4k @ 60hz not working with r9 390x and seiki pro sm40unp

mjranew · Mar 16, 2016

Hey guys, just switched from an NVIDIA card that crashed my PC with their new drivers. I have a Seiki Pro SM40UNP 40" 4k monitor, and I am able to get the 4k to work at 30hz through display port, however, when I switch it to display port 1.2 and try to get 60 hz, it crashes and diverts back to 1080p or 4k at 30 hz. It says that there is a link failure.

However, this monitor and cable worked fine with NVidia, so I'm assuming that this is a card and drivers problem. Is there something I'm missing to get it to work?

Thanks!

azzazel_99 · Mar 16, 2016

you say the nvidia card crashed your pc yet here you are having crashing problems with a amd card? You sure it was the nvidia cards fault?

Kevinch · Mar 16, 2016

The 390x need a special adapter to display 4k at 60hz. Check Amd Website for the proper adapter. Not all converter will work. You can chose display port or hdmi 1xxx to 2.0.

mjranew · Mar 17, 2016

azzazel_99 :

Positive. As soon as I updated to Nvidia's new drivers, my computer went into a bsod infinite bootloop and I couldn't get to windows to uninstall the display drivers. The problem is well documented.

And it wasn't the card itself's fault. The card for all intents and purposes worked fine. However, I have had several problems with the last few drivers including the display drivers randomly freezing. That, coupled with a sale on the 390x and the 390x having 8gb of vram which should help out running things in 4k helped me want to try out AMD's side to see if I would have the same issues.

Radeon's drivers aren't crashing my computer, I just can't run 4k at 60hz. I can run it at 30 hz, and my other monitor works fine.

mjranew · Mar 17, 2016

Kevinch :

I'm using a displayport cable. I shouldn't need an adapter if it is going displayport directly to another displayport. My screen is a Monitor, not a TV.

AdmiralDonut · Mar 17, 2016

Have you checked the monitors display settings to make sure it's operating in DP1.2 mode instead of DP1.1 mode?

azzazel_99 · Mar 17, 2016

Thats odd it must be just with certain gpu's. Mine updated to the latest and so did my wifes without issues. Hmm maybe use Driver sweep type software or just do a clean install of windows?

mjranew · Mar 17, 2016

Yep. When I switch it from 1.1 to 1.2, the screen goes blank and switches back to 30 hz

AdmiralDonut · Mar 18, 2016

That monitor has 2 1.2 ports, have you tried both? Also exactly which make and model R9 390X do you have?

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4k @ 60hz not working with r9 390x and seiki pro sm40unp

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