Thank you for all the input and effort here. I have a P5K-Premium mobo and get all components work after reading this thread. But the only matter remaining is that the volume of the Microphone is extremely low! I almost can't hear my voice in Skype or other apps even though I shout out laud. I am sure I select the right input device, for me it is "external mic", 'cause I can hear some noise if i blow into the mic. Has anyone solved this issue? Please help me out here, thanks a lot!