Originally Posted by RunningRioT
in console(press the ~ key) do this:
also, in your driver settings turn Vsync OFF!
That would change things slightly but I don't know whether that will resolve the problem. I think its a driver problem.
Well for starters you wont see CS FPS ever go over 100 (so just set your FPS_MAX at 100) and if V-sync was turned on, still his fps shouldnt be reaching 30 FPS. For that videocard if V-sync was turned on, his FPS would most likely stay at 60 FPS constant (well it really depends what his "FPS_MAX" is set at).
I remember when I had a Radeon 9000 128MB Pro, it for some reason FPS was very inconsistent (went to really bad levels 30-40 FPS) and the card was definately capable to run CS (LOL, you can just about run it with anything). I could never fix the problem for some reason, that it why I think its most likely a driver problem.