Just read this over at anandtech. It is about the NF4 Ultra and SLI chipsets being the same thing, except the Ultra chipset has a set of resistors not connected. Connect the resistors and bam! you have an $40-$50 cheaper than normal SLI mobo. However, there is also 3-5% less performance than a "true" SLI board. This was done on a DFI board.
Figured I would throw it out if no one has read it yet.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2322
Figured I would throw it out if no one has read it yet.
http://www.anandtech.com/cpuchipsets/showdoc.aspx?i=2322