I have an R9-270 with an i5-2550 stock and I was amazed how well it ran yesterday. I play it every 3 months or so, I can't keep up with the changes. But I went in yesterday and put in 5 hours. At the end of the night, I wanted to do some screenshots, so I set up a GT3 race at Spa with 18 cars. And at the start, I was getting zero lag or stuttering. I was actually shocked at the frame rate. I know the little FPS guage in rFactor says I can get 120 FPS, but it never, ever looked as good as this. I have settings on high but no AA since I'm pushing 2500x1440. I think there's been some serious optimization going on. It used to be rough in the rain, so that'll be my next test. But boy does it work well.