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My PSU fan doesn't spin

Last response: in Systems
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August 4, 2012 7:19:05 PM

Just today I started my new build for the first time.
Last time I check, the PSU fan didn't spin at all when computer was running.
I thpight that since there isn't any load to the system it didn't spin, or maybe it only spins on certain temps.

The PSU is Corsair 850AX gold.

Should the fan spin all the time?
Is there a way to fix this?
And is there a simple way to check if the fan is spining, like a software or somewhere in windows, so I won't have to mess with the case, lift it etc..

More about : psu fan spin

August 4, 2012 8:18:00 PM

According to specs it's a variable speed fan. Leave the system run or do a SiSoftware Sandra test to see if the fan will come on. Touching the area around the power supply if it gets too hot without the fan running you might have a defective fan. Keep an eye on the other temps as well. Keep the case in a position where you can see whether the fan is running as you won't be able to tell otherwise.
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August 4, 2012 8:18:28 PM

hey dude. the fan isnt supposed to spin until you are throwing more than 20% load on the unit
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August 4, 2012 8:19:31 PM

put a nice load on the unit and see if it spins
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August 4, 2012 8:39:28 PM

I tThank you. I tried Batman AC benchmark for a long time and it didn't turn on.

Also my Asus 670 GTX DC2T is getting somewhat hot - near and over 70 C at that benchmark.
CPU temps are ok I think, below 50
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August 4, 2012 8:45:15 PM

Is it detected in PC wizard 2012?

Graphics cards always get hot in games, especially with stock coolers.
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August 4, 2012 8:47:16 PM

But is the temp reasonable? and the bottom of the PSU feels cold.

Dont know this prog. what di u mean detected?
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August 4, 2012 8:50:30 PM

If a fan is detected then a program will show speeds.

Do you know how much load is on the GPU- check with this- http://www.gputemp.com/
If it doesn't break 85c then its okay...

If there are vents on the PSU, can you feel some heat?
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August 4, 2012 8:59:59 PM

I m inside Sandra 2012 there is both benchmark and hardware info what should I look for?
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August 4, 2012 9:09:23 PM

Temps and fan speeds if possible, if not download PC wizard 2012, that should give you most of that info..
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August 4, 2012 9:17:19 PM

I am running this Sandra2012 overall bench.
It really messes up my system in terms of my windows is terribly luggy and freezes every action.
But all checks so far came positive.
even under 100 load each core according to Core TEMP - core 1 reaches 45 temp, others stay at 33-35

PSU FAN DOES NOT SPINS. Not at all. But it doesn't emit heat or anything. It is rather chilly.. but this is strange.
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August 4, 2012 9:19:22 PM

Maybe there isn't a big enough load on it, it is 850w, it takes alot to overload a 850W PSU, do you mind posting your comp specs?
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August 4, 2012 9:29:14 PM

1) GPU: Asus Nvidia Geforce 670GTX DC2T

2) CPU: Intel Core i5 3570k
3) Motherboard: Asus Sabertooth Z77

4) Case: Corsair CC600TWM-WHT Graphite Special Edition

5) PSU: Corsair CMPSU-750AXEU Gold AX750 Modular

6) RAM: 2X8GB G.Skill Ripjaw-X DDR3 1600Mhz

7) CPU cooler: Noctua NH-D14

8)SSD: Crucial Solid Series 256GB CT256M4SSD2 SSD
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August 4, 2012 9:32:09 PM

Apparently on 100% load, you are meant to draw around 350-400w...
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August 4, 2012 9:32:11 PM

WHAT THE HELL!
I launched the PC Wizard you sent me.
There was red flickerying on screen and then BAM, the entire screen went super bright RED!
all red for about a minute. and then I reached program menu and back to this page.
what the hell???
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August 4, 2012 9:34:44 PM

Ransome said:
WHAT THE HELL!
I launched the PC Wizard you sent me.
There was red flickerying on screen and then BAM, the entire screen went super bright RED!
all red for about a minute. and then I reached program menu and back to this page.
what the hell???


Not sure about that..
I works fine on my other pc thats not with me right now, i'll try it on this pc.
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August 4, 2012 9:36:27 PM

jay_nar2012 said:
Apparently on 100% load, you are meant to draw around 350-400w...

So does it make sense?
I am in PC wizard, where can I find the PSU fan?
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August 4, 2012 9:41:05 PM

When I press on the Power Supplier icon I get blank window.
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August 4, 2012 9:42:41 PM

On the 4th row down on the right there is a -/+ sign thing go on that.
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Anonymous
August 4, 2012 9:51:36 PM

jay_nar2012 said:
Apparently on 100% load, you are meant to draw around 350-400w...

