PSU Crackling noise, help!

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Lenster

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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?
 
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Alex Kelly

Alex Kelly

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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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Alex Kelly

Alex Kelly

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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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Lenster

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Could you recommend one for under $100?

 
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JackNaylorPE

JackNaylorPE

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$60 http://www.newegg.com/Product/Product.aspx?Item=N82E16817438025

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=N82E16817438017
http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=380

Other choices in same level

Corsair HX $100
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139010

Seasonic M12 $95
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151107
 
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Alex Kelly

Alex Kelly

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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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Lenster

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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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JackNaylorPE

JackNaylorPE

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http://www.guru3d.com/articles_pages/asus_radeon_r9_290_directcuii_oc_review,9.html

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.
Click to expand...

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=N82E16817207011
 
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Alex Kelly

Alex Kelly

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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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JackNaylorPE

JackNaylorPE

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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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Lenster

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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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Alex Kelly

Alex Kelly

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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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