PSU coil whine when another heavey electronic is used

[usmansajidrocks]

So my house has two electricity meters and we pay two bills.

However both connections give me different type of coil whine.

I have Core i5 2400
GTX 750 TI FURTHER OVERCLCOKED
8GB DDR3 3STICKS
1 HDD
2 FANS

I think power usage is below 300w but i am using Delta GPS 450-AA 100. 440w max output.

So first i used my pc on connection 1 with a small lcd monitor. The coil whine had a lower frequency and could only heard if u keep ur ear next to the psu. The whine had pattern. It got louder and then quiter. After a half second break it would come back for a second.

Then i moved my pc to my room and connected it to 32 inch led sony. It gave me a constant coil whine but again it very low frequency. Could only be heard when very near to the psu.

After doing few tests. I tried voltage stabilizer which prevented coil whine for a minute or two.

Then i called electrician who could not even hear it due to low frequency or his weak ears. My brother can also listen to it so i am not the only one.

I took it the shop and no coil whine there.

The last thing i tries was i shutoff the UPS which backed up few fans and lights in our house. It was a heavey ups and shutting it down helped the coil whine go forever but only in connection 1. Now that my pc is in my room shutting off ups does not help. As in this connection other heavey appliances are. Connected.

I also heard same whine from my big printer, the UPS itself,and myy sound system.

I want to ask do i need to worry about this?

And do power outages damage pc? If so ,how? There are daily 4-5 power outages in my country and my pc is turned off suddenly but then a orange light blinks after power is gone. So far my pc is good even though it is turned off by power outages daily for multiple times for past 6months

 

[badboyrog2]

Delta GPS 450-AA ... first if you have a garbage can aside you , it will be good to use it..

get a real psu like xfx/seasonic/antec hcg/evga / corsair

 

[usmansajidrocks]

If i am not mistaken Delta is a good company which makes quality units. That is why i bought it.

 

[badboyrog2]

Current strength
Current for the +3.3 V: 30 A;
Current on The +5 V: 28 A;
The current on the +12V line 1: 14 A;
The current on the +12V line 2: 15 A;
Current line -12: 0.5 A;
Current on The +5 V Standby: 2 A;

low amp rails

 

[usmansajidrocks]

Its not low. My gpu remoends only 20a and 400w. Bcz they are being safe.

 

[usmansajidrocks]

The PSU mentioned Corsair, Xfx, evga, and antec dont make their own power supply but they buy from other companies.

Delta however makes its own power supply and antec uses psu made by Delta.

My previos power suppy was only 240w with 15a without gpu. When i added gpu i bought 450w psu as my gpu only uses 60w.

 

[usmansajidrocks]

I just need to know wether the sound is dangerous. I can only hear while keeping ear next to the psu

 

[badboyrog2]

i never said delta electronic not good..i talk about the one you have.
you need more amp on the 12 v rail to meet the todays standard

 

[usmansajidrocks]

Well 28amps are morethan enough my system requirements is only 300w. I thought i didnt tell u but i ran my system on 240w 15a for few daya when my new was coming.

 

[usmansajidrocks]

Not heavry gaming i did on 240w.

 

[badboyrog2]

maybe this coil whine come from the gpu itself...
is related to vsync and FPS , when you playing did you hear that whine?

anyway this coil whine is not an issue , its just a combination of hardwares who are connected togeter and do coil whine

 

[usmansajidrocks]

It is the psu even when there is no gpu. Surprisingly aftar many days now there is no coil whine.
It might come back.

Anyways i believe it to be electrical issue as when i shutoff the UPS which backs many lights and fans. Coil whine goes.

 

[usmansajidrocks]

And forgot to mention psu also gives coil whine when pc is off but psu is getting power. Its better to hear at that time as fans are also off

 

[badboyrog2]

do you have a surge bar?
if not ...buy one

 

[usmansajidrocks]

What is surge bar?. I have a fused cable and switch

 

[badboyrog2]

A power surge, or transient voltage, is an increase in voltage significantly above the designated level in a flow of electricity. In normal household and office wiring in the United States, the standard voltage is 120 volts. If the voltage rises above 120 volts, there is a problem, and a surge protector helps to prevent that problem from destroying your computer.

http://i.kinja-img.com/gawker-media/image/upload/s--fcDIMmgW--/c_fit,fl_progressive,q_80,w_636/192wxby9k6o3ejpg.jpg

 

[usmansajidrocks]

Hmm. Then i might need it. But in our country voltage does not increase from designated level it however decreases . Heheh

 

[westom]

Hmm. Then i might need it.

For that power bar to do anything, your 230 VAC must increase to well over 500 volts. How often is your voltage increasing that much. His APC power strip ignores any voltage at or below 330 volts. Why did he ignore the numbers in its box? Because most electrical recommendations come from myths in advertising. He has no idea what your coil whine is. But he has been ordered by advertising to always recommend those ineffective devices.

Coil whine is often due to harmonics. Other frequencies at tiny voltage that cause some part (not fully sealed) to vibrate. It does not harm anything for the same reason blackouts also so not harm hardware. It is only irritating. An electrician is not trained about the characteristics invovled in that characteristic of electricity. He can only say if wires are connected as he was trained to connect them.

One source of those otherwise problematic electrical characteristics is a UPS. These tend to make electricity 'dirtier' when in battery backup mode.

Some other electtronics devices can might be the source of that tiny (maybe 1 volt) noise at that frequency. To say more requires experimenting. Or electronic test equipment that you (nor he) has and would not know how to operate.

Noise can be eliminated by replacing the part generating that noise. Or just ignore it.

 

[usmansajidrocks]

Well the sound is not annoying as i cant hear it unless i open the case and keep my ears close to it. This sound was new so i was worried about the hardware.
I once tried voltage stabilizer 1200(something) and it didnt eleminate it.

So this whine would also come from other appliances.

For some reason there is no whine anymore.

 

[usmansajidrocks]

Well i guess u answered it. I should not be worried as gamed 500+ hours on this power supply. Not even a single problem.

 

[usmansajidrocks]

And lol my electricity in my country can never exceed 300v