Is that board supported for Windows 7? Have a look at the manufacturers website for your exact board and see if there are audio drivers for it to suit Win 7, if you're not using them - do so. Otherwise native Win 7 drivers may work OK - that's what I'm using with my DG45ID because the Intel supplied ones pose reliability issues.
You'll need to ensure any BIOS update you attempt to flash is precisely for your specific board so that'll mean checking the exact (full) board model number to make sure it's suited to the download. FWIW I doubt a BIOS upgrade is going to make a difference to the sound quality in this case, my guess is it's driver related.
Hi, thanks for the quick answer..
Yes, the motherboard supports win 7. The funny thing is that I have another exact system with the same MOBO running win 7 sweetly. I updated the BIOS for that system about a year ago and now Intel doesn't seem to support it anymore... I can't find the BIOS update. Should have keep it that time.
I found that the front jack sounds much better than the rear jack but does it at a very low volume....
Still looking for that BIOS...