J'ai une solution mais je te conseille d'être bien reveillé et j'espere que tu as d'excellent yeux
VOici un tweak pour Mass Effect 2, les lignes sont à modifier dans la dossier C:\Program Files/Mass Effect 2\Biogame\Config\PC\Cooked\Coalesced.
Trilinear=TRUE-->was false
- UseVsync=FALSE-->was true
- MaxSmoothedFrameRate=300-->was 62
- MaxTextureSize=4096-- was 2048
- MinShadowResolution=64 (more can make some glitch)--> was 32
- MaxShadowResolution=2048 (more can make some glitch)--> was 512
- MouseSensitivity=0.5--> was 1.0
- bEnableMouseSmoothing=FALSE--> was true
- MaxAnisotropy=16 (6 or more can be set)--> max is 16
- MaxMultisamples=16--> was 1 / max is 16
- EnableHighPolyChars=True--> was false
- bSmoothFrameRate=FALSE--> was true NO FPS CAP
- SmoothFrameRate=FALSE--> was true no FPS CAP
-
TEXTUREGROUP_Character_Spec=(MinLODSize=32,MaxLODS
ize=512,LODBias=0)--> was 256
- DisplayGamma=0.5--> was 2.2
- Brightness=1.2--> was 1.0
- SkyBrightness=0.20--> was 0.25
- LensFlareMaxOcclusionIncrement=0.25--> was 0.15
- ShadowFilterQualityBias=2--> was 0
- ShadowFilterRadius=5--> was 2
- ShadowTexelsPerPixel=4.000000--> was 2
- FoliageDrawRadiusMultiplier=2.000000--> was 1
- ParticleLODBias=-1.0-->was 0
- SkeletalMeshLODBias=-1.0--> was 0
Personnelement je n'ai pas eu le courage de chercher dans toutes ces lignes de codes donc bon... 
La source: http://forum.canardpc.com/showthread.php?t=43724