Mi GPU not support WDDM 1.3 in Preview ATI Driver. Is this a problem? The Preview Driver of ATI is a good driver? (performance in gaming) Regards.
Im using HD 6850 and not installing any amd catalyst software. I also noticed an increased performance even without installing preview driver
You need a DirectX 11.1 compatible video card for WDDM 1.3. Unless you want to use wireless displays, it doesn't really matter.