Firstly appologies if this has already been discussed elsewhere, but I thought this might be of use to everybody who uses NVidia graphics cards.
I downloaded the latest NVidia Beta driver (301.24) and I have found that it is now possible to set Anti Aliasing from within the NVidia control panel again even with TSX turned on. I put all the AA settings in RW to nil, set AA in the control panel to 2x (I could only use FXAA before, and on a better system you could turn AA higher) and the performance was startling, FPS has improved (on my modest system anyway) and seems a lot smoother, also, using the adaptive Vertical sync means I get a lot less "graphics tearing" as well.
I am using Windows 7 64 bit, on an Intel 2.4Ghz Quad cpu, ASUS NVidia GTX 550Ti Graphics card, and 4Gb ram. I've not tried it using NVIDIA Inspector yet, just the NVidia control panel.
Hope this little heads up may be of use, for those of you vertual pilots out there, it works very well with FSX as well, and I've not had any problems at all with the driver.