4GHz Prescott causing USB problems??

[hixie]

Hey i have a 3GHz prescott overclocked to 4GHz.
The multiplyer is 15, which means im running an FSB of 267. However, when i increase the FSB to 270 i get USB problems, i have a USB mouse and that doesnt work now.
I have to lower the FSB to under 270, then reinstall the USB and mouse drivers to get the mouse working again.
Anyone know why this would happen or how to solve it??

System specs:
ASUS P4C800-E Deluxe
3GHz Prescott @4GHz
1GB Corsair PC-3200 RAM

[sluflyer06]

your PCI/AGP lock is breaking you can try increasing your AGP voltage or if you can set your PCI/AGP frequency a mhz or two higher that someitmes fixes it.

[hixie]

Tried both just now, neither worked.
I'll try to reinstall the USB drivers and mouse drivers.