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PSU Crackling noise, help!

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  • Components
  • New Build
Last response: in Components
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July 26, 2014 11:59:49 PM

Just finished a new build using a CX 750M PSU. There is a very annoying and semi-loud electrical-sounding crackling noise coming from it. Any ideas as to what this could be?

More about : psu crackling noise

July 27, 2014 12:04:46 AM

This is one of the reasons a lot of people advise against getting a CX series PSU unfortunately :(  It could be coil whine. It definitely isn't normal though. I would highly suggest RMAing it before it does any damage to the rest of your PC. Is the noise constant or only when drawing a decent amount of power from it?
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July 27, 2014 12:10:08 AM

The CX series is not suitable for a gaming or enthusiast machine ...... caps can't handle the constant high loads, the voltage stability sometimes exceed the ATX spec
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July 27, 2014 12:11:08 AM

i7Baby said:
Get a new power supply - from tiers 1, 2a or 2b of http://www.tomshardware.com/answers/id-1804779/power-su...


Agreed. Try your luck with the place you got it from and see if they will put the price you payed for the CX PSU towards a better quality one if you return it. :) 
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July 27, 2014 12:25:41 AM

Could you guys recommend any of those power supplies for under $100?
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Best solution

July 27, 2014 12:30:33 AM

Where are you located? I can have a quick look for you if I know which country you live in :) 
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July 27, 2014 12:32:14 AM

$60 http://www.newegg.com/Product/Product.aspx?Item=N82E168...

EVGA SuperNova G2 gets 10.0 performance / 9.5 build Quality ratings from jonnyguru ...one above is the B2 which is not in the same league
$90 http://www.newegg.com/Product/Product.aspx?Item=N82E168...
http://www.jonnyguru.com/modules.php?name=NDReviews&op=...

Other choices in same level

Corsair HX $100
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Seasonic M12 $95
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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July 27, 2014 12:33:31 AM

Alex Kelly said:
Where are you located? I can have a quick look for you if I know which country you live in :) 


West coast USA
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July 27, 2014 12:33:44 AM

I highly recommend the EVGA Supernova G2 750W as well. I just ordered one for myself and it's arriving tomorrow :D 

Because you live in the US you can order it off any decent US website, Newegg is really good. :) 
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July 27, 2014 12:36:54 AM

Post your build so we know how many Watts you need.
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July 27, 2014 12:38:01 AM

i7Baby said:
Post your build so we know how many Watts you need.


i5-4690K
Gigabyte Z97
R9 290
8GB 1600mhz
120 GB SSD
1 TB HDD
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July 27, 2014 12:39:58 AM

Lenster said:
i7Baby said:
Post your build so we know how many Watts you need.


i5-4690K
Gigabyte Z97
R9 290
8GB 1600mhz
120 GB SSD
1 TB HDD


The G2 750 is perfect for you :)  it may be more watts than you need, but it leaves some headroom and since it won't be pushing the limits of the PSU it will stay nice and silent.
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July 27, 2014 12:41:58 AM

Alex Kelly said:
Lenster said:
i7Baby said:
Post your build so we know how many Watts you need.


i5-4690K
Gigabyte Z97
R9 290
8GB 1600mhz
120 GB SSD
1 TB HDD


The G2 750 is perfect for you :)  it may be more watts than you need, but it leaves some headroom and since it won't be pushing the limits of the PSU it will stay nice and silent.


Unfortunately it is a bit too expensive. I am looking to ideally spent around $90, as that is what I paid for my CX750, and is what I had budgeted. I don't really plan on running SLI ever, so should I just drop down to 650W and save some there?

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July 27, 2014 12:44:52 AM

http://www.guru3d.com/articles_pages/asus_radeon_r9_290...

Quote:

AMD R9-290 - On your average system the card requires you to have a 550~600 Watt power supply unit.
AMD R9-290 Crossfire - On your average system the cards require you to have a 800 Watt power supply unit at a minimum.

If you are going to overclock the GPU or processor, then we do recommend you purchase something with some more stamina.


If the board is CF capable, I'd get an 850 watter.... if sure you will never ever go there, a 650 watter is more than enuff

$95 XFX Core Edition
http://www.newegg.com/Product/Product.aspx?Item=N82E168...
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July 27, 2014 12:48:31 AM

I will probably go ahead and get the 650 or 750W XFX Core edition. Everyone concur?
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July 27, 2014 12:48:57 AM

Lenster said:
Alex Kelly said:
Lenster said:
i7Baby said:
Post your build so we know how many Watts you need.


i5-4690K
Gigabyte Z97
R9 290
8GB 1600mhz
120 GB SSD
1 TB HDD


The G2 750 is perfect for you :)  it may be more watts than you need, but it leaves some headroom and since it won't be pushing the limits of the PSU it will stay nice and silent.


Unfortunately it is a bit too expensive. I am looking to ideally spent around $90, as that is what I paid for my CX750, and is what I had budgeted. I don't really plan on running SLI ever, so should I just drop down to 650W and save some there?



Yes, you could go down to 650W and I'd recommend an XFX or Seasonic PSU for that wattage. It is good to spend a decent amount on the PSU though as obviously you don't want to buy another cheap PSU that will give you problems like the CX series already has. But yeah Seasonic and XFX both make good quality 650W power supplies :) 

Although it's slightly more expensive than what you wanted to pay, the G2 750W has the best ripple suppression and voltage regulation out right now so you definitely wouldn't regret it. If you are considering a 750W XFX you my as well go for the G2. ;) 
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July 27, 2014 12:59:03 AM

Lenster said:
I will probably go ahead and get the 650 or 750W XFX Core edition. Everyone concur?


650 for single card
850 if you want freedom to upgrade to CF in future for a 75% increase in performance at little cost

Both have way more than enough juice for serious overclocks. 750 has no real return for the additional expense

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July 27, 2014 1:05:59 AM

Also, does it matter than the crackling generally happens when the system is under load? For example while running prime95 or burntest, the whine becomes unbearable. Could that indicate that it is something other than the PSU? Or no?
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July 27, 2014 1:08:58 AM

Lenster said:
Also, does it matter than the crackling generally happens when the system is under load? For example while running prime95 or burntest, the whine becomes unbearable. Could that indicate that it is something other than the PSU? Or no?


Probably not. If you are sure the noise is coming from the PSU it sounds like you got a dodgy one and something on the inside of it is struggling to keep up with the demands of your PC. By the way, thank you for selecting one of my answers as the best, I've spent a while trying to help out and I appreciate it :)  Best of luck with your new PSU after you order it!
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