PC fan issue

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Hucklebury

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Hi there,

I recently had my PC upgraded, Haswell CPU with Asus motherboard (forgot the model, but it was very inexpensive).

Upon booting, the CPU fan moves a little, then stops, then moves a little, then stops, then moves full blast and makes a quite a loud noise for 4-5 seconds, then dies down and everything is normal.

So I thought that there might be a problem, but the guys from Chaos computers seem to think that this is normal behaviour. The cheaper motherboards exhibit this kind of 'problem'. Remember, this only happens when I boot my machine.

So I decided to pay a little more, get the new i5 6600 CPU with newer generation Gigabyte motherboard (not sure of the model, also very low cost (under R1000). The technician says the same thing is happening. That's it's all normal.

They showed me a PC in their shop using a much more expensive motherboard and the CPU fan operates normally from boot. So I don't know now if it really is a motherboard issue, because that would mean BOTH motherboards, even one generation apart, have the same issue.

What do you guys think? Should the fan be operating the way I've described and is that normal? It's just annoying to hear the fan ramp up into overdrive for several seconds each time the machine is booted. I don't remember this happening on my previous PC build, nor the PC fan behaving strangely on boot.
 
On startup many motherboards put all fans to full speed then slow them down. It shouldn't be stopping ever though... That is not right.
If the fan is stopping in your motherboard but works perfectly with another then your motherboard likely has issues.
 
Why didn't you check the settings on the motherboard before you bought another one?

There are a couple fan settings, thermal management etc that could be the cause of the problem.

I had this issue with a old AMD card, 5950 - the card blows full speed for couple seconds on boot and then winds down.
 
SYNERGY said:
Why didn't you check the settings on the motherboard before you bought another one?

There are a couple fan settings, thermal management etc that could be the cause of the problem.

I had this issue with a old AMD card, 5950 - the card blows full speed for couple seconds on boot and then winds down.
Click to expand...

I had a power supply fault with my previous PC build that prompted me to upgrade, hence the Haswell CPU/motherboard. Then I decided, spend a little more, get the latest Skylake CPU with newer motherboard.

Now my PC is at the shop, but the technician is telling me everything is normal. But the fan moving a little, then stopping - repeat, then loud noise is something that is bothering me.

How can it be affecting two different generation motherboards. That would be strange.

Edit : just got off the phone. He tells me all the entry-level motherboards operate this way. Which is upsetting.
 
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I had a similar problem years back. and it ended up being a power supply issue.

The spinning pattern was the same for me, but for me it happened prior to post.
 
Hucklebury said:
I had a power supply fault with my previous PC build that prompted me to upgrade, hence the Haswell CPU/motherboard. Then I decided, spend a little more, get the latest Skylake CPU with newer motherboard.

Now my PC is at the shop, but the technician is telling me everything is normal. But the fan moving a little, then stopping - repeat, then loud noise is something that is bothering me.

How can it be affecting two different generation motherboards. That would be strange.
Click to expand...

True. Monitor the temperature in Windows? I'm sure that it's a configuration-thermal management issue.

How loud is the noise?
 
I had that before. Can`t remember exactly how I fixed it, but I think it was a PSU problem. This was an AMD build.
 
SYNERGY said:
True. Monitor the temperature in Windows? I'm sure that it's a configuration-thermal management issue.

How loud is the noise?
Click to expand...

Well, on boot it, after a few seconds, it goes rrrrrrRRRRRRRRR..... sorry, probably not a good enough description, but it's quite loud. :D It sounds like the fan is moving really, really fast, then it dials back and everything is nice and quiet. But essentially it sounds like it's going into overdrive for 4-5 seconds.

This is on cold boot. If I restart the machine in Windows then no problem. Only while turning the machine on. I mentioned my power supply to the technician, and he said that it's just fine. No problem.
 
Hucklebury said:
Well, on boot it, after a few seconds, it goes rrrrrrRRRRRRRRR..... sorry, probably not a good enough description, but it's quite loud. :D It sounds like the fan is moving really, really fast, then it dials back and everything is nice and quiet. But essentially it sounds like it's going into overdrive for 4-5 seconds.

This is on cold boot. If I restart the machine in Windows then no problem. Only while turning the machine on. I mentioned my power supply to the technician, and he said that it's just fine. No problem.
Click to expand...

Get them to test with another power supply. They are a PC store, should have spares to test.

He should have other PC's to compare to in store as well.

