Can it be done?

Solution
The monitor needs to be connected to the GPU to get 144Hz refresh rate. I'd recommend displayport, unless you're 100% sure that the monitor input is HDMI 2.0b (which supports 144HZ) The video ports on the mobo are not going to provide any video signal, because the Ryzen 5 2600 CPU doesn't have integrated video.
The monitor needs to be connected to the GPU to get 144Hz refresh rate. I'd recommend displayport, unless you're 100% sure that the monitor input is HDMI 2.0b (which supports 144HZ) The video ports on the mobo are not going to provide any video signal, because the Ryzen 5 2600 CPU doesn't have integrated video.
 
Solution