Oh no, not at all. I haven't had time. I will do so this evening and report back.The tweaks at least do not involve overclocking which was my initial thought (fear?) !JS

Well, I tried some of the tweaks. Not much good. Just added heat and raised the GPU core temp which I like to keep as low as possible, around 41-42C. I know that is exceedingly low, but I just want my card to have a long and cooler life, bit like doing a de-rated takeoff (!)I raised FSAA to 8x and aniso to 16x and it chopped frames by about one third to 14-17 at KSEA with 35% UT AI traffic. I prefer fluidity to additional detail at that ultra high level so I pulled FSAA back to 4x and aniso back to 8x and got my frames and fluidity back fully.After re-setting the card back to nVidia defaults, I took up the PMDG 747-400 into a heavy t-storm at 10,000' and frames fell to 2.8 to 7.7 and the motion was a high speed slide show. I nearly threw up, it was bloody awful! I did later achieve fluid viewing into Kuala Lumpur in the Queen in heavy winds with major rain and some puffy cumulus around, frames averaging 18 on approach into a very dense add-on airport which was good.But the Radeon routinely did just as well and never fell to the range above in a t-storm. I am pretty appalled with the GTO. Very disappointing indeed to me.I am honestly wondering if I dare go the Triplehead route now if this is the outcome and almost feel like yanking the GTO and reinstalling the Radeon card! I probably won't do so right now but when I come back home from a trip to Europe next week, if the GTO card does a repeat of the above as a matter of course, it might not have a future on my system.Clearly, the DELL factory hardware config for this XPS was perfect for optimizing FS9's performance with the Radeon card. I half feel now that I should stick with my setup as it is now, and just be satisfied with a 24" primary and an 18" secondary LCD.JS

JS,>I raised FSAA to 8x and aniso to 16x and it chopped frames by>about one third to 14-17 at KSEA with 35% UT AI traffic. I>prefer fluidity to additional detail at that ultra high level>so I pulled FSAA back to 4x and aniso back to 8x and got my>frames and fluidity back fully.This statement worries me, as over the years I have seen negligible performance hit running any level of AA/AF, from min to max, with anything past a Radeon 9800 / nVidia 6600 on FS9. Something is clearly wrong with your setup. As much as I hate to suggest the obvious, try reinstalling chipset drivers, DX9 and graphics drivers.Gary

I don't think so, Gary. I've reach "maximal burn out" with PC engineering for MSFS over the past several years. I won't reinstal anything especially chipset drivers which I've never dabbled with. Ditto for DX9. I might reinstal the graphics drivers or try a different set, but that is it. FSAA and Aniso have always hit frames and fluidity in my experience.JS

JS,Reinstalling any of the suggested will not break anything and can only potentially improve your situation. Make a system restore point if you are still concerned. Seriously, AA/AF should not impact low end FPS in FS9 if everything else is setup right (I have performance test results to prove this if you would like to see).Gary