Uh, I'm not trying to overclock on this board, but sometimes the BIOS seems to overclock on its own. Occasionally (after I'd moved it, or unplugged it and got the Lost CMOS effect) it would decide that my 1600 was an 1800, but it would never last past the next CMOS reset.
I'd forgotten about this till I installed my new 2200 tbred B last night - the K7S5A is convinced that its a 2400, even if I clear the BIOS. I'm not complaining, of course, especially since its running so damn cool with a Sk-7 and panaflo, but it has started me thinking that maybe I should try to overclock on this board after all...