Case cable "Mic Bias" = Mobo "+5v" ?

[Kaifu]

I did some searching but there's no straight answer to the question. The motherboard manual (page 25) lists "NC" for pin 3 and "+5V" for pin 4. I just need to know which one to plug the MicBias cable that's running from the front panel of my case into so that I don't fry the board.

I think that I should plug it into the +5v, or pin 4. Am I correct? My concern comes from S0Y73NTGR33N's comment in this thread:

"Mixing up mic-bias and mic power or something like that on my ASUS k8vse-dlx. Hello smoke... goodbye motherboard."

edited to fix formatting

 

[funks]

Have the same board as you.

When I plugged my Front Case Mic onto Pin 1, and Pin 4 (the 5v), it wasn't working..

Plugged it into Pin 3 (NC - aka MIC BIAS) - front panel mic connector started working (and mic actually worked).

To re-iterate - for front panel audio mic, hook up the MIC cable to PIN 1(MIC IN), and PIN 3(NC - which is MIC BIAS).

If you hooked it up to PIN 1 (MIC IN) and PIN 4 (5v DC), it won't really damage your board (and make it smoke) or anything as the MIC BIAS pin outputs 2.9v -> 5v dc. (Your mic just won't work).

Don't know how that guy got his ASUS mobo to smoke, maybe shorted the board or something (by hooking up the 5vdc (pin 4) and ground (pin2) together ?).

 

[Kaifu]

Thank you, funks.

One last question since you have the same board. Am I reading the manual correctly or will using the front panel audio connectors disable the onboard audio connectors up by the 4 USB ports/gigabit ethernet? If that's the case, I'll probably forego the whole front panel audio thing altogether in lieu of using the rear ports.

 

[funks]

How does your mobo front panel connection pins look like?

On my centurion 5, the left and right audio cables are just single cables w/ a small pigtail for the other pin..

eq.

FP Left Audio Speaker wire -> Pin 5 -> Short Wire (pigtail) -> Pin 6
FP Right Audio Speaker wire -> Pin 8 > Short Wire (pigtail) - > Pin 9

Basically, it's just a TAP..

Both front panel audio, and rear panel audio works simultaneously on mine.