When I play Voltz, I get huge CPU usage - the process javaw.exe uses up to and including 90 CPU in the lag spikes. I only recently started playing Voltz, after having played Tekkit an awful lot. Tekkit used to lag too, but it doesn't after turning off MAtmos.
I have turned down all the video settings: render distance is short (I can't bear playing on tiny), graphics are fast, performance is max FPS, OpenGL is off, I even resorted to turning off clouds in a desperate attempt to stop the lag. The lag spikes happen approximately once per minute and last around two seconds where my framerate drops to nothing and sound breaks up. Is there a specific mod that could be causing the lag? If not, how can I make the game playable? (By the way, I always change the process priority to high and the spikes still happen).
I am on a Windows Vista 32-bit laptop.