Hello,
There are plenty of lag concerning topics,but
I decided to create my own (to get more attention 
and to be more specific 

 )
My system is Windows XP Athlon +2.7GHz 768 RAM
nVidia GeForce FX 5600 128MB. I fit in the min. req.
And I have quite more RAM than needed so Penumbra 
SHOULD go smoothly,unfrotunately it isn't. I get lag 
often even when starting on a fresh and cool PC (so 
overheating shouldn't be the problem) I tried minimum 
requirments,treid suggested,tried various settings actually-
nothing worked...I tried downloading older nVidia drivers (84.21 iirc )
nothing... What is my problem ? I had none with Overture...
P.S I was not able to find that "Threading optimization " or what ever 
it is called... Any suggestions ?