PC fan issue

Pfft, my PC did that from the day I got it until when I gave it away recently (Asus motherboard).
 
Hucklebury said:
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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From your later posts it's not your PSU, you've got plenty of headroom with that rig on that PSU.

As I said, many mobo's do this, either buy one that doesn't or get an aftermarket cooler that you can't hear at full that won't annoy you.
 
ScottulusMaximus said:
From your later posts it's not your PSU, you've got plenty of headroom with that rig on that PSU.

As I said, many mobo's do this, either buy one that doesn't or get an aftermarket cooler that you can't hear at full that won't annoy you.
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Yeah, but how will I know which motherboards don't exhibit this issue? I can't ask the store to test every model until it the issue stops :D and I can't just keep on buying motherboards.
 
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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Do you still agree with this? You think the start-stopping is normal of budget motherboards?
 
If that's the case then both motherboards and both CPU fans would have to have been faulty. :) I had motherboards replaced (different generation and model) and newer generation CPU. Same issue.
 
Hucklebury said:
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.
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It's normal. My MSI MB does the same thing, spin-stop-spin-stop-full rpm-normal rpm, all this happens in about 3 seconds. GPU also spins up to full rpm before shutting the fans down.

It's normal start up operation and I can't see why it's bugging you.
http://superuser.com/questions/4277...cpu-fan-to-high-speed-momentarily-when-powere
 
ponder said:
It's normal. My MSI MB does the same thing, spin-stop-spin-stop-full rpm-normal rpm, all this happens in about 3 seconds. GPU also spins up to full rpm before shutting the fans down.

It's normal start up operation and I can't see why it's bugging you.
http://superuser.com/questions/4277...cpu-fan-to-high-speed-momentarily-when-powere
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The reason it was bugging me was because my previous PC build (Ivybridge I5, Asrock motherboard) did not behave like this. The CPU fan started immediately, no loud rush of noise (for a few seconds).

After phoning around, it seems you're right - one technician said it's a loop cycle test. The motherboard checks that everything is working. He said many modern motherboards do this.

Since I never experienced this prior to the new build, I assumed there was a problem. It'll bug me because if I hibernate on Windows 10, each time it will do the same start up operation. I guess I'm just very picky about these things. :D

Thanks for your post! And for providing me with the link.
 
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Hucklebury said:
I guess I'm just very picky about these things. :D
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ear-plugs-300x289.jpg


Also handy if you're married :p
 
Not one of my PCs, even recent mobo's do the stop start stop start thingy. Yes the fan runs at almost full speed on post, but dies down after about 2 seconds to normal.

Why would the fan stop ?
 
Dan C said:
Not one of my PCs, even recent mobo's do the stop start stop start thingy. Yes the fan runs at almost full speed on post, but dies down after about 2 seconds to normal.

Why would the fan stop ?
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I aggree. Kick start @full speed is understable. It is needed to overcome friction, so fan starts turning on, but then it should drop to the normal speed. If it drops to zero few times, it is not normal.
 
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Something just dawned on me. I have a dedicated fan controller. Surely if I connected the CPU fan to my fan controller then there shouldn't be any issues at all? If so, I've been an idiot.:o
 
Hucklebury said:
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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I built a PC for a friend recently with that exact same PSU. It powers on for a second, then powers off, then powers on again. After that it's perfect. I suspect it might have something to do with the initial burst of power required by the system being too much for this PSU to handle.

I have the exact same motherboard as my friend, but I use a Corsair VX-450 PSU and I don't have this problem.

The issue isn't motherboard related. Definitely the PSU. I don't think it's a serious problem though.
 
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