From my experience this could be really any number of things, it will almost certainly be one of the core components (RAM, GPU, CPU, PSU, Motherboard). I checked your motherboard specs and it doesn't appear to have an onboard GPU, is this correct? I was going to suggest attempting to run the machine without the AMD GPU connected to see if that may be the issue. Are you able to test the GPU in another machine, or, test another GPU in this machine? If you check the Windows Event Viewer (WinKey + S, enter "Event") does it have any pertinent error logs?