There is some confusion about the memory speeds of AM2 cpu's with ddr2. The basic method is the divider is divide the multi by 2, and increase to the next whole # if a fraction.
The divider for a 12 multi is 6, and the same for an 11 multi (5.5=6) This means that odd multies cannot run ddr2 800 at stock speeds
Here is a pretty complete list of memory speeds with HTT sttings with various dividers.
Stolen from http://www.xtremesystems.org/forums/...d.php?t=105798
This should make it easy to figure your memory speed with various overclocks.
Low multies appear to be a bit wacky.