I just got a new GigaByte GA-8IHXP motherboard, and it came with 256mb of Muskin Brand pc1066 32ns RAM (2x128). My question is, can I go out and get some Kingston RAM or some Samsung RAM or any other brand of pc1066 32ns, or do I have to stick with Muskin RAM now? Also, hypothetically, say I went out and got 512MB of the same type of RAM (pc1066) and it was 2x256. Do the 2x256 pieces have to go in slots 1 and 2 and the 2x128 have to go in slots 3 and 4? Thanks!