You are running with frame rates set to unlimited, great! but MAKE SURE you use the 'external' frame rate limiter set to 'exactly' 30 FPS for optimal results. You can download it here
AffinityMask not present. Adding for optimal results with your hardware.
You don't have a BufferPools section!, adding optimized settings.
HIGHMEMFIX was added to your config!
vSync Fix applied to your configuration! (Make sure you set your driver to Application controlled so the option is NOT forced but applied by FSX itself) it will work now.
vSync Fix (Windowed mode) applied to your configuration! (Make sure you set your driver to Application controlled so the option is NOT forced but applied by FSX itself) it will work now.
ALLOW_SHADER_30=1 has been added to make FSX Shader 3 compatible
Setting TextureMaxLoad to 30 for faster texture loading!
SWAP_WAIT_TIMEOUT has been added to your configuration to prevent blurries.
Your Water resolution have been adjusted to prevent white texture flashes.
SmallPartRejectRadius have been added to your config for performance
Adding MAX_ASYNC_BATCHING_JOBS for improved autogen batching performance.
Adjusting SOUND_LOD for improved performance when using AI sounds.
Removing overlay tips to avoid graphics corruption.
MAKE SURE to disable Transparency Anti-aliasing for improved smoothness with your NVIDIA GeForce GTS 250 card.