I know there have been RAM questions here, but I haven't found one that specific to my question....CLOSE...but I just wanna be sure. Q: I bought a Nehalem Quad-core 2.66. I understand I am able to purchase 4GB Ram chips for my machine(up to four of them). Here's my question...My machine came with 3x1GB Ram. I want to purchase 2x4GB and keep two of the 1GB chips, so that my resulting configuration will be 2x4GB, 2x1GB. Is this possible? Is this allowed? I ask this because several websites I've been to only offer the 4GB chips in clusters of either 1's, 3's, and 4's.....somebody please set me straight. I don't wanna waste my money if my 2x4/2x1 plan isn't possible. Cheers!