Hi Ben, I had the same question for Logic a few weeks ago. I phone up the tech support team at Soundtech, and the reply was that Logic itself is unable to take advantage of a Dual Processor, but if you run third party pluggins this will be able to use the second Processor. You should have a look at some very recent messages regarding memory over 512k as there appears to be issues with this and Logic on a PC. Blayz