CPU fan error on new build

Hi All.
I have assembled my new puter but on boot I get the message PCU fan error, but the fans are working OK, what am I doing wrong.

 

O.K.
It's been sorted.

 

I am glad you got it sorted out and posted back here to say so, but understand the purpose of forums like this is help each other out by sharing what we know. Saying only "it's been sorted" helps no one who may encounter the same problem.

 

Hi.
In hindsight I should have explained, this is a new m/board with a different setup screen so a bit confusing, the CPU alarm was going off because it was set to go off if the fan went below 600rpm, my CPU fan operates at between 450 & 500rpm so I had to reset the alarm at 400rpm, problem solved, easy when you know how, I can't be that dumb as nobody else had the answer.

 

Having encountered a particular problem before, or not, is no indication of being dumb or smart. And no one answering does not mean no one had the answer. It just means no one with the answer read your question!

Nevertheless, I am glad you figured it out and thanks for coming back and posting your solution. I would add, however, that 450 to 500RPM is not typical for OEM or aftermarket coolers - which typically run around 1000-1300 RPM or faster as seen here, 600 is normally (with a couple exceptions) the slowest.

With that in mind, I would urge you to keep a careful watch on your CPU temp and don't let it stay over 60°C for any extended period of time. There are many HW monitors but I use and recommend CoreTemp for newer Intel and AMD CPUs.

 

Hi Diger.
Tried to download "Core Temp" but my security systems blocked it, must be something nasty in there.
Wal

 

No there isn't. Must be a false positive with your security program. You can download it from Major Geeks' download page here.

Note because hardware monitors dig deep into the hardware levels of our systems, some security programs see that as "suspicious activity". CoreTemp is definitely safe and I use it on all my systems.

 

I'll vouch for it also. I've used it and never had any security issues from it.

 

I agree the fans seem a bit slow, but they are not really, it's just that they wind up slowly when you boot up, so consequently the bios gives a warning, they have to be set at a min rpm of 300 to stop the alarm going off, as you start working the bios adjust the speed to the level that is required. I am using a Noctua NH-D14 SE2011 D-type Premium Cooler, which has 2 4in fans.
Love to all.
Wally

 

A slow starting fan is often a sign the lubricant is breaking down and/or the bearings are worn or damaged.

Since it can take a mere second or two for a CPU to go from cold to overheated, I again urge you to monitor those temps closely - especially if you need to set their rotation speeds down so low.

I note large fans (they are actually 140mm fans on that cooler) move massive amounts of air but at a lower RPM. So I feel more comfortable with your speeds knowing now which cooler you have. You are using the required Y-cable, right?

But as you noted, that coolers uses two 140mm fans. Being huge and two of them, they may demand more starting power than expected by the motherboard maker, since it always takes a lot more energy to start motors spinning than it does to keep them spinning. That might be your "slow to spin up" problem and it may be better to power those fans directly through the PSU and disable the CPU fan monitoring in the BIOS altogether. That way, you can bump the rotation speed up to 600RPM or so, and provide more than enough cooling but still maintain near silent operation.