weird flickers

PC Build/Specs https://pcpartpicker.com/list/sMLX7W I recently bought the Strix RX580 (slightly used from a friend) and after a couple of weeks it started flickering, but not while in game only in the when on spotify or desktop screen, sometimes it flickers green other times it just flickers...

Hi, i have an AMD a8 6600k cpu with 8gb of cucial ram at 1600mhz and a 1 Tb HHD. Also a 500 watt basic psu. I am buying an MSI R9 380 4GB GPU and what im asking is,do these components go well together or is there curtain things i should upgrage to get a smooth 50-60 fps playing gta v?thanks