Hello, Im a noob in the hackintosh world. And i have a problem with my graphics card.

i followed this guide; [AMD] {GUIDE} Install Snow Leopard 10.6.8 on Gigabyte GA-990FXA-UD3 - Tutorials (The Genius Bar) - InsanelyMac Forum

I actually i have a ga-990xa-ud3

i followed all the steps. i got everything working except the graphics.

When i try to GraphicsEnabler=yes then the screen goes black-no imput. and the cards fans max out. and then nothing happens.

maybe i have a issue with the chameleon bootloader - how i fix or reinstall it?