I have the IWill XP333-R (Ver 2.1) with
the latest BIOS (At least, it was the latest whenever I checked the web-site on Feb 2nd).

I *cannot* overclock worth a flip.
166MHz *does not work* even when I lower my multiplier to 9. Being as my CPU runs w/ a multiplier up to 12 w/ no problem (12x133MHz=~1600MHz, and 9x166MHz=~1500MHz) I know my CPU is not the limiting factor. My RAM also should not be the limiting factor since it is PC2700 (with active cooling to ensure it stays cool!). At 133MHz the board really uses 132.6, which is fine, I don't mind losing that. At 134MHz it is really 133.6, so that's ok too... I don't mind it being a little less than what it claims, but I can't even reach 150MHz.
I've not tried every step in between 134-150 because it really isn't worth it. I want to be able to run at 166MHz. I can't Even use the asynchronous setting of 133/166 (enabled in the new BIOS). What's up w/ that? Anyone else experiencing these problems? Any way to get around them?

Oh, BTW: I've read on OCWorkbench forums that using the jumper for FSB 100 means 100-132 and 133 means 133-233. Will, that isn't true because I can use 133 on both, but it doesn't matter because neither jumper allows me to push this board high...I can't even get it to POST at high/semi-high FSB speeds.