[katdog5]

You could try this: Altering these settings were the last hurdle that seemed to help me. Took lots of tweaking....I noticed that these settings are diff/higher than mine in your confi. **I did notice a boost when I personally changed this. Didn't seem to alter the graphics at all either using a 285gtx



Specular=1
SpecularLight=0


You could also do a test with changing your setting to ProcessAffinityMask=2 . i think I read ppl have diff levels of success with this setting. (I went from 3 to 2 and seem to have better performance with a quad core)