(pssstt more like 300)
:) 
can we say massive PSU overkill?
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August 4, 2012 9:56:43 PM

Anonymous said:
(pssstt more like 300)
:) 
can we say massive PSU overkill?


Yep, definitely :D 
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August 4, 2012 10:02:47 PM

Well I wanted to stay protected for SLI in futrue perhaps. So am I good!?

And I can't use PC wizard.. I am afriad it can harm my system, I got again a sevral minutes of red screen.
I had to turn of pc..
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August 4, 2012 10:15:04 PM

You are right..
So I guess, and I hope god willing that I'm good.

Can I dance now? dance the happy dance?

Oh and please check back that private message I sent you about SSD and vitual memo
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August 4, 2012 10:17:02 PM

You can dance on the middle of the road if you want to.......
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Anonymous
August 4, 2012 10:32:56 PM

Ransome said:
Well I wanted to stay protected for SLI in futrue perhaps. So am I good!?

actually you can tri or quad SLI with that PSU. the 670s don't draw much power, under 175 watts. the "worse" thing you did was pay for a gold rated PSU when the load you have on it would give you the efficiency of a silver or bronze rated.

here. PSUs take a huge nose dive in efficiency under 20% load:


now fortunately for you it won't be as bad because that PSU performs better on low loads than most others.
Corsair AX850 850 W
Efficiency at Low Loads
Quote:
In the next tests, we measure the efficiency of AX850 at loads much lower than 20% of its maximum rated load (the lowest load that the 80 Plus Standard measures). The loads that we dial are (approximately) 40, 65 and 90W. This is important for scenarios in which a typical office PC is in idle with power saving turned on.
(CHART)
Efficiency with 41W load is nothing to write home about. However the situation dramatically changes with over 66W load and efficiency gets a significant boost as it easily passes the 80% mark.

your lowest efficiency is 76.29% at 41-54 watts; and then 82% @ 65 - 80 watts that is pretty much where you will be idling at the same efficiency of a bronze PSU.

when you go above 90 watts, a bit of a load, then having a gold rated PSU will pay off.

so get another 670 play a lot under 100% load for your gpus and cpu to get over 350 watts and be happy with a very efficient PSU :) 
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August 5, 2012 11:10:50 AM

Hey, just a question:
My PSU comes with only 2 PCI-E cables (those split cables that you connect the other two ends into the gpu) for Graphic Cards, and only two sockets on the PSU itself.

So how exactly can I connect 3 SLI cards? (not that I ever going to do that, I might go 2 way SLI when price of 670gtx goes down) if I don't have another cable and another slot to plug it ?

Thank you.

And so it make sense you say that the fan doesnt spins?

Oh and one last thing, when things are hot (it's a hot summer here) and no AC turned on the room, the core temptures are nearing 40C when using STEAM and downloading (not games or something heavy) and some are over, is that ok?
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Anonymous
August 5, 2012 1:46:55 PM

you should have four 6+2 PCI power cables

you then could use two 4 pin molex to 6 pin adapters that should comes with the gtx 670 for a total of 6 pci power cables.
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August 5, 2012 1:50:31 PM

its kinda ok. just that the psu fan should be spinning most of the time then
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August 5, 2012 3:03:34 PM

Anonymous said:
you should have four 6+2 PCI power cables
http://tpucdn.com/reviews/Corsair/AX850/images/Corsair_AX850_cables.jpg
you then could use two 4 pin molex to 6 pin adapters that should comes with the gtx 670 for a total of 6 pci power cables.


I searched over and over inside the bag that came with the PSU, I have only 2 6+2 PCI cables. And the PSU itself doesn't have slots for another cable.

Although I didn't realised all your explanation.

And BigTroll, no it didn't spin, not even when playing a game or running a game's benchmark.
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August 5, 2012 3:46:25 PM

Thinking about this, all PSU fans are supposed to spin on start up right? Ransome? have you seen the fan spin up when powering up your PC? Maybe call the manufacture to see if your particular fan is even supposed to spin during this time regardless of the load.
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August 5, 2012 3:47:08 PM

No it doesn't spin at all. Nor does it emit heat, its actually kinda cool.
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August 5, 2012 4:37:01 PM

if it doesnt heat up much, its fine
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August 5, 2012 5:12:45 PM

Doesn't heat up at all.
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