[Full-Auto]

I was wondering if I could install a 1GB memory card with a 2GB card in my MB for a total of 3GB. I already have a 1GB card and thought about just picking up a 2GB to stick in there with it, but I didn't know if this was advisable.

[DCJ001]

I've got a May 2007 MacBook which only uses up to 3GB RAM. I installed 4GB due to the extra 1GB didn't cost much more. Here's info about not needing to match pairs of RAM and the performance differences:

Performance testing of Apple MacBook Core Duo and Core 2 Duo Models with various Memory configurationsOtherWorldComputing.com

[mduell]

There's a slight performance penalty in some games (and other applications that need VRAM bandwidth), but 2+1GB is no worse than just 1GB from that perspective.

[Andrew Stephens]

If you've got a MacBook taht will address a max of 3GB then 2+1 will be faster than 1GB by a good margin, especially if you use an RAM intensive apps.

If you can address 4GB then 2+2 will be fastest but 2+1 will still be faster overall than say 1+1

Put as much as you can in. With current RAM prices there's no real reason not to have any Mac (well maybe not one of the new 8 cores), maxxed out.

[Full-Auto]

Oh darn, I just learned my original MacBook 1.83ghz will only address 2GB. So, that solved my problem for me. I just ordered another gig. I can't wait until I get my new MBP from work, then I can give this little guy to the wife.

[legacyb4]

May as well buy a pair of 2GBs; if you sell your Macbook later, you can drop in the old memory and take the 4GB to your new machine.

[Simon]

Originally Posted by Full-Auto 

Oh darn, I just learned my original MacBook 1.83ghz will only address 2GB.

Well a forum search should have led you to this thread
http://forums.macnn.com/69/mac-noteb...-ram-upgrades/

And the very first post will tell you that 2GB is the limit. No offense, but this thread is redundant.

[Chuckit]

As Simon said, this whole topic is covered pretty well in the MacBook RAM sticky.