If you're using a non-ATI (non-reference) card make sure to use the drivers from that card's manufacturer. I had the same issue with a non-reference MSI card - I had to use MSI's drivers.
.....they dont make there own drivers
I didn't say they made their own drivers entirely by themselves. They most likely started with ATI's drivers and customized them to work with their card's design.
What I said is that ATI's drivers will not work (since the card is not an ATI-reference one). So you have to use the drivers that are customized for that card.