I hit it at 200 FSB stock, no over clock, stock speed, stock multiplier. It used to read 200 flat, it slipped to 200.93 and the 6400 processor that's supposed to run at 3.2 was reading 3.214. At higher FSB it would read correctly, then slip a little, then go back to the correct FSB speed. I figured it was a voltage regulation problem, ordered the M3A we talked about in the other section, then it died. Temps on the board were good, no over heating chip set. Diagnostic card said "OEM memory on board", code c2, even with no video card or ram installed, said same thing with it installed. Might indicate a Eprom, or Rom failure.
Asus was really good about it, just want bare board, didn't ask for an invoice (I have one), didn't try to shuffle me to the reseller. 3 year repair replacement at a RMA center in Indiana. Average 10 business day turn around (plus Christmas, plus new years day), this is literally the worst time of year for RMA. Holiday shipping, holiday days off etc.
I installed the same Mobo for a neighbor, his is still 200 fsb flat no slippage. It could be some thing else that killed it. It's had 3 processors, been in 3 different cases, 2 different power supplies, 2 sets of memory, hard life. That and it died days after the power outage from the ice storm. Shouldn't be an issue it wasn't on when the power went, and it's plugged into a UPC un-interruptible power supply. Even with a corsair power supply it read fluctuation's on vcore, vdimm etc, not large fluxes, but not normal. I know you have the same board, but I wouldn't let it worry me too much, it probably committed ritual suicide when it realized I was going to sell it to an old lady to internet with.