Hi there, first post. I'm a long time musician, fairly new to electronic music production. I'm getting into my first 20-30+ track projects, with multiple instances of Kontact instruments, Soundtoys plugins, Sylenth1, Razor, etc. I find that even one instance of NI Razor can cause CPU overload immediately. Wow. Anyway, I did a little research and some folks said I should switch to 64 bit, and I did that but it didn't make much of a difference. Activity Monitor still shows Logic using 120% (huh?!) of my Memory. Also, now most of my VST plugins are 32 bit, which still works in 64 bit Logic of course, but the 32 bit bridge server keeps crashing every time I try to play my track. If I close any open apps, restart the computer, and open Logic, I can play the track for a little while before I start seeing the System Overload error message. But it always happens eventually. Sometimes the track won't even play at all, and I spend considerable amounts of time staring at the colorful twirly thing which all mac users love so much. Now don't kill me when I tell you I only have 4 gb Ram on my mac. I should have more right?? I hope the answer is that simple! Thanks for any help or ideas! -Ben Logic 9.1.5 64 bit, Late 2008 MacBook pro 2.66 ghz 4 g ram. Running Lion.