If the graphics card is somehow causing this problem, there are one or two things you could do to verify that. (Though running a HD video at postage stamp resolution doesn't seem to get rid of the noise for me.) I was told by someone else with a similar problem that interference and noise is a common issue on the nVidia 8xxx line - a common complaint which nVidia refuse to acknowledge is a problem.Īpparently it happens when the graphics card is outputting an extremely high number of frames per second - which it shouldn't be doing in games since I have vsynch set to Force On, yet I still hear some noise when a game is running. In any case, I have a fair idea as to what the problem is now: the my nVidia 8800GT. I'm loathe to try swapping the PSU out since that would involve taking the computer almost completely apart, and I generally have bad luck with things going wrong if I take a computer apart that much. It's still there, but not quite as noticeable. I was able to reduce the noise by moving the headphones to one of the other output jacks on the sound card. If the problem wandered along with the power supply, then the power supply obviously is the "bad guy" in this case.Īnd once you have done all these experiments, you should be able to see which part of the machine causes the trouble. If the problem is still with the same computer, then it's likely something from the mainboard (the posting found in another forum already hints at this). If the sound is OK with the second computer, you can swap the power supplies and check whether any one of the computers has problems with the sound now. (It should be, but I can be very suspicious if it comes to hardware problems.) If you have another computer at hand, install the C-media sound card into it and check whether the sound is OK then. I would suspect either the power supply or some voltage regulators on the mainboard, or maybe some weird interaction between this specific mainboard and this specific power supply. And since the problem occurs even with a separate sound card, I think it may be some kind of (electric) noise introduced into the +5 V lines in the computer, thus reaching every PCI device. Feedback loops of that kind often result in some kind of buzzing noise. These feedback loops can occur if a computer has more than one connection to electric ground - which it usually has: The audio lines have one ground connector, and the power line to the wall socket has another. By doing that, many feedback loops can be avoided. ![]() I tried disconnecting every cable from the PC apart from the power and the keyboard - still no change.Connecting the computer to an UPS (with the UPS' power plug pulled out of the wall socket) is a good idea in this case. I tried unplugging everything else in the room, including the computer itself (letting it run off the UPS) - no change. I found this thread on some random forum where the original poster seems to be describing the exact same problem, but of course there's no solution there.Īny thoughts? I can't bear to watch films on my headphones like this any more, it's driving me mad. I also found suggestions to disable or disconnect the PC speaker, but that didn't make any difference either. I've just tried installing the latest drivers, both downloaded from Gigabyte and directly from Realtek, but they don't do any good. ![]() I can't think of anything relevant that I've changed since getting the headphones. I've only had the headphones for a relatively short time, but I've only started to notice this even more recently. It's also much harder to hear when the noise reduction and amplifier on my headphones are turned off, but again it's still there. I can only barely hear the sound on my speakers if I turn the volume all the way up, but it's still there. The noise is louder when the sound card jack is set to "headphones", but I still get interference to a lesser extent when it's set to "line out". It also happens even when the sound itself is muted. It's mostly noticeable when there's not much happening sound-wise, e.g. I can also hear some interference when I minimise and maximise things in Windows. The buzzing only seems to happen when doing certain things, possibly when there's a heavy hard disk and CPU load - I can hear it when watching HD videos from the hard disk and while playing certain games. I'm using the built-in Realtek HD audio on my Gigabyte P35C-DS3R board, and my headphones are a pair of Audio-Technica ATH-ANC7s. Lately, I've been hearing an annoying buzzing noise when using my headphones.
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