This forum is manly consisted of fellow gamers. Yes on occassion you will see someone from AMD comment on somebody's post which is on the edge. The user like to here your issues and will try to help. Sure you are allowed to have an view that vista should be supported. As technology goes forward some OS are stuck back in time. Sticking with Vista is your choice and changing card may address the issue right now, but you may find yourself right back with a new set of issues later. Like XP, Vista will soon be like the dinosaurs, extinct and dead.
AMD A10-5800K, XFX 7850 Ultra OC Edition 975MHz, 16GB RAM, Win 8.1 Pro 64 bit, MSI 7778 motherboard, 500W PSU, HP P7-1235, CCC 13.12 WHQL