Zend certified PHP/Magento developer

Grey Screen on boot from GPU on PC

New to Manjaro, previously have only used Debian-based distros so sorry if Im missing something obvious. I have an AMD rx 560 that was tested and working before I bought it but whenever I try to use it, grey screens. Even after installing the recommended open-source drivers and proprietary drivers it still doesn’t work. I updated and downloaded all of the necessary firmware and then some. Still nothing. And it doesn’t matter if I use the display port or the HDMI port, I still get a grey screen with a green outline for a few seconds then no signal. Is this a driver issue or a hardware issue?