found this (It's what boosts it up to $700)
Intel(R) Core(TM) i5-480M Dual Core Processor (2.66GHz, 3MB L3 Cache) with Turbo Boost up to 2.93GHz
anyways what is ghz stuff all about? What is the point
If you are keen on a laptop Alienware M 17x is the one for you ok, but you will need $1500 to purchase one. That's the only type of laptop if you want to be guaranteed SSE will run on a laptop. If you don't have that much money, you will have to forget completely about having SSE on a laptop.
I have found this topic about a this guy who also is in a similar situation and wondering about ghz, http://uk.answers.yahoo.com/question/index?qid=20071111040842AAH6Nll. The next article here http://www.wisegeek.com/what-is-ghz.htm tells you what is GHz. SSE is tougher on computers than any other game out there, this was the only way to put things together for this game by the looks of it. I mean they even cut back on eye-candy detail which I am not happy about, but they had to do it because they belive that 90% at least of the buyers don't have a good computer.
I really don't want you to get SSE and then wake up it has all these problems, crashes, screen freeze, Blue Screen of Death, errors.......etc.Only thing I would suggest is keep on saving up, if you truly want to be able to run SSE