I would like to upgrade my memory too. I have a 2.5ghz MBP with 2 gigs of ram. I was wondering if I can just buy a 2 gig stick from crucial and put it in my mac. Will the lat 5 2 gig stick from crucial play nice with the 2 gig already in my computer? Thx.
Apple uses RAM they buy from Samsung, Hynix, Micron and Elpida just like the reputable third party RAM suppliers use.
There will be no performance difference between 2 brands of RAM that are tested and 100% compatible. (with the exception of the more expensive CAS Latency 4 RAM from OWC and Corsair, which gain about 1%)
OWC, DMS, Crucial and other RAM companies that support Macintosh are the best bet. NewEgg and Fry's and other discounters don't provide support and leave it up to you to choose the correct RAM. This can work for you if you know what you need and spot a sale, but watch for shipping and restocking charges if you get RAM that doesn't work.