I've searched google and this forum and can't find a definite answer: MP: 3GHz Quad Core Xeon. I'm trying to figure out if there is a big (noticable) difference in speed between upgrading RAM with less of a bigger size (2x2GB) or more of a smaller size (4x1GB). I realize that both the 2GB and 1GB chips are still 667 MHz, so my instinct tells me the 4x1GB setup will be able to handle a larger load (since it has 4 chips at 667 vs. 2 at 667). Does anyone know with greater certainty? Also, with the quad core processors, is there a benefit to having 4 separate chips?