Motu Ultralite Serious Cpu Issues! Options

[aeccoin]

I'm using a macbook pro with the OS X 10.4.8 (as i hear it's better for audio than 10.4.9) and I have SERIOUS CPU issues with the MOTU and Cubase SX 3. When I have the sample rate low, recording is fine, HOWEVER the second I add ANY kind of processing (even crappy built in equalizers in cubase) the CPU goes off the wall! I have to change the sample rate to 512 from 192 and even then the CPU is at about 80% and I'm only running 3-8 audio tracks (that's right not even MIDI, not to mention half the tracks are frozen) with very minimal processing. If i add about 3 different processing items (e.g. a compressor, equalizer and some reverb) the CPU goes so insane that my audio is inaudible and I have to up the samplerate again, this time to 1024 !! THAT'S INSANE. Even then the audio is barely audible and I just don't know what to do. I've done all the troubleshooting I can think of and nothing works.