Enthusiast is like very high I think, but you can use it on DX9 now and not only on DX10. View

64:1 AF is normal 16:1 AF but the oversampling forces the graphics card to caluclate four times the amount. So the 64:1 AF is calculated and then the result is downsampled to the displayable amount again. It looks a lot better than normal 16:1 AF but it costs a lot of performance. View