Hi

I got a new board to build a 'silent' PC.

It's a Intel BOXD525MW which has onboard Intel HD audio.

I've tried both 32 and 64 bit installs of Windows 7 and both give noisy/distorted audio.
This is apparent both via audio cable and headphones, both front panel and rear sockets on back of board.

Here is a video of the sound.

http://twitvid.com/MP3WZ

Has anyone come across this before? The board is brand new so wondering if it is faulty.

Thanks
Grant