Get a better performance with audio interface?

Hi all.
I got a silly question. I run Logic 7 on a Powerbook G4 12" with 1.33 Ghz and (only) 768 Mb RAM and a (hard to built in) 160 Gb Harddrive.
After having often the "Disk is too slow..." message I was thinking about buying a external audio interface (presonus firebox).
My simple question is: does an external audio interface give Logic (or CoreAudio) more free DSP-Power? So that maybe I got a better performance? Or do I need to get something like a TC Powercore Firewire?
An answer would be great ... otherwise I have to sell my nice and small 12incher and buy an Intelbook ...
Thanks. Frank.
Powerbook G4 12" 1.33 Ghz Mac OS X (10.4.8)

A new audio interface won't help.
You should start by getting an external 7200 RPM Firewire drive to put your audio on. That right there will help, especially with higher track counts.
Secondly, get more RAM. 768 of RAM is borderline for Logic. I always recommend at least 1 gig. Go ahead and max out that Powerbook to 2 gig of RAM, if you can.
All that to say, an Intel mac would be a huge improvement over the Powerbook. And if you do go that route, still get an external FW drive for audio, and as much RAM as you can afford.

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