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4k@60 stopped working on CAC-2070 after changing cpu/mobo

Updated on 30-01-2020 in Adapters and Cables
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5 on 29-01-2020

Hi, I used CAC-2070 display port to HDMI 2.0 active adapter to get 4K @ 60hz flawlessly on my old sandybridge system (i7 2600, Z77) for years.

Yesterday I upgraded to Ryzen system (change to Ryzen 3600, B450 and new DDR4 of course). GPU is still the same R390. Windows is also the same (win10 pro 64bit – didn’t reinstall from fresh but I bought new activation key since old key couldn’t be used when changing hardware significantly), just reinstall the gpu driver. HDMI cable, TV settings, etc are also the same. Even the HDMI port used is also the same.

However I can only select 30hz on display adapter properties if I choose 4K resolution as if it’s still HDMI 1.4. I can’t find any other way to change refresh rate.

Anybody knows what’s happening here? and what’s the solution?

thanks!

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CLUBBIE 2 on 29-01-2020

Hi,

First of all congratulations with that purchase, some powerful hardware 🙂

Could you start by checking if all windows updates are installed, this sometimes is an issue.

you mentioning the installment of GPU drivers for the R390, might this have been a newer driver ? 

 

VJL on 30-01-2020

Thanks!

I just update the windows, still there’s no 60hz option.

I used the same gpu driver before I change cpu/mobo, just reinstalled (repair). 19.2.2 or something.

 

 

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VJL on 30-01-2020

oh I just found this

https://community.amd.com/thread/246174

I’ll test tonight with much older driver then. Hopefully it works.

 

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CLUBBIE 1 on 30-01-2020

Hi VJL,

Thanks for sharing this information hope it works please let us know. 

Goodluck 🙂

VJL on 30-01-2020

I tried the custom resolution exactly as suggested without changing the driver and it works! there’s 60hz choice in display adapter properties.

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