Regarding cold bugs and drive strength resistors, there is a lot you guys do not know. I posted bios pics of the ati reference boards a while back and it showed 7 levels of dram drive. The reason for 7 levels is to accomodate from strong drive to weak drive with various levels inbetween.

Reason for this

As you chill the cpu the memory controller drive strength increases, so the colder it gets the more you over drive the memory. So you have to weaken the drive to the ram....weaker drive= higher fsb at colder temps.

Im working on a new article that will explain just what is happening wth the new breed of motherboard and why they clock ram so well etc.
Just adding juice to get a higher overclock really does not cut it any more, the science of overclocking got a whole lot more complex in the past 18 months and the results of these new motherboards is the huge ram clocks you are seeing now.

PS it helped AMD put the MCH on the cpu die also a little