Ordered it from an online store. Talked to them now and will just send it back to them and they'll take a look at it.
But bummer, was pretty excited about it. And now that particular card isn't in the store anymore, so not sure what they'll do if they have to send a replacement.
I used to play on an RX 480 (as per title) and got a Vega 56 during Black Friday ( https://www.asus.com/us/Graphics-Cards/ROG-STRIX-RXVEGA56-O8G-GAMING/ ).
Only got around to plugging it in yesterday, expecting it to not be too difficult to get running. No such luck. I have no signal...