I would love to try predicting but will be way off I'm sure. There are simply too many variables all of which require quite a bit of trial and error or research and the game is annoyingly difficult to get used to. e.g. Video memory should be default, HT should be off, Post processing makes it look blurry. Suffice to say that you probably won't find it much fun on that rig. I didn't enjoy it much on the maximum settings I could play at with a 920 at 4ghz and 2 overclocked 4890's (not that far from your current rig but 2gb memory makes a healthy difference). Single player isn't so bad but in towns with draw distance 1500 metres you'll be lucky to stay in your 20's and bear in mind draw distance can and does go to 10,000 metres. I have the game on my intel ssd drive (not that fast I know) and OS on vertex 2. A ramdisk is probably the best solution BUT don't imagine you will make her beautiful (and she is). And you have a beefy contemporary rig!