You can try adjusting some IRQ's in the BIOS by using the hotkey.
To use the hidden setting hotkey, on the MAIN page of the BIOS press" Control + F1" then the screen will flash.
Then look for a hidden PCI IRQ Setting, I know it used to have it's own page on older P35/P45 models, but not sure if it's even included on the new models or not.
Worth a look though, when I next reboot I'll see if I can find it on my UD7