I'm typing this on a system running a CUBX with a P3 700e running at 933mhz, FSB = 133mhz. The only problem with running this board at 133mhz FSB is that the AGP bus has to run at 89mhz instead of the proper 66mhz standard. The PCI bus runs at a proper 33mhz at 133mhz FSB due to the 1/4 divider. I have ran both a Radeon and Geforce video card and have had no problems at all. Just make sure your video card is OK with the high bus speed and you should not have any problems.