NO, it supports bus speeds of up to 250MHz in 1MHz increments. <A HREF="http://active-hardware.com/english/reviews/mainboard/bd7.htm" target="_new">http://active-hardware.com/english/reviews/mainboard/bd7.htm</A>
The only processor available at both "533" and "400" is the 2.4. The corresponding bus speeds are 133 and 100.
Also check out the first paraghraph at this page: <A HREF="http://www.pchardware.ro/Reviews/review.php?id=157&p=5" target="_new">http://www.pchardware.ro/Reviews/review.php?id=157&p=5</A>
YOu could set the PCI ratio at 1/4, making PCI 33MHz at a bus speed of 133MHz, or even lock it at 33MHz separately.
So you could go with a "Northwood B", or "533 bus" CPU on that board quite easily, giving you a performance gain.
What's the frequency, Kenneth?