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Power Supply Makes Buzzing Sound when UPS kicks in.
https://mysterybyte.com/phpBB3/viewtopic.php?f=21&t=723
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Author:  lobstaMan [ Tue May 06, 2008 7:31 pm ]
Post subject:  Power Supply Makes Buzzing Sound when UPS kicks in.

Everytime my UPS kicks in and runs on battery my Enermax power supply makes a loud buzzing noise. At first i thought it was the UPS so i returned it and got another one but the noise is still there. Could it be a bad power supply?

Author:  Dr_BenD_over [ Tue May 06, 2008 8:04 pm ]
Post subject: 

I get a buzzing, but it is the UPS :shock:

Author:  lobstaMan [ Tue May 06, 2008 8:09 pm ]
Post subject: 

Dr_BenD_over wrote:
I get a buzzing, but it is the UPS :shock:


My ups buzzes alittle but the power supply is much louder.

Author:  lobstaMan [ Tue May 06, 2008 9:06 pm ]
Post subject: 

Well it seems I need a UPS with true sine wave output instead of a simulated sine wave ouput because the Enermax PSU has active PFC. :roll: FFS I've had some problems with power supplies since I got my latest rig. 2 coolermasters and this enermax .. although the enermax is a great power supply .. I can't be buying a true sine UPS cuz they are expensive. So looks like I gotta try to sell my enermax and get a different model. GREAT.

Author:  sbeeze316 [ Tue May 06, 2008 9:52 pm ]
Post subject: 

that blows goats, gotta be very careful what PSU you buy when your using ups backups.

Author:  Flama22 [ Wed May 07, 2008 9:30 am ]
Post subject: 

I never even knew about this issue so I guess I've been lucky with PSU/UPS's. :?

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