Hi all. Does anyone know where to get the audio drivers for the following sound card:

c-media Envy24HT pci

everything installed ok except audio

system specs.
MB: Asus m2n-e sli
Processor: Athlon x2 6000+
memory: 4gb ddr2
video: nVidia 8000 GTX

onboard audio works but when enabled i get a message ''usb bandwidth exceeded'' if i connect web cam hence the pci sound card..