I am going to upgrade my laptop to 4GB of Memory soon. I was wondering which would be a better performance boost. I am either going to get 2x2GB @667 4-4-4-12 or 2x2GB 800 5-5-5-15. I don't know which would be a better use of my money. They are both about the same price.
Get the 667 because as far as I know, your system can not use the 800 and would just clock it down to 667 anyway. The timings on the 667 are better as well. What OS are you using (Vista or XP and 32 or 64bit)?