I have both the C566 and the GOrb cooler.
I had the Abit BE-6 II in service until the floppy controller died and killed all furture floppies I plugged into it. I clocked it to 100mhz bus @ 1.65 = 850.
Then I bought the Cusl2-C to put in service while the Abit was out for its 2-4 week warrenty "repair". All other components are the same, memory, video, case, sound, etc.... I can't get w98 or w2k to work at 100. I'm frustrated with this. But still, I've never had an Asus die on my yet....