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"Spare Parts" machine CPU fan speed issues

LHN91

Well-known member
Joined
Jan 17, 2013
Messages
105
Location
Dunnville, Ontario
Hi all,

So a bit of an odd problem with a machine I'm putting together from spare parts for my nephews.

It's an old Core2Quad Q6700 on an Asus P5KPL-CM with 4GB of DDR2 and a 460.

Certainly old but sufficient for homework and older games.

The issue I'm running into is that the Q-Fan control is simply not working at all. The fans stay at idle speeds no matter the temp, and the CPU clocks down as soon as it hits 70c as reported by HWMonitor.

Obviously I can run the fan at full blast or put a non-stock cooler on it with a quiet fan (which I might yet do) but I'd rather not.

Any suggestions? I'm not overclocked, the BIOS settings are largely default, and Q-Fan is enabled.
 

KaptCrunch

Well-known member
Joined
Feb 23, 2008
Messages
4,075
Location
Ontario
possible the PWM is dead

try another known good 4 wire fan ON CPU FAN HEADER while using CHA-FAN to power current mounted cpu fan to see if its the motherboard issue or fan

or the CPU thermistor is gone on MB
 

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ZZLEE

Well-known member
Joined
May 31, 2009
Messages
2,451
Location
KANATA
Make sure something is plugged into cpu header or it may not post.
 

sswilson

Moderator
Staff member
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Dec 9, 2006
Messages
17,939
Location
Moncton NB
Are there any kind of sub menus for the q-fan control? It sounds like you're on "ultra silent" mode or something like that.
 

LHN91

Well-known member
Joined
Jan 17, 2013
Messages
105
Location
Dunnville, Ontario
FYI this is a stock Intel CPU fan at the moment.

I've got the Q-Fan configuration set to Performance, but the only way I've found so far to get the speed to come up is to disable Q-Fan - which makes the stock Intel cooler sound like a banshee at 3800 rpm.

It is possible the PWM is dead, but not sure. I can try Speedfan to see if it can control it - the other option might be to grab my spare Hyper 212 and just put a quiet fan on it and call it a day.
 

LHN91

Well-known member
Joined
Jan 17, 2013
Messages
105
Location
Dunnville, Ontario
So it turns out I have a second P5KPL-CM hanging around.

I swapped it in, and no difference.

Also swapped to a Hyper 212 and no luck there either.

At this point I think I'm down to:

- Bad CPU (This was a CPU I had overclocked before to around 3.15 Ghz a while back)
- Windows 10 driver issues
- Bad PWM headers on this model of motherboard
- Some kind of issue/incompatibility with these boards and either the Q6700 or other hardware

The Hyper 212 isn't terribly loud even at full blast, so for now I've just disabled Q-Fan and it's running fine otherwise, with the added benefit of the temps topping out around 50c.

This is going to my wife's nephews (8 and 10) to type up homework and play Lego PC games, essentially, so I'm sure they'll be happy with it and a little bit of fan noise isn't going to bother them.

Thanks for the suggestions!
 

christ_himself

Active member
Joined
Nov 11, 2014
Messages
35
Location
Quebec
i have had probleme with this issue back in the days witk a p5k-pro. there was a bios updated fixing the issue

my son is still rocking my q6600 at 3.7ghz with a hd7950 those were great cpu's
 

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