If I understand this correctly, a processor that has 1.6 Ghz in a Desktop will run faster than the same processor labeled 1.6 Ghz in a laptop. Is that correct? And if so, here's my problem: I want to buy a laptop. My desktop has 2.80Ghz which easily handles the stuff I need it to - perhaps it's more than I need -- I can't be sure (I just know it works). (I have kind of a big program that allows me to trade futures in real time.) I need to be able to know how big of a processor it will take for a laptop to handle the same thing. And apparently the 'dual core' adds somthing to the mix. Is there a conversion chart somewhere, or even a rule of thumb, that I can use to help me decide how big and what I need to buy? Thanks again to all for your help.