The Centrino running at 1GHz could best a P4 at 1.6GHz. Comparing clock rates got hard as we changed models but I see no reason to worry about 1.3GHz C2D vs the old P4s. The extra core really helps too.
Tomshardware.com has cpu charts if you must do that.
I know there have been various discussions about processor comparisons but I have not found anything that looks like a simple, clear comparison between older and newer processors.
I am looking for a new laptop to use while traveling. I don't need a lot of power because I intend to do most hard core computing on my desktop PC. That said, I'm a bit hesitant to buy a laptop with a quoted speed of 1.3 Gigahertz. My current desktop (P4) runs at about 3 Gig and there are times when it feels painfully slow. If I'm looking at a Core 2 Duo low voltage laptop running 1.3 Gig is there any way to predict how much of a performance hit I'll take when I occasionally have to do photo editing or things of that sort?
I know that I can't compare GHz to GHz but I'm hoping that there is some way to get a feel for the differences.