Phenom and OHCI will be unloaded across sleep

I've tried several installation of OSX but i've always the same
error when the computer boots: OHCI will be unloaded across sleep

Currently, I've iPc 10.5.6 and it works but when it wakes up, i have
"USB over current notice" error.

USB ports on front causes freeze when i connects an iphone, otherwise,
when i connects an USB Stick it works. USB port on back of computer
work when i connects my iphone.

I've an Phenom 9550 x4
with 780G chipset and SB700.

First, Is the SB700 kext necessary to don't have OHCI error ?

Next, what is the better distrib for phenom and 780G ?

Thanks for your replies and sorry for my english.
Manolo.Inc