Do you have the patience to set up your nVidia card properly? Our very own SYN_Jedders has done all the hard work optimizing already, so you just have to follow these directions.

With the interest expressed via PM in receiving the contents of this thread in an offline format, here is a MEDIAFIRE LINK for a PDF document:
http://www.mediafire.com/view/?psq20fzuaa8csba
Seriously, my cockpit needed a good steam cleaning after Jed walked me through this nVidia set up, and I only have a 560Ti 2 GB card. Your mileage may vary though... Be warned, it has several steps, but nothing to worry about and definitely worthwhile spending the 3-5 minutes to set up.
Also, before you start, take screen shots of your current GFX variables so you can return to them.
This is for your own good; we cannot take responsibility for these settings if you need to return to your old ones. That said, I am confident that you WILL see an improvement, so much so I spent the time to pull these screenshots together and compose this tutorial.
ONE
Download and install nVidia Inspector http://www.guru3d.com/files_details/nvidia_inspector_download.html. Guru3D is a very reliable source.
nVidia Inspector can be placed anywhere on your C:\ drive, makes no registry entries (that I know of), and is a simple drag-and-drop uninstall.
Below is a screenshot of Inspector when you open it. Click on the tools icon (red oval) to open the elevated (more advanced) profile settings window, and move on to step TWO.

TWO
Below is the default screen for GLOBAL_DRIVER_PROFILE when you click on Inspector's tools icon.
On the top menu/tool bar, click the green nVidia icon 3rd from the left (red oval); this will "Restore current profile to NVIDIA defaults", just to make sure you are starting with a clean slate. Now click "Apply changes".

THREE
Click the down arrow beside the 'Profiles' window to the top left, and navigate to the 'Rise of Flight' profile, select, and click.
Below is the complete list of all graphics variables assigned to RoF. Save the PNG image linked below if you like, or use the blue slider here to scroll and please take the time to ensure your entries match every line here. Change entries to these if they are different (a few will be your own choice -- SLI settings for example...), then 'Apply Changes' to the right.
If you are not registered on this forum you cannot see the attached Profile below.
<<< Download Mediafire linked document here: http://www.mediafire.com/view/?8maafy9wpmg8cy5>>>
FYI: the most important setting changes in next post below...