New RX 480 going blackscreen and losing signal.

Hi guys,

Just bought a XFX 480 8gb and it constantly loses signal to monitor when gaming. I've already did the DDU clean install and changed scaling mode to full panel, yet issue keeps ocurring.

I started suspecting on the PSU, but it runs a GTX 970 just fine.

PSU details OCZ500MXSP:

Can anyone provide any help? I'm getting desperate as it was a big investment and my first time with an AMD card.