Gigabyte RX570 4Gb graphics glitches out of the box 1 of 2- Fortnite

Generally happens in games or when browsing Have tried - uninstalling and reinstalling all drivers to latest - Updated Bios to version f5 in my B360 Aorus Gaming Motherboard - Moved the card to the second PCI-E slot. When I did that, I actually got rainbow blotches while in Fortnight at the bottom half of the screen. From what I have read, this may be a VRAM issue. I will be returning the card for a replacement