CPU Fan not spinning... but wait...

I'll give the max, 2.0 PWM per °c then. Just booted up, got to desktop, and ET6 settings have been "forgotten".

Fan wasn't spinning. Had to open ET6 again and set it to 65% again. Ridiculous.

I'll go to the bios and set it to manual.

This is annoying as hell.
 
The max was 2.5 PWM per °c which I set.

Booted. Fan not spinning.

Nightmare.

Gigabyte suck.
 
I set it to 65% at 30°c and then uninstalled ET6. Just rebuilt the icon cache because Microsoft are too lazy to patch that issue, rebooted and my CPU fan is running at 600-700rpm.

I'm thinking ET6 was causing the issues. Even though I don't think it booted with Windows, I think that "35%" default that ET6 was set to (even though the 65% never stuck every time I rebooted), I think this is what was causing the CPU fan not to spin up.

I'll keep an eye on it and post back.

Yes. ET6 seems evil, an I hope that it was the culprit.

Unbelievable. Just to think this could bugger peoples computers.
 
Code: 
CPU_FAN:
Pin No. Definition
1 GND
2 +12V /Speed Control
3 Sense
4 Speed Control

SYS_FAN1:
Pin No. Definition
1 GND
2 +12V /Speed Control
3 Sense
4 Reserve

I wonder if the 4 pin fan header is running both PWM and voltage control at the same time. As far as I can tell Gigabyte use voltage control on Pin2 when it's selected and 12v when PWM is selected. If both types of fan control were in use at the same time then 35% would normally be around 4-5v on Pin 2, just enough to start or keep a fan running. If PWM was also running on Pin 4 then your voltage would be waaaay down in the 1v region.

Not sure if I've explained that very well.

What happens if you plug a 3 pin fan onto the 4 pin header when it's set as you have it now? Does it spin up? If you have a multimeter try probing Pin2 of the 4 way CPU_FAN connector, or the little windows on the fan connector.
 
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Only the CPU_FAN is PWM.

SYS_FAN1 is 3 pin function as 4th pin is not used for anything.

Reserve = not in use at this time.. saving for later use on something else. ;)
 
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Yes the side fan is pluged into System Fan at the bottom of the board, just above the PSU. That is fine. It shows up in OpenHardwareMonitor spinning at a reasonable 700rpm+.

The CPU fan is plugged in, I didn't check yesterday but I checked millions of times OCD style the other day, just to make sure so I was certain that it was plugged in yesterday.

I'm pretty convinced the culprit was in fact ET6. I still have the fan on 2.50 PWM per °C, I'm yet to change that back to Auto, but I think the problem may be solved - fingers crossed.

Again, I'll keep an eye on it, but yes, that ET6 software isn't friendly at all.

Fortunately, my CPU never went over 40°c when the CPU fan wasn't spinning, spending most of it's time around 31-34°c, which is fine since the MAX temp is 72.6°c on the Core i5-2500k.

Now I'm going to play Metro 2033 lol
 
Can I suggest something. Something that I would think obvious considering what's already been tried.

The fan unit is faulty.

I run a Gigabyte board with a Matterhorn and mine runs fine.

On idle the fan drops to around 500rpm but has gone as low as 450rpm before.
 
Please read my previous post.

ET6 was the culprit. I've not had any issues so far since uninstalling that Utility.
 
ET6 was on there. I just didn't realise.

Even if it didn't start up, it was keeping the CPU fan at 35% which wasn't enough to spin up.

At the moment, I'm at 650-720rpm.

It got up to 960rpm when I was playing Metro 2033, but the temps reached 50°c. I know that this is fine, but I'm not impressed.

I think I'll go stick it back on Manual and put it on Max - 2.50 PWM per °c in the Bios.

It is currently on auto.
 
A PWM fan should be able to spin at 35% even when it's stopped by hand.

I have two PWM fans installed, a 140mm @1300rpm and a 120mm@1300 rpm and both will start up at 20% duty cycle from a stalled condition. Even a typical DC fan of this sort of speed rating will happily spin, once started, at 150rpm with PWM at 5% as the incoming voltage kick of 12v every 1/25000th of a second is sufficient to overcome the inertia of the bearing.

What you have is an issue somewhere which is either a problem with your fan or the motherboard controller, maybe as I described earlier in the thread, which was a guess by the way.
 
What the hell!?

FOR **** SAKEEEEE.....

But everything seems okay?

How can the CPU fan be broken?

The header works, how can it half work? That's ludicrous.

I'm going to stick the CPU Fan Controller method to Voltage.

Getting seriously ****ed with all this ****.
 
Bye bye.

I am accepting your help, but my anger is not directed at any of you.

I'm just going to ignore ET6's settings and readout.

The main thing is, is that the ET6 is uninstalled and the minimum the CPU fan spins at is 550-600rpm at 32-34°c. And of course now it doesn't stop.

When I tried Voltage as the means to control it, the readout gave me 300rpm. Spooky.

I turned it back to PWM and Normal mode. There was another setting in Voltage settings. PWM something or other. Went from Low, several steps up to High Perf, and the max eXm :S
 
UKFX said:
What the hell!?

FOR **** SAKEEEEE.....

But everything seems okay?

How can the CPU fan be broken?

The header works, how can it half work? That's ludicrous.

I'm going to stick the CPU Fan Controller method to Voltage.

Getting seriously ****ed with all this ****.
Click to expand...

Poor manufacturing, Poor base materials, unseen damage during transport & incorrect usage are just 4 of the many possible reasons that the fan could be faulty.

It happens with ANYTHING, this is why warranties exist, because there are circumstances in which something could fail ahead of what is deemed a fair product life.

Yes it's annoying when things fail earlier than expected but that's life. Deal with it and move on.

I'm sure you've got a friend with a similar setup, go try your fan in their machine, if it still fails then it's the fan. If it's still under warranty get it replaced by the manufacturer rather than runnng off your mouth on a forum of people trying to help you.
 
Nah I'm good.

I'm just going to ignore ET6.

500-700rpm minimum, spins up to 900-1000 RPM when playing games, but doesn't go beyond 48-50°c when playing Metro 2033, when the internal case temp is 28-30°c and the ambient room temp is 25.0°c. I'm sure it will spin up more if it gets hotter. The main thing is that it isn't stopping, or not starting.

When the CPU downclocks to 1600Mhz, at 500-650rpm I'm sitting at 29-30°c when the case temp is 24°c and the ambient room temperature is 25°c. When playing games, it uses Turbo Boost, so it goes beyond the stated 3.3Ghz, to around 3.6/3.7Ghz, yet despite these ambients and the low RPM the CPU is usually around 47-48°c, but no more than 50°c when playing games for several hours.

Overclocking shouldn't be an issue. I'm pretty certain the fan will spin up more if need be. I have the CPU Fan Control method set to PWM and it is on Automatic / Normal.

I just think ET6 is wrong and that nothing is actually broken in my system. I was just under the impression something was wrong until I removed that utility.
 
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