CPU Fan Error At Boot - 2 x Noctua NF-F12's ?

Bint Box

Bint Box

Bint Box

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Hi,

Would anyone please be able to assist me in resolving an error message I am getting at boot up?

I have 2 x Noctua NF-F12's connected to a Corsair H80 radiator with each Noctua fitted with the LNA adapter to limit the speed to 1200rpm. The 2 Noctuas are then connected to the PWM Y spliiter that came with the fans and this then connects to the single CPU fan header.

On boot, I am getting the message:

CPU Fan Error
Press F1 To Run Setup

On pressing F1 and entering the BIOS I can see that the CPU fan monitor indicates 357rpm and the indicator bar is coloured red whereas the other fan indicator bars are blue. After entering then leaving the BIOS the boot message keeps coming back and the PC will not progress beyond this point. It seems that the registered spin speed is too low for the BIOS to accept as safe even though the fans are both spinning and the CPU is showing at 25C?

The motherboard is an ASUS P8Z68 Deluxe and it is only since fitting the Noctuas in this configuration that I have received the error message. I had hope to be able to use the LNA adapter with the Noctuas to limit the speed to 1200rpm and also to use the PWM option by connecting to the 4 pin CPU fan header but it does not seem to work at the moment?

Any advice most appreciated


Rgds
Bintos
 
Rooster212 said:
Should the H80 pump not be plugged into the CPU fan pins?
Click to expand...

I am not sure if that is mandatory, the H80 block that sits on the CPU has two leads coming out of it, one with a 3 pin fan connector and the other a molex connector. If I connect the 3 pin fan lead from the H80 to the CPU fan header I have lost the PWM option and am then restricted to the 3 settings available from the H80 block.

I had hoped to be able to use the PWM option from the 4 pin Noctua fan leads rather than have them set on a fixed speed.


Thx for the reply.


Bintos
 
I would plug the h80 into the cpu_fan header and the Nf-F12is into the h80.

If you want to use the pwm, maybe plug that into a different fan header on the board?
 
OptimaLnrg said:
I would plug the h80 into the cpu_fan header and the Nf-F12is into the h80.

If you want to use the pwm, maybe plug that into a different fan header on the board?
Click to expand...

Thx for the reply, however, how do I use the PWM when the Noctuas are plugged into the H80 and the H80 is connected to the CPU fan header? It's not possible to use the Noctua PWM in that configuration unless I am missing something?


Rgds
Bintos
 
For the initial suggestion I meant plugging the fans directly into the pump.

FYI I use a single gt1850 on my h80 and I always use the low setting, temps are fine.

You can plug the fans in elsewhere though, the board must have other pwm headers for you to use.

Or you could put them on a fan controller. Lots of options to try out.

To get your pc working in the short term you can plug them directly into the h80 though and work out how you want to do it from there if it's too loud.
 
I had the same setup up to a day ago. H80 on an asus p8Z68-V- LX . nf f12's put into cpu fan header with a y splitter (molex cable to 4 fan-females and one of the females taking the PWM signal) and h80 pump PWM cable onto a chassis fan header on the board.


Same error messages, but once out of every two times. had the voltage reducers on the nf f12's too. taking them off solved the problem but i wanted to run the pc with them on.

way i got round it was to press f1, enter bios then exit bios straight away without saving any changes. Then i just put pc to "sleep" rather than shutdown at night
 
also, i found them to be quieter and get roughly same temps just by putting the voltage reduced nf f12s into the h80 unit as its meant to be.....but im just picky and wanted custom fan profiles.... up to you
 
change the fan low speed warning in the bios / monitoring section lower it down to 100 then you wont get the warning at boot if you want to keep running it from the cpu header
 
Thx for all of the replies, I have got several options to move forward with. To get the PC to boot with the Noctuas I have plugged them directly into the H80 then the H80 to the CPU fan header. At idle the CPU temperature in the BIOS is showing as 30C with the pair of Noctuas plugged into the H80 and the H80 set to low, would that be normal or should it be lower?

I will have a tinker with the fan low speed warning in the BIOS later and also have a tinler with the LNA's on the Noctuas both in the H80 and into the CPU header.

Thx for all your help, most appreciated.


Rgds
Bintos
 
yeh with low and voltage reducers 30C is reasonable....maybe down to 28 if lucky. Dont know exactly what you are cooling though :s ...my i5 2500k was 28-34 at idle with that setup on LOW depending on room temp. it was OC'd to 4.5GHZ
 
cowello said:
yeh with low and voltage reducers 30C is reasonable....maybe down to 28 if lucky. Dont know exactly what you are cooling though :s ...my i5 2500k was 28-34 at idle with that setup on LOW depending on room temp. it was OC'd to 4.5GHZ
Click to expand...

I am cooling an i7 2600k running at a stock 3.4GHz. I thought I should get the fans and cooling configured before I started to crank up the CPU.


Rgds
Bintos
 
Last edited:
How loud is this sort of setup with just one noctua fan connected straight to the motherboard cpu fan header? Would one fan be good enough to overclock an i5 to 4.5GHZ?
 
... well yes, your CPU will be kept under the manufacturers max temp with just one fan...you get roughly 30% more effective airflow with a push-pull setup. It'll probably run slighter hotter wioth just one fan but the air will still be taken away from the rad.

I was thinking that one fan would have to spin faster to get the same results as push-pull...so more noise..BUT then again, the noise of two fans together sounds louder to me personally with past experience. Not too sure on that one

Here is a vid a shot when i had a problem with my H80... take note of the portions of the video where the pump isn't being faulty..youll see how loud the fans are on different settings
http://www.youtube.com/watch?v=1qjGB0TDvRY&context=C458d39cADvjVQa1PpcFP2t-u0mcKiNBVpkn64vo2G7yAZ7Dhl0cQ=
 
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