I burned a ton of time on this a while ago but got nowhere. It would seem that Intel provides only partial documentation for their chipsets on their web site. I discovered that there are hidden/undocumented registers used in the DDR SDRAM setup (there are probably others). I also tried in vain to get a contact there but again came up empty handed. In the end, we ended up going with a different chipset manufacturer.
Ron, where did you get information for your 855 port in v2? Is it broken for the "hidden registers" reason?
-don