Hi Everyone, Just a quick question for anyone kind enough to take a moment to answer: I have a 24" 2.93GHz Core2 Duo iMac (last year's model) that shipped with 2 x 2GB (hence total 4GB) of RAM. I am starting to feel the crunch from more memory-intensive programs, and so the time has come to upgrade. My question is: is there a clear performance advantage to installing matching RAM sizes, as opposed to 2 sticks of different sizes? I noticed that crucial.com currently offers an 8GB kit (2x4GB) for around $260. This is a bit beyond my budget, so I was thinking of instead just getting one 4GB through them for $130, and then mixing it with the Apple 2GB stick which is already in the computer. Would I see a significant performance upgrade with the 6GB mismatched RAM vs. the 4GB matched? Thanks in advance for any advice.