K7T266 usb and fsb problem

[Babs]

Another problem with the MSI K7T266 mobo, which hasn't gotten alot of attention, is that usb functionality dies out when you raise the fsb. From what I've seen, most lose USB around an FSB of 138 or higher.

I believe it may be due to the very funky PCI IRQ mappings on this board.

I have the pro raid version of the board. Resistor on 127, no resistor on 126. With AGP Pro slot, no USB 2.0. Happens with all three different bios versions, but am currently using 10a. I know that my add-in cards can handle the higher FSB's, as can the processor and memory. I've gotten the board up to 150 FSB stable with no other anomilies but this USB problem.

If anyone has any experiences with this problem or even a solution, please feel free to post any info you might have here.

 

[KhakiBoy]

My board does the same thing, USB fails once I reach a FSB of 138-139. This is my first board I've tried overclocking with and initially thought it was just a side-effect of upping the FSB speed. I've gotten my system to run at 150MHz FSB but haven't really tested the stability. The system does pause now and then but starts responding again in a second or two. For now I'm content just running at 133FSB anyway, so it's no biggie to me. The other issues with the board are more important to me at this time. Another thing I've noticed is that I still get power to the PS/2 ports when the system is off. I have a MS Intellimouse Explorer and it continues to glow even when the system is off. With my old system it didn't do this. Anybody have an explination why?