New iMac memory configs

Question

Hi folks,
My wife is about to retire her G4 15" iMac, and get a new 20" 2Ghz model - I will add extra RAM from Crucial, but I was wondering whether I need to keep the chips in pairs: ie default is 1Gb - should I add another 1Gb, or would a 2Gb be ok? - I am assuming that since it ships with a solitary chip anyway, I can configure them unevenly without any issues!?
Cheers
Adam

Answer 1

Good morning,
Most likely your iMac will ship with dual channel memory, meaning two chips.
As for your other question...
*Q: Do I have to install memory in matching pairs?*
*A: No.*
No, you can install modules one at a time, and you can mix different densities of modules in your computer. But if your computer supports dual-channel memory configurations, you should install in identical pairs (preferably in kits) for optimal performance.
*Q: Will I notice the difference in speed if I use non-matched memory?*
*A: No.*
The performance difference between matched pairs of memory versus non-matched pairs is insignificant in the overall performance of your computer. Apple Discussion Forum Experts generally agree it is better to install the maximum memory possible in your system over a lesser amount of matched memory.
Hope this helps! 
David