Clover Noob Installer Help

[o0obenjio0o]

Hey Guys so i have installed OS X Lion - Yosemite many times on my AMD PC BUT i upgraded my GPU to an R9 390 and...... Well it doesn't work well in 10.10 and people say it works better on 10.11.

 

So to get right to the point i created a Clover 10.11 Install USB Stick and when i goto boot from the USB all i get is a black screen with "_    "

Thats it! Yet i can boot my Yosemite fine! 

 

Any ideas why this happens? 

 

thanks in advance!