RX 580 Nitro + 4GB and 4k monitor

[phpsaux]

I was living a dream, with my GTX 970 in the High Sierra. Then I had an opportunity to buy a RX 580. Thinking it would be even more compatible with the macos. Until I get home, and I install it on my machine.

I use a 4k UHD Philips monitor. But in RX 580 it does not work on macos, only on windows. The strange thing is that on windows works 100%, 4k in 60hz on HDMI 2.0. If I put in my old Samsung fullhd 27, it works normally. 1080p 60hz

Video with the problem ...

https://www.youtube.com/watch?v=o5NHWho79_0

As you can see in the video, Mojave recognizes it as a RX 570. And then I discovered this ... https://www.extremetech.com/gaming/279010-amd-launches-new-rx-580-with-fewer- stream-processors

Monitor

https://www.philips.com.br/c-p/288P6LJEB_57/brilliance-monitor-lcd-ultra-hd-4k

My setup.

Gigabyte Z97-D3H

i7 4970

RX 580 Nitro + 4Gb

16 gb corsair Vengeance 1866 Mhz

1 TB 7200 rpm

Corsair Neutron Gtx 120gb

Corsair CX750

Corsair H90 - 250

Corsair 500R - 350

[MaLd0n]

in macos, 4k 60 only in DP