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have been thru two PSU giving high pitched sounds CX750M

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  • Power Supplies
  • Corsair
  • Components
Last response: in Components
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December 4, 2013 7:49:38 AM

I have searched the forums and the interweb for an answer to my problem with no avail.
This is my first pc build and have been already thru 2 PSUs: Kingwin Power Force PF-850 that gave me a very loud, unbearable screeching noise after a few months of usage (I think because of a little water spill that I had on my desk, but I am not really sure). I changed the malfunctioning PSU for a Corsair CX750M that is also producing an anoying beeping/screeching noise. this noise is very well masked while gaming but becomes very annoying while I'm doing other tasks (studying, surfing the web, etc.) This sound is not that loud, but is still a bit of an annoyance. Is that normal or to be expected? Or may it be a sign of malfunction worthy of going thru the RMA process? Any suggestion is welcome.

System Specs:
cpu AMD FX-8320 OC to 4.2GHz cooled w a Corsair H60
gpu EVGA GTX 660
motherboard ASUS M5 A99FX
16GB RAM
HDD 750GB (with a SSD coming on the way)

More about : psu giving high pitched sounds cx750m

a b ) Power supply
December 4, 2013 7:58:26 AM

If I'm not mistaken, both PSUs aren't that high quality, so they may produce odd sounds.
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December 4, 2013 8:02:47 AM

enemy1g said:
If I'm not mistaken, both PSUs aren't that high quality, so they may produce odd sounds.


Should I eventually change the PSU? Other than the noise, what are the disadvantages of having a lower end PSU on my system?
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a c 94 ) Power supply
December 4, 2013 8:18:14 AM

I wonder if it's a coil wine. I'd try RMAing the Corsair.

Why are you buying 750-850W PSUs when your power draw is less then half that?
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December 4, 2013 8:38:46 AM

4745454b said:
I wonder if it's a coil wine. I'd try RMAing the Corsair.

Why are you buying 750-850W PSUs when your power draw is less then half that?


Rookie Mistake:
I wanted a PSU that would withstand future updates/builds, namely an additional gpu on SLI. But I have learned that it is better to buy a PSU with a proper wattage (in this case: less watts) in a higher end range.
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a c 311 ) Power supply
December 4, 2013 11:08:52 AM

sikitrake said:
4745454b said:
I wonder if it's a coil wine. I'd try RMAing the Corsair.

Why are you buying 750-850W PSUs when your power draw is less then half that?


Rookie Mistake:
I wanted a PSU that would withstand future updates/builds, namely an additional gpu on SLI. But I have learned that it is better to buy a PSU with a proper wattage (in this case: less watts) in a higher end range.


Hi - The PSU will pull only the power from the wall that your components require regardless of wattage. So, a larger capacity PSU will do no harm except for your wallet because higher up front cost. If your are reasonably sure you are going to SLI the 660 then go ahead n get a good quality 750.

You are correct that you are much better off (reggardless of total power) getting a better quality PSU, such as enthusiast or professional level, than the budget level or off brands.You get better internal components and a longer warranty as well.

BTW, coil whine can also occur in higher quality PSU's, just not as frequently as lower quality units.



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a c 94 ) Power supply
December 4, 2013 8:01:00 PM

Quote:
Hi - The PSU will pull only the power from the wall that your components require regardless of wattage. So, a larger capacity PSU will do no harm except for your wallet because higher up front cost.


Because it won't run with optimal efficiency it can also cause you to use more power then a better suited PSU. The plain 660 doesn't use a lot of power, a 550W PSU would run an SLI setup just fine. I was just wondering why he went that route, he gave an answer that makes sense.

He picked the answer, closing thread now.
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