't buy that I was seriously considering this as I could have use my 290x's on my tv

 

[///Rage]

Ok.....still not seeing anything that affects image quality, input lag or FPS.

 

[VincentHanna]

Ok.....still not seeing anything that affects image quality, input lag or FPS.

In reference to?

 

[andybird123]

I'm not really understanding it either.

Someone told me DP 1.2 doesn't support SST at 4k, so everything is tiled? Yet I know there are 4k monitors available now that don't act as tiled displays, like the Samsung U28D590D

I found this:



http://techreport.com/review/26279/amd-radeon-r9-295-x2-graphics-card-reviewed/3

Is that the case for the Panasonic AX802b (800u in America)

DP1.2 *does* support SST at 4K, the very early 4K monitors did not, the ones that appeared later like all of the 28inch ones (the samsung included) do so via SST

I can't find anything specifically stating if the panasonic TV's are MST or SST though

the DISPLAY isn't tiled, it is how the GPU sees the monitor/TV, it is one physical panel but some monitors have 2 controllers stitched together, so you have

GPU ------ SCALER-SCALER ----- display

the GPU sees the 2 scalers and thinks it is talking to two screens, though each scaler controls half of the display each, hence why GPU's tend to get a bit confused when doing it