I have this feature on my Asus A7V8X and it works OK, but the audio level is very low so make sure your speaker volume is turned up. I expected the system speaker would be used, not the soundcard. Anyway, after a few weeks it became irritating so I disabled it. Still if you have a feature on your system you want to know that it works. If your speaker system is OK and Post reporter is enabled in BIOS I can't think what the problem might be. I should mention that I'm using the mobo's built-in sound chip. If your mother board has built-in sound you could try that instead of your AGP card.