I have an M7NCD Pro motherboard which gives me the option of having a maximum of either 2Gb of Dual Channel memory or 3Gb of Single Channel memory. (At least I think that's how it works. I'm not sure if 3 1Gb Dual Channel chips will work or not.) Which of the two is the better option? I'm also having trouble finding out if my motherboard supports ecc and registered memory or not. I've checked the manual and their website, but they don't say anything about it. Can someone please help me out with this?