2 GB memory stick run with 1 GB memory stick?

I'm looking into the possibility of maxing out the memory on my 2nd gen Macbook from 2 gb to 3gb, and have one question left.
Would the fact that I'd have a 2gb Crucial memory stick running next to a 1 gb Apple memory stick throw off the optimization of the system so much that it would just be better to stick with the two apple issued 2gb memory sticks?

First Magus wrote:
It will not hurt anything as long as they are the same speed. I did it when I first got my MacBook. I installed a Crucial stick next to an apple supplied stick and it worked like charm. I wanted to add I used it for over a year like this with no noticeable problems while using programs such as Photoshop CS3.
You know - after I read the Santa Rosa chipset datasheet, I'm starting to wonder even about this. Intel claims that the GMA965 is capable of controlling either "533 or 667 MHz" memories - meaning PC2-4200 or PC2-5300. A cursory reading said that a full dual channel setup is achieved by simply matching the sizes, and that if the speeds were not the same, it would revert to the lower speed on both channels. However - I haven't heard of anyone trying out a PC2-4200 module. My curiosity is now piqued, and maybe I can try that tonight with a Samsung PC2-4200 module I have lying around.
Of course Apple could configure it such that only PC2-5300 is acceptable, but I didn't go so far into the datasheet to see what was in the configuration registers.
Of course we've recently had the entertainment of someone claiming dire consequences from mixing and matching memory brands, but I think it's safe to say that shouldn't be an issue.

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