I wonder if anyone else has tried running the overdrive feature on there cards. I enabled it on 4.12 and it produced a currupt display my heart dropped and I thought I had ruined my card. So I rolled back to 4.11 and still the same I was so sure the card was toast so I got an RMA to return it. I read here about glitches which I had not had. But I rolled back to 4.10 and hey it works fine. So now I ask have you tried and does anyone know how to fix it.