Well I'm only using a HD4850 so I believe 12.6 is the highest I can go to, at least that's all that is offered on the site or if I check for updates in CCC. I obviously want to upgrade to a 7 series card but I don't have the funds right now.
Anyway I adjusted the settings in CCC and everything seems to be back to normal now.
Tried multiplayer earlier, well to say it's a bit of a mess right now is an understatement. I'm not sure why they implemented it so early when collision detection is so poor. Every race I entered was a mess at the start and at various points on the track. I did have some decent battles but for the most part it felt exactly what it was, a very early, pre-alpha online. On the upside lag or lack of it was pretty good, most cars were pretty smooth on the track as long as they weren't touching each other.
The other problem is people didn't seem to realise they're meant to be testing it and were just racing off into the distance, not bothering to try and race other cars. Every time I was in no mans land I'd drop back to let others catch up and then have a race with them, test things out.
I mean I know it's obviously going to get 100x better but it seems rather pointless at the moment.