topic Re: Playing Stadia on PC but its not allowing me to select "Up to 4K" as an Option under P in Stadia on Chrome

Playing Stadia on PC but its not allowing me to select "Up to 4K" as an Option under Performance

SSSJDanny — Fri, 14 Aug 2020 04:12:14 GMT

So I am trying to Play Stadia on my PC that is connect to a 4K TV (LG C9) but its not allowing me to select "Up to 4K" as an Option under Performance.

Stadia Pro Account is Active

Tried 2 Different 4K Resolutions: 3840x2160 & 4096x2160

I Did close Chrome Both Times before changing Resolution

I tried using it Both in Chrome and the Installed Stadia Option

Not Sure what other info I can give. Windows 10 (Custom PC) Internet is 500Mbps Down.

Re: Playing Stadia on PC but its not allowing me to select "Up to 4K" as an Option under P

JohnZoidberg — Fri, 14 Aug 2020 15:03:47 GMT

Hello @SSSJDanny

First, 4K support requires a GPU that can do VP9 decoding in hardware in addition to a 4K display. Are you sure your system can do VP9 in hardware?

Next, you mention attaching a TV. Is this the only display attached, or is there also a monitor? I have seen reports of issues with playing 4K on systems that have two monitors attached when one of them isn't 4K. You may be able to get Stadia to recognize the 4K display by making it the primary display if it's currently a secondary. If that doesn't work, you may want to try having the TV be the only display connected.

Re: Playing Stadia on PC but its not allowing me to select "Up to 4K" as an Option under P

SSSJDanny — Fri, 14 Aug 2020 16:22:34 GMT

Ok I'll need to verify that my CPU i7-6700k or GTX 980Ti can run VP9. I read on reddit to

Look at chrome://gpu

And chrome://media-internals while having a tab open that decodes something (e.g. YouTube)

I do have 2 Displays a 4k and Ultrawide Monitor, the 4k is set as Primary, I'll Disconnect the Ultrawide and see if it works after verifying the my system can run VP9.

Re: Playing Stadia on PC but its not allowing me to select "Up to 4K" as an Option under P

JohnZoidberg — Fri, 14 Aug 2020 19:56:28 GMT

It will be interesting to see what Chrome says is possible, but at least from this table: https://developer.nvidia.com/video-encode-decode-gpu-support-matrix it looks like the 980Ti can't do VP9 decode. It also looks like the i7-6700k is Skylake, which, according to this: https://en.wikipedia.org/wiki/Intel_Quick_Sync_Video#Hardware_decoding_and_encoding also does not support VP9 decode. Looks like you just missed it on both your CPU and GPU. Might be time for a GPU upgrade – I have an even older CPU, but put a 1060 in my machine a couple years ago so it can do VP9 (albeit at 8-bit only). I don't try to do 4K, though.

Re: Playing Stadia on PC but its not allowing me to select "Up to 4K" as an Option under P

SSSJDanny — Sat, 15 Aug 2020 03:54:07 GMT

Yeah my system doesnt seem to have the Decoding Hardware for VP9 to run 4K.

I'll probably end up doing a new Build at the end of the year anyway and if they add Mouse and Keyboard Support to CCU I'll probably try that in 4K.

Thanks for the help @JohnZoidberg