You mention that it's on cold boot only. Does sound like a PSU issue...
 
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I'm using a Corsair VS450 PSU. I had a 750W PSU prior to that, because when my PSU died I needed something on a budget. Using a Radeon 5850 (an oldish card).

That's when I learned I needed a whole lot more than just a new PSU, but a new motherboard and new CPU. Took out my HDD too. Thankfully, not my SSD.

I'll ask them to test another PSU just to be safe. I assumed if the PSU wasn't working normally that the whole machine wouldn't boot? You are saying that perhaps the PSU is not providing enough power to the motherboard?
 
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Hucklebury said:
Well, on boot it, after a few seconds, it goes rrrrrrRRRRRRRRR..... sorry, probably not a good enough description, but it's quite loud. :D It sounds like the fan is moving really, really fast, then it dials back and everything is nice and quiet. But essentially it sounds like it's going into overdrive for 4-5 seconds.

This is on cold boot. If I restart the machine in Windows then no problem. Only while turning the machine on. I mentioned my power supply to the technician, and he said that it's just fine. No problem.
Click to expand...

This isn't an issue or a problem, the BIOS just puts the fan on full until it sorts itself out and gets temps etc and then adjusts fan speed dynamically. Graphics cards and chassis fans also do this. The only way to "solve" this is to buy a quieter CPU cooler or fans that you don't hear when it's at full.

My PC also does this...
 
Looks like it. Or it maybe damaged from a power surge etc

Post your full PC specs, and input them here: Linky
 
ScottulusMaximus said:
This isn't an issue or a problem, the BIOS just puts the fan on full until it sorts itself out and gets temps etc and then adjusts fan speed dynamically. Graphics cards and chassis fans also do this. The only way to "solve" this is to buy a quieter CPU cooler or fans that you don't hear when it's at full.

My PC also does this...
Click to expand...

Does that for the older generation GPU's. Never heard it doing that for the newer Intel CPU's thou.

Edit: Then again, I've always had a aftermarket market CPU Cooler...
 
Results:
Load Wattage: 292 W
Recommended UPS rating: 600 VA
Recommended PSU Wattage: 342 W

Amperage (combined)
+3.3V +5V +12V
7.7 A 6.8 A 19.4 A
 
SYNERGY said:
Does that for the older generation GPU's. Never heard it doing that for the newer Intel CPU's thou.

Edit: Then again, I've always had a aftermarket market CPU Cooler...
Click to expand...

Intel stock coolers are much much louder than aftermarket, just replaced my stock cooler and it's utter heaven...

OP it's not a problem unless it's REALLY loud and grindy, then the cooler may not have been mounted properly or the fan might be dodge.

To solve the annoyance issue either keep buying motherboards until you find one that doesn't do this or buy and aftermarket cooler which you can't hear. I've just bought this:

http://www.coolermaster.com/cooling/cpu-air-cooler/hyper-212x/

And it's like custard rustling at full tilt.

EDIT: the start-stopping behaviour is odd though, fans will usually come on full tilt then die down very quickly, only thing that could do that is PSU as mentioned or a PWM problem
 
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I have

*Gigabyte, I think H110M motherboard
* Intel i5 6600
*AMD Radeon 5850
*8 gb DD3 memory 1600
*SSD drive
*Corsair VS450 PSU

That's all I've got.
 
ScottulusMaximus said:
Intel stock coolers are much much louder than aftermarket, just replaced my stock cooler and it's utter heaven...

OP it's not a problem unless it's REALLY loud and grindy, then the cooler may not have been mounted properly or the fan might be dodge.

To solve the annoyance issue either keep buying motherboards until you find one that doesn't do this or buy and aftermarket cooler which you can't hear. I've just bought this:

http://www.coolermaster.com/cooling/cpu-air-cooler/hyper-212x/

And it's like custard rustling at full tilt
Click to expand...

I have no doubt about that. When my machine boots, past the start up noise, it's very quiet (to me). When I'm in Windows 10, it's all good. I can't hear the CPU fan. At all. The loudest noise is from my GPU, it makes a slight whining noise.

So although I'm sure buying an aftermarket cooler will help with noise in some way, I'm worried that on start up the fan will still ramp up to maximum speed, making that noise as I mentioned. Like I said, the noise dies down after 4-5 seconds. It's just the whole process is annoying.

Like others have said, perhaps it's my PSU (this was bought about 3 weeks ago, so it's still practically new).
 
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