Sorry about the other post with the poll and this one also. I originally meant for the post to be a non-poll one, oops. The link I wanted to share was this one: Click here A visual demonstration/explanation of Hyper Threading vs. Dual-Core, and then combined. Intel has used both in various chips. None of the Intel-based Macs use HyperThreading (HT) that I know of, but the Core Duo chips use Dual-Core technology. This affects anyone using an Intel-based Mac. In the future, perhaps we will see both technologies used in Intel-based Macs.