The Iwill XP333 does not need to be overclocked to use DDR333, it is designed for it. The setting is right in the BIOS. It has AGP/PCI dividers that go all the way to 1/6, so your PCI and AGP busses stay in spec while your CPU and Memory run at 166(333DDR). I have this board and I must say that I am extemely pleased with it. No IDE issues like the KT266a, and I am getting a 227MHz OC from my 1.33AYHJA Tbird. Not too awful bad for $109 shipped, wouldn't you say?
Jeff