Hey, With my Quad on the way, I want to make sure I have more RAM on hand when it comes it. I was going to purchase it from crucial.com, but the RAM kind for the G5 is sold out. The one that comes with the Quad is this: DDR2 PC2-4200 CL=4 UNBUFFERED NON-ECC DDR2-533 1.8V 128Meg x 64 They list all other kinds of their RAM that is compatible with the Quad including this one: DDR2 PC2-5300 CL=5 UNBUFFERED NON-ECC DDR2-667 1.8V 128Meg x 64 If I was to buy this one, would it mix with the other stock RAM the G5 comes with. Should I assume that the Quad will just run this RAM at a lower speed to match its stock RAM? Thanks.