Software windows 7 goes lag when watching flames of Energy

[lowerlowerhk]

I haven't used Energy when i was stilling using XP. Anyway, whenever we look upon the smoke of Energy Rockets in windows 7, the FPS drops from 58 to 13. I don't think its my hardware problems as i can look at XR2's and DG4's somke without significant lag. What the problem might be?

 

[TSPenguin]

Significantly more smoke?
Compare it to a XR-5.

Also, make sure that you have VistaBoost enabled.