On my 2 year old PC (Win8 - X99-A motherboard) I have suddenly encountered an odd audio issue. A short summary of the events: About 11 days ago, my speakers suddenly dipped in volume and then started emitting a white noise. If I turned the volume down, the white noise followed, and sometimes if I maxed out the volume I could barely hear the real audio behind the noise (which remained somewhat constant even on max volume). I tested my headset on the system, both for the front jack and the back, same noise and result. This occurred after I had uninstalled a duplicate windows help, and even though I couldn't see why that could be the reason I ran a system restore (made just before the uninstall). This did nothing, so I proceeded to update drivers for audio, which fixed it for a brief moment only for the sound to dip again and the white noise return as I started watching a video. As I tried the volume mixer and slightly adjusted the volume it suddenly went back to normal.. and then one minute later the white noise returned, with regular sound vanishing. So I updated all other drivers that might be related, turned off any digital signals, any graphic audio drivers that might cause an interference and en rerouted the cable to cross less power-lines (even if that shouldn't be an issue given the previous 2 years in the same spot). Result: Nothing. I then unplugged the speakers (headset was already disconnected), went for windows update and finished everything they wanted to update, and finished the updates while turning the computer off. The next day I plugged the speakers in, turned on the computer - went on youtube, found a video with sound and turned on my speakers - no problem. Everything worked, and continued to work for the next 10 days. So yesterday I turned on my computer as usual to work, and baam - the exact same issue happened; constant white noise and the audio going from off to very low (only audible at max volume), and sometimes it will briefly return to normal, before going back to white noise. I figured okay, I've done this before and maybe another windows update ****** something up, so I did many of the same steps as last time, ending with the computer being turned off with no speaker plugged in. Next day (today), I tried turning it on again, and the problem in all its white noise glory is still here. If I plug in a new audiodevice the noise will stop while the audio manager (realtek) asks what it should do with it (type of headset) and then will immediately resume once I've indicated what device I plugged in. The machine haven't been moved, everything in the system except for the audio works without a problem and windows audio troubleshooter is, of course, not finding any issues. I have not yet gone for a close inspection of the motherboard yet, as it is somewhat cumbersome to get it out, and I am hoping to get an indication from this forum as to what this sound like. My own and those answers for similar issues I found, with a software solution didn't help, so I am hoping someone on here has a good idea for what is wrong, or at least might point me in the right direction. I am hoping that it is not a hardware issue, but if it sounds like it to you, I will have to get the board out. Thanks a lot in advance for any advice.