Non-standard pinout on Gigabyte GA-P55A-UD4 front panel audio HDA-port

[Torgrim]

Hi,

I've noticed that several of Gigabyte motherboards, among others the GA-P55A-UD4 and GA-P55-UD6, have pinout mismatches compared to Intel's guidelines for HDA.

According to the manual of the GA-P55A-UD4, the board's HDA pinouts are:

1 MIC2_L
2 GND
3 MIC2_R
4 -ACZ_DET
5 LINE2_R
6 GND
7 FAUDIO_JD
8 No Pin
9 LINE2_L
10 GND

But according to Intel's reference design, it should be:

1 PORT 1L
2 GND
3 PORT 1R
4 PRESENCE#
5 PORT 2R
6 SENSE1_RETURN
7 SENSE_SEND
8 KEY Connector Key
9 PORT 2L
10 SENSE2_RETURN

For some reason pin 6 and 10 are grounded by Gigabyte, when the mentioned pin's should in fact be representing jack detection return for port 1 (mic) and 2 (headphones).

Can anyone give some input on why this is?

Thanks in advance!

 

[ekoostik]

That's an interesting question. I noticed the same thing when comparing the plugs available on my case to the manual provided with the GA-P55M-UD2. Although I never actually checked the mother board specs or the case specs with Intel's reference design to see which was correct. (The case specs match the specs you've listed.) I guess I just assumed one of the specs was wrong. So I'm not really any help here. But I'll be interested to see if anyone else knows anything about this.

 

[Fatbird]

Can't see any difference between Sense_return and GND. Aren't they meaning the same thing? Any body got problem using the HDA front panel?

This board is WHQL certified, I don't believe that a non-standard board can pass this test.