> powerful as Xbox 360, but not as powerful as PS3.

From what I've heard they are both about on par when it comes to power, and there only about 2.5x the power of the original Xbox (well behind Moores' Law if you compare to current PCs).

I found this article to be the most in-depth: http://www.anandtech.com/video/showdoc.aspx?i=2453

Lando242