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TX750M Fan problem defective?


sidra

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Hello, I bought one of the TX750M power supplies and I think it's fan is defective.

 

So, this is a general Question thread to find out if my psu is running normally.

 

First:

The corsair fan is loud. Atm I have my system out of a case and after the initial boot the loudest fan is the PSU one.

(The only fans atm are the GPU, CPU and PSU)

=>As if the bearings on the fan are out of order or just don't have grease.

 

 

Second:

When I switch it off it makes a strange noise.

(Yes I checked and the fan doesn't hit any wires or anything like that.)

=>The best I can describe it is as if an old car engine just ran out of fuel O.o

 

Third:

I tested the following:

-PSU unplugged from system (ie no motherboard, no GPU, no HDD's nothing hooked up to it)

-Short out the green and black pins on the molex to switch it on.

(That makes it switch on and I am sure that there is zero load on the PSU, because there is nothing plugged to it.)

=> The result is that the fan keeps on spinning constantly.

 

Is that normal ?

Isn't the fan supposed to switch off if there is no/low load on the PSU ??

So would you say that I should ask for replacement from the retailer ?

And say that the fan/fan controller is defective ?

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The fan on this PSU is load and temp controller but with little of no load the fan will or should run at about 50-60% of its max speed and as the load reaches at or near 100% the fan speed will reach the highest speed. Or about 36 Db of noise.

attachment.php?attachmentid=10353&stc=1&d=1331225776

TX750MNoise.png.a82c130315ac9a042deaaf8b58707a26.png

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The fan on this PSU is load and temp controller but with little of no load the fan will or should run at about 50-60% of its max speed and as the load reaches at or near 100% the fan speed will reach the highest speed. Or about 36 Db of noise.

attachment.php?attachmentid=10353&stc=1&d=1331225776

 

So what you are saying is that the fan isn't supposed to switch off, just run at lower speed.

 

Ok I somehow overlooked that.

 

 

But is it normal to be louder than the rest of the system ?

I am pretty sure that I am not stressing it or putting a lot of load on it.

 

My system is i5 2500k running at stock and gtx570 running at stock.

And the loudness comparison is done while in BIOS.

(I am still installing my OS).

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They are fairly loud so if you have quiet fans in the system it is not uncommon for the PSU fan to be louder than other fans. Or if you have the case open it will seem much louder than it may really be. I would go ahead and get the O.S. installed and see if if it settles down.
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Installed os. And now running inside Fractal Design Arc midi.

 

No change... At idle the cpu clocks down to 1.6GHz and the Gpu clocks down to 50MHz.

Average temperature of cpu is around 30-35 C, and the GPU 31-35 C.

(all for light activities such as: idle /browsing internet ...etc)

 

That should in principle put less load on the PSU right ? And then the fan should spin down. But it doesn't...

 

So I decided to check if PSU fan spins up under greater load and ran Unigine-heaven.

It didn't :eek:

 

The only conclusion is that the power supply fan is running on max non stop for some reason.

 

Now that system according to http://extreme.outervision.com/PSUEngine

should consume around 475W, which is about 60% of the 750W...

But when idle it should be consuming far less.

 

I bought the PSU 6-7 days ago as well as the rest of the components.

I can't say that I am pleased by the noise :sigh!:

 

:confused:Could it be that the fan controller inside the Power supply is defective ?

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Installed os. And now running inside Fractal Design Arc midi.

 

No change... At idle the cpu clocks down to 1.6GHz and the Gpu clocks down to 50MHz.

Average temperature of cpu is around 30-35 C, and the GPU 31-35 C.

(all for light activities such as: idle /browsing internet ...etc)

 

That should in principle put less load on the PSU right ? And then the fan should spin down. But it doesn't...

 

So I decided to check if PSU fan spins up under greater load and ran Unigine-heaven.

It didn't :eek:

 

The only conclusion is that the power supply fan is running on max non stop for some reason.

 

Now that system according to http://extreme.outervision.com/PSUEngine

should consume around 475W, which is about 60% of the 750W...

But when idle it should be consuming far less.

 

I bought the PSU 6-7 days ago as well as the rest of the components.

I can't say that I am pleased by the noise :sigh!:

 

:confused:Could it be that the fan controller inside the Power supply is defective ?

 

Correction:

The fan controller works. I guess 20db sound really loud in a quiet room with a quiet system Lol

 

Any tips on quieting it down though ?

Would any additional sound dampening of the case make a noticeable difference ?

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