First, Thanks for the help.
On optimized defaults and failsafe defaults the MB identifies it as a 6400+, but still finds it at 2GHz. I have the k9n sli platinum, and the web page at least states that it supports the 6400+ with stepping F3 and wattage 125W. This matches the specs of the processor I have, 6400+ black edition. See: http://global.msi.com.tw/index.php?func ... o=351#menu
I have been able to use the bios overclocking features to get it up to 3.0 (15x multiplier), and this is acceptable for now. But it's still not right. If I try to take it to 3.2, it just doesn't do anything and runs at 2.0 GHz, even though the bios still says that it's using a 16x multiplier. I didn't plan on overclocking it, so 3.0 isn't that bad, I'd just like it to be right.