garbage display

Hello, First of all, this is my PC specs. CPU - Ryzen 5 4500 GPU - Sapphire Nitro+ RX 580 8gb PSU - Atom B650 80+ Bronze RAM - HyperX Fury 2x8gb Mobo - Asus Prime A320M-K Storage - Kingston NVME 1tb Boot drive - Team group GX2 256gb Now for my question. Why is it that my display becomes...

(excuse me for my bad grammar) So I turned on my pc this morning to play my favorite video game then when windows 10 is booting up it suddenly garbage displayed and btw this is not the first time this has happened to my GPU, the first time it garbage displayed was when I first bought it back in...

Ok so this PC was my first build so I'll apologise in advance for any noobie comments or mistakes. Now I'm not sure if the issues are related so I'll just post it all here. I've been gathering parts for this build since last September (2014) and finally managed to get it built over the summer...