Just Back your original FS9.CFG FILE and try these settings below let me know if it helped cheers B)

 

ONCE YOUR VALUES ARE IN LEAVE YOUR FS9 IN GAME SETTINS THE WAY THEY ARE THE VALUES BELOW WILL PRETTY MUCH MAX OUT YOUR SETTINGS AND AT THE SAME TIME GIVE YOU GOOD PERFORMANCE IF IT HELPED PLEASE COMMENT BELOW

 

 

{WEATHER}

DynamicWeather=3

LOADWEATHER=1

MAX_UNLIMITED_VIS=241401

CLOUD_DRAW_DISTANCE=8

3D_CLOUD_PERCENT=100

DETAILED_CLOUDS=1

CLOUD_COVERAGE_DENSITY=7

 

 

{GRAPHICS}

AUTO_LOD=1

DETAIL_TEXTURE=1

WATER_EFFECTS=1

TERRAIN_USE_VECTOR_MAP=1

TERRAIN_USE_VECTOR_OBJECTS=1

EFFECTS_QUALITY=2

GROUND_SHADOWS=0

SMOOTH_VIEW=1

IMAGE_SMOOTHING=1

TEXTURE_MAX_LOAD=512 (this was a very important change - stopped stutters)

COCKPIT_HIGH_LOD=1

AIRCRAFT_SHADOWS=1

LANDING_LIGHTS=1

IMAGE_QUALITY=1

TEXTURE_BLDG=1

TEXTURE_GND=1

TEXTURE_WATER=0

AIRCRAFT_TEXTURE=2

SEE_SELF=1

TEXTURE_QUALITY=3

LOD_TARGET_FPS=29

NUM_LIGHTS=5

 

 

[DISPLAY.Device.RADEON 6750 HD]

Mode=1920x1080

PanelAsTexture=0

TriLinear=1

[DISPLAY]

UPPER_FRAMERATE_LIMIT=42

TEXTURE_BANDWIDTH_MULT=140

 

[TERRAIN]

TERRAIN_ERROR_FACTOR=90.000000

TERRAIN_MIN_DEM_AREA=30.000000

TERRAIN_MAX_DEM_AREA=100.000000

TERRAIN_MAX_VERTEX_LEVEL=20

TERRAIN_TEXTURE_SIZE_EXP=8

TERRAIN_AUTOGEN_DENSITY=4

TERRAIN_USE_GRADIENT_MAP=1

TERRAIN_EXTENDED_TEXTURES=1

TERRAIN_DEFAULT_RADIUS=9.5000000

TERRAIN_EXTENDED_RADIUS=9.500000

TERRAIN_EXTENDED_LEVELS=3.5

 

[sCENERY]

IMAGE_COMPLEXITY=4

DYNAMIC_SCENERY=1

DYN_SCN_DENSITY=5

DAWN_DUSK_SMOOTHING=1

SUNGLARE=1

LENSFLARE=1

FSM_TweakMode=VFR

MAX_UNLIMITED_VIS=241401

3D_CLOUD_PERCENT=100

 

This should be also changed. 241km is to far for sight. best is 33000 max.

And if you have a slower PC than you can reduce the Clouds to 60%

MY PC isn't fast and i get really good FPS on this setup and my stutters improved, but yes your right those values may need to be changed but frankly even with those settings my pc is running it extremely well. B)

 

If it doesnt work for you just simply replace the original CFG File, Ill be honest this worked for me heavy rain clouds at 100 percent (im using pablo diaz HD clouds V2 ) High Resolution Here are my pc specs

 

Intel core 2 duo E7500 2.93GHZ (Not overclocked)

Radeon HD 6750 1GB PCI Express

8gb ddr2

1tb drive