i am looking for a new mb that will support a 3.4/478 & also support rambus ,PCIe would be a plus but not entirely necessary at this point.the thing is i have 6gig total in 2 comps so thats why im trying to stick with the rdram.PCIe is again optional.
As far as I know intel discintinued the support for rambus a couple of years ago. I don't think there are any new mobo which support that.
6GB of ram (which would also be a complete overkill for todays software) would only work in a 64bit environment. That was however introduced with 775. I dont't think there are any processors which are 64bit & 478