I recently got this board after switching from an AMD CPU to Intel and have a Speedlink Spes Clip-On Microphone.
On my old board the microphone volume was fine, I could have it at 100% volume with +20dB microphone boost and my voice would be crystal clear without any static. Now I've switched to this board my mic is incredibly quiet with both the volume and microphone boost maxed, as well as the volume in Skype.
I've tried the driver from ASRock and I've tried the latest Realtek HD Audio Manager but neither made any difference.
Another problem I've had is that without Realtek 3D SoundBack, speaker fill does not work properly and the sound coming from the rear speakers sounds extremely low quality and if listening to music vocals cannot be heard.
I don't think the board is the problem as everything else seems to be fine, I'm considering just buying a soundcard at the moment as I can't solve it for the life of me and I also have a pair of HD 598s which would benefit from a headphone amp.