they do have a plethora of divider options.
Currently, we took the NF2 Ultra-AL down and put the I875A back up since I am going on vacation for about a month, and my buddy wants the fastest rig in the house lol.
Right now its running this:
2.4C @ 3.01Ghz
250FSB 5:4 divider
7-3-3-2.5 A-Byte PC3200 (Samsung chips)
2.7v vdimm
+100mv cpu
1.6v AGP
I guess I should clarify that hte divider never worked for me for some RAM, mainly Kingston HyperX PC3500. This stuff would only run stable at 1:1 overclocked, and even then it would only do its rated speed of 217Mhz. At any divider, at any speeds, it would fail to either boot, or make it into windows. A very small number would get into windows and fail Prime95 on the first test.
not sure about the A1=B, basically its just a "B" revision, like the NF7-S has a rev2. The instant I get it, its going in my personal machine (the DFI NF2 LanParty which i love love love), and I will definitely tell you from my point of view whats better and what has changed =)
T