Hey guys! Moose the meat popsicle here, and I have what may very well sound like a stupid question. Again. So I have an Asus P4S800D-X mobo, and "building" my first system from the proverbial scratch. I've scoured the interwebs, yet cannot find a definite answer to this possible strategy. I have bitten the bullet, and bought some matched pairs of OCZ Platinum RAM off the ebay. I'm an extremely cheap bastard, so I will usually wait for months to get a deal. There's no way I could pay retail for OCZ, not that it's not worth it, I'm just too cheap. And my mobo has 4 slots. 2 blue, 2 black. I understand that I'm to put the 2 matched 512Mb(stop laughing!) sticks in the blue slots in order to achieve "dual-channel", but when I go to upgrade to some more RAM, does it have to also be 2x512Mb? So all 4 slots are "equal"? If that didn't make any sense, let me ask it this way..... Will my mobo recognize two additional sticks of paired RAM if they are larger? Like instead of 2x512, I get 2x1GB? Could a nearly double difference in RAM "size" confuse my mobo? Should I move the smaller guys to the black slots, letting the bigger guys nest in the blue slots? And out of curiosity, why would it make any difference. And let me also state that any opinions offered would be greatly appreciated, as I see there's other people in here with much bigger fish to fry. So....thank you to all! And here's a cool picture of a very happy lil' critter! For no real reason.