To clear up the issue on dual channel modes and what not. The motherboard and the configuration the ram is inserted into the individual slots is what decides what mode the ram runs in. Lets look at older motherboards... you could use 2 kinds of any size sticks, even if it were a 2 gig dual channel kit, they would only run in single channel if the motherboard is only capable of single channel. Dual channel, which is what i'm most familiar with is decided by the color slots on the board. Some are different, some configurations require that the same color be used or others use different colors. The only thing is that both the sticks have to be the same size, like 1 gig, 2 gig, etc. Quad channel, I'm sure is similar to dual core, I am just not familiar with it, and I'm pretty sure it is on the newest higher end boards... hence I don't know them very well, because I haven't built a machine with he budget required for it.