PSU buzzing changes as more appliances and lights turned on in house

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lorkyboom

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Oct 22, 2013
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10,510
Hi

i recently bought a Silverstone Strider Plus 850W ST85F-P,about 6 weeks ago and the PSU buzzes constantly. The PSU is connected to a surge protector and connecting to the outlet only does not change thing. here is starts getting weird. the PSU buzzes when then pc is turned off. its LOUD i can hear it from 5 metres away. Even weirder part the more lights and appliances in the house turned on the PSU buzzes more. any ideas?

thanks!
 
Solution
InvalidError

Whether or not line voltage might affect the PSU depends on how severe those fluctuations are. At my previous apartment, I had some extreme voltage fluctuations from 110V to 130V and that did kill two of my old CRTs.

Ideally, you should test with a multimeter before calling an electrician just to make sure you actually do have a problem. If the line voltage change is less than ~5V AC from normal within the 110-125V range, it probably is...
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InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
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Even if your PC is off, the 5VSB supply is still on so that's likely what is buzzing. If that buzz's pitch changes depending on what other appliances are turned on in your house then I would guess your house has somewhat high impedance power feed or bad neutral that causes voltage at your PC's outlet to change.
 
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lorkyboom

Honorable
Oct 22, 2013
3
0
10,510


Thanks for getting back, does that mean until an electrician comes out not to use pc and does that affect the health and performance of PSU

Only reason why I asked is I got a brand new HD gigabyte 7990 and it's running at 65C under a moderate load just seems a bit to hot for brand new with paste
 
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InvalidError

InvalidError

Titan
Moderator
May 18, 2007
23,815
5,265
108,890

Whether or not line voltage might affect the PSU depends on how severe those fluctuations are. At my previous apartment, I had some extreme voltage fluctuations from 110V to 130V and that did kill two of my old CRTs.

Ideally, you should test with a multimeter before calling an electrician just to make sure you actually do have a problem. If the line voltage change is less than ~5V AC from normal within the 110-125V range, it probably is within the utility provider's tolerances.
 
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