Does type of Memory matter in a Mac?

I have a 1GB MacBook on it's way, and I was wondering, what if I we're to want to upgrade something to 2GB or even 4GB? Does it matter which brand of RAM you install, or does Apple RAM itself perform better on Mac's?

jay84h wrote:
If there is no Apple RAM, than what is this? http://store.apple.com/1-800-MY-APPLE/WebObjects/canadastore.woa/wa/RSLID?nclm=1 977F78C
That's RAM that Apple has purchased from a supplier. Apple (like most computer makers) buys from "1st tier" memory manufacturers like Samsung, Micron, Hynix, Elpida, Qiomonda, or Nanya. That will typically be a module that is labelled by and has ICs identifying them as made by one of these manufacturers. For example, the 2 512 MB modules that came in my MacBook have ICs with the Hynix logo and a specific Hynix label on the module. This would be opposed to something like a Kingston memory module with (for example) Micron-identified ICs, a 3rd party circuit board, and a Kingston ID/warranty label.
I believe that Apple sold RAM carries their standard 1 year accessory warranty and/or would be covered under AppleCare if you have it. Most 3rd party memory is either warranted by the manufacturer (like Crucial) or seller (i.e. OWC buys modules, slaps their own label on them, and provides their own warranty).
If you insist on getting modules similar to what Apple buys, Crucial typically sells Micron (as their retail division) and some retailers have fully-branded Samsung modules. Most of the other 1st tier memory manufacturers don't seem to sell a whole lot that ends up in direct retail channels. They seem to prefer selling their modules directly to OEMs and their ICs to memory assemblers (Kingston for example).

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