I googled and found this:
https://www.amd.com/en/support/kb/faq/gpu-754
So my question, how to do this on openSUSE tumbleweed? 
AOC 24 " 1980 * 1080
Monitor support it, so does my vid card Rx 570. That is the only part I do understand.
Just tried a movie and saw screen tearing, as I am used too on Linux but now wondering if this can be fixed with AMD free sync?
Last time I dove into this subject people ( AMD and Nvidia) blamed the X server for the screen tearing.
Hi
Are you using a display port?
I see the following to check card/monitor;
Please note that you must have a Display Port Freesync compatible monitor.
FreeSync over HDMI is not currently supported
To verify that your system supports FreeSync, please follow these steps:
[ul]
[li]Run '[i]DISPLAY=:0 xrandr --prop[/i]'[/li][li]The output will show EDID information for all displays. Noteworthy parameters are the following:[/li][li]freesync_capable[/li][LIST]
[li]0 = display does not support FreeSync[/li][li]1 = display supports FreeSync[/li][/ul]
[li]freesync[/li][ul]
[li]0 = FreeSync is currently disabled[/li][li]1 = FreeSync is currently enabled[/li][/ul]
[/LIST]
Have to figure how to use that commando and will, but for now to answer the connection part.
guus@linux-2ls4:~> xrandr
Screen 0: minimum 320 x 200, current 1680 x 1050, maximum 16384 x 16384
DisplayPort-0 disconnected (normal left inverted right x axis y axis)
DisplayPort-1 disconnected (normal left inverted right x axis y axis)
DisplayPort-2 connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
1920x1080 60.00 + 74.99 50.00 59.94
1680x1050 59.95*
1280x1024 75.02 60.02
1440x900 59.89
1280x960 60.00
1280x800 60.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08
HDMI-A-0 disconnected (normal left inverted right x axis y axis)
DVI-D-0 disconnected (normal left inverted right x axis y axis)
guus@linux-2ls4:~>
DISPLAY=:0 xrandr --prop
DisplayPort-2 connected primary 1680x1050+0+0 (normal left inverted right x axis y axis) 531mm x 299mm
EDID:
00ffffffffffff0005e36a245a100300
1b1d0104a5351e783bf6e5a7534d9924
145054bfef00d1c0b300950081808140
81c001010101023a801871382d40582c
4500132b2100001e6842806a70382740
08209804132b2100001e000000fd0023
4c535311010a202020202020000000fc
003234363047350a2020202020200105
02031ef14b901f051404130312021101
230907078301000065030c0010008c0a
d08a20e02d10103e9600132b21000018
011d007251d01e206e285500132b2100
001e8c0ad08a20e02d10103e9600132b
210000188c0ad090204031200c405500
132b2100001800000000000000000000
00000000000000000000000000000031
GAMMA_LUT_SIZE: 4096
range: (0, -1)
DEGAMMA_LUT_SIZE: 4096
range: (0, -1)
GAMMA_LUT: 0
range: (0, 65535)
CTM: 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0
0 1
DEGAMMA_LUT: 0
range: (0, 65535)
TearFree: auto
supported: off, on, auto
vrr_capable: 1
range: (0, 1)
max bpc: 8
range: (8, 16)
underscan vborder: 0
range: (0, 128)
underscan hborder: 0
range: (0, 128)
underscan: off
supported: off, on, auto
scaling mode: None
supported: None, Full, Center, Full aspect
link-status: Good
supported: Good, Bad
CONNECTOR_ID: 67
supported: 67
non-desktop: 0
range: (0, 1)
1920x1080 60.00 + 74.99 50.00 59.94
1680x1050 59.95*
1280x1024 75.02 60.02
1440x900 59.89
1280x960 60.00
1280x800 60.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 66.67 60.00 59.94
720x400 70.08