I've only got a low wattage PSU in my secoundry system otherwise I may of kepted it in and I can't fit it in my main rig in my sig, anyhow the effects it give you are very small, infact the way the liquid just vanishes into fin air practicly straight away when you shoot the barrels is just pure annoying, thats not the way liquid acts, I'd rather have no liquid at all if it looks so silly, I'm suprised you don't get no frame drop, keep a keen eye on how low the fraps counter goes down when you blow up a crate using a fire ball attact (not sure of proper name, fire shooting from arm thing'ma'jiggy), then do the same with the card out the machine and retest, I don't suffer any noticeable slow down, I just lose about 10fps blowing things up with PhysX enabled, if I did'nt have fraps telling me what the fps was I would'nt have noticed the difference.