I am getting a new computer and have everything figured out except for the mobo and memory. I don't understand exactly what the following are, and how they work: 1) Dual Channel Memory. If I have 512mb on one channel, and 512mb on the other, do I now have dual 512, where it acts like a RAID 0 array for hard drives, or do I have 1GB of RAM and it still SORT OF acts like a RAID 0 array? 2) What are the northbridge and southbridge on motherboards? Could you explain this in detail? 3) What does the front side bus and back side bus do? (I know most mobo's don't have a back side bus, but would still like to know what it is) 4) The front side bus, people say an 800mhz isn't really 800mhz, its 200 x 4 or 400 x 2. What does all this mean? 5) AMD's hypertransport technolgy. Its not really a Front Side Bus, so what is it? And why do they advertise it as 1.6GHZ but its only 800mhz FSB? All this is very confusing! 6) Intel's EMT64, is the processor 64 bit or does it just emulate 64 bit instructions? If anyone could explain this that would be great, or reply with links that explain this stuff. Sorry for all the questions in one post, I am obviously very confused!