Maximus Formula Fan error

[fernandows]

Hi, Im from Argentina. (sorry my english hehehe)

Ibought a maximus formula a and put my shuriken on it. but when power on the PC, i get an error with the rpm, it show at 420rpm... with Q-Fan command, but i change it to de hi performance and it's still low (600rpm aprox)... only disable the q-fan can get the full rpm 2200, but the noise! i cant sleep! hehehe, I try with the intel stock heatsink and no problem, works great... HELP! hehehe

Thanks from Argentina.

PD: Yes! i'm not good in english!

PD2: I'll translate the thread if some one speek spanish

Compré un maximus formula, y le puse mi shuriken, pero cunado prendi la pc me salio un error de Fan, miré las rpm y me daba 420rpm con el Q-fan, estaba en silent, pero lo cambie a performance, pero me seguia dando rpm baja (600rpm aprox), le saque el qfan y levanto a 2200rpm pero del ruido que hace no puedo dormir! jejeje, probé con el intel que venia de fabrica y funciona bien... Ayuda! jejeje

Bueno creo que no hacia falta traducirlo literalmente... jejejeje

[hiroshige]

Hello and greetings to Argentina!

Hm this sounds quite strange, as if the ASUS-Board doesn't give enough power for the shuriken-fan to power up.

I just forwarded your request to Scythe.USA, they will answer you. I would suggest them to send you a new Fan for the Shuriken.

Cheers,
Stefan

[k_numigl]

Hi, I have a similar problem:

With an ASUS P5645GC, the BIOS reports a 'CPU Fan Error' and the Shuriken does
not turn at all (only for a short moment after switching the PC on). When I disable
the 'Fan control' in the BIOS, the fan turns at full speed. This is definitely not what you want, though. There have been no problems with the original Intel boxed cooler/fan set (4 pin PWM), which the Shuriken should replace.......

[k_numigl]

My reported 'cpu fan error' from the ASUS BIOS is due to the BIOS. When using Speedfan
things work perfectly. It seems that the initial speed of the Shuriken fan during the boot
process (max, i.e. 2200 rpm) is too low for the ASUS BIOS. Thus, the BIOS detects the
lack of a fan it could control, reports an error, and shuts down the power of the PWM
line to the fan.

As there are plenty of fans around running at low speeds, I regard this as a bit
poor for a modern BIOS. (I'm using the latest available, 801)

At the moment I use Speedfan, but I would prefer to have the job done by the BIOS
(i.e. not by a Windows programme).
A solution would be a fan with a higher initial speed, but I could not find out yet what
the threshold of the ASUS BIOS is. There is some saying it could be 2500 rpm. I'll
try to find out. There is little documentation of the Q-Fan utility from ASUS, and
thresholds might vary from MoBo to MoBo, so it might be difficult.

As a general test whether or not the fan is ok, or whether the programme which controls
the fan is the guilty one, a test with Speedfan is a good idea when problems occur.

Ciao, Klaus

[hiroshige]

Hey Klaus,

thanks for the Info! Actually, PWM seems to cause some problems on ASUS-boards, but now this in one real clue for this!

Cheers,
Stefan - Scythe EU Hamburg

[k_numigl]

Yesterday I cross checked with the Intel boxed cooler/fan set, and it turns out
that the world is less simple than thought:

The Intel fan does also turn at relatively low speed: 1700 rpm.
Nevertheless it is recognized and controlled by the Q-Fan ASUS BIOS utility.
No error is displayed, and under cool CPU conditions the fan is slowed down
to about 800 rpm.

Changing back to the Shuriken again gives a 'CPU Fan error' message.

So all you can really say is that the Shuriken and the mainboard/BIOS are
incompatible for some unknown reason. And that the Scythe fan must
differ from the Intel boxed set in a way the mainboard/BIOS does not expect.

Would have been nice to have solved this mystery, unfortunately this
is not the case......

Ciao, Klaus

[hiroshige]

Hello Klaus!

Actually, the slowest Speed for Shuriken to start is about 650 rpm. Maybe, the ASUS board is not able to measure lower than 700-800 rpm?

Kind regards,
Stefan - Scythe EU Hamburg

[Oli]

My Asus P5K Dlx is reporting fan errors for all fans dropping below 550-500 rpm. As I am running Slipstream 500 fans only I had to ignore/disable all warnings.

As the BIOS doesn't know the fans diameter and only checks the pure rpm these errors appear. The Intel boxed cooler with its small fan diameter needs much more rpm to move the same amount of air.

For your Asus board the alarm values for rpm seem to be even higher than with my board.

[k_numigl]

Hi again. Checked the following:
- The board _measures_ down to almost zero (hand spin the fan = counts in the low 100)
looked up in the BIOS (or ASUS PC Probe)
- It sets the Intel stock fan to about 800 rpm with a cold CPU
I could not find any documentation on the Q-fan utility which would give a clue
about rpm thresholds and at exactly which moment these are determined. Wouldn't
help either, as I cannot modify the utility anyhow. This is a pity, because Speedfan
compomises my audio recording stream and I would like to get rid of it.
Cheers, Klaus

[k_numigl]

Today I installed a Kama PWM 92 mm in place of the original slim fan which came with the
Shuriken. This fan in fact works with the ASUS board and its Q-Fan utility! Speed with a cold CPU
is about 280 rpm (and ASUS' PC Probe complains about this - doesn't matter). With the
combination of the Shuriken cooler and the Kama fan, the mobo is operational again -
without the need for Speedfan and without getting CPU Fan-Error messages by the
ASUS BIOS. The Kama was just fitting in my relatively small PC case.

My suspicion is that ASUS measures very early during the boot process which speed
the CPU fan has, and, if ASUS feels this is too slow, it decides to shut off the PWM
power. Then the Shuriken slim fan does not speed up fast enough, while the
Kama does. Just a guess, as still no Q-Fan documentation could be found.

Regards, Klaus