<< Does anyone know when the 133s (533Mhz) are coming out?
And, will they need new mobos or can I use a Xeon133 in an existing 850?
Thanks! >>
3-4 months for 133MHz FSB P4's most likely, with the Xeon variants appearing shortly thereafter. Intel's roadmap doesnt specify so I can't be exact, but it is known that Intel plans to quickly transition to a 133MHz FSB.... and rumours but it shortly before mid-year.
The Xeon isnt compatible with the I850 chipset so that's out right there, you'll need an I860 based motherboard with Socket603 to support the Xeon. None of the 4 currently available I860 boards will support the future 133MHz FSB Xeon's.