I just got a SH6 too. Right now I am running a P3-700 at 966, not 100% sure if it is 100% stable:P I was able to get it to go at 1006 but it crashed in less than 30 minutes of 3DMark. So far, just the usual tweaks in the BIOS, upping the voltage to 1.85 etc. I couldn't get my Muskin Rev 2 ram to run at 2-2-2 5/7 so it is running now at 2-2-2 7/9.
I got a question for u. When u turn on the system, do u hear 1 or 2 beeps? I hear 2 for mine which is weird cos so far all my mobos only beep once. I am worried that the extra beep is to tell me that something is amiss. I hear the first beep b4 the screen where they test the ram and another beep right after that the the screen will show the IRQs of the cards and stuff.