June 27, 201510 yr Author I can tell you my experience. Three days ago I re-installed P3D and my addons (after using FSX-SE for a while). It was my first foray into v2.5. I was getting really crappy performance no matter what I did, including zeroing out most of the sliders. Shader rebuild didn't help either. So I do a full uninstall and cleaned up all the remnants. Then I updated my Nvidia drivers to the latest 353.30. I did a full re-install, one addon at a time, testing a long the way. I used the same Nvidia Inspector settings (4xSGSS mainly). I added FFTF=0.01 and the optimize parts tweak. The FFTF tweak is for the reasons I stated above in my other post. Now I'm running the A2A Comanche, at FSDT KPHX, 100% UT2 traffic, REX, FTXGlobal, and UT2 with 30 frames locked solid. I have terrain and cloud shadows on, water high, scenery/autogen very dense, etc. etc. Very high settings. The point is, sometimes things are just corrupted. If you nothing you do is working and you aren't seeing what you think your system should be showing you, do a clean install. that's what I did today I did it with Advanced SystemCare 8 and CCleaner
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