CPU fan suddenly faster and noisier

Discussion:

(too old to reply)

scbs29

2015-03-11 18:56:32 UTC

Hello all
When I switched on my pc this morning I was greeted by a black screen
stating:

Stepping A CPUID 0001067A
Cache L1 Size 644 Kb
Cache L2 Size 2048 Kb
Press F12 for BBS popup
The machine is operating with
DDR2 800
Dual channel mode
6144 Mb OK
CMOS checksum bad
Press Del to run Setup
Press F1 to continue

Pressinhg Del showed nothing untoward and pressing F1 booted into
Windows 7 with no problem.
This happened a couple of times and then 'went away' and the pc now
boots up as usual with no error messages.

Since the above occurred, however, when switching on, the CPU fan runs
as usual, nearly silently, then it speeds up and gets much noisier. No
mechanical noise to suggest bearings, just the noise of air being
moved by the fan and the fan turning faster.

Running CoreTemp gave the following:

Tj. Max 100
Core Temp Min Temp Max temp Load
0 36 31 45 2%
1 28 24 32 2%
2 37 37 40 2-83%
3 36 32 40 2%

So I assume that the problem is not temperature related.

The time and date on the pc are correct.

Following advice I cleaned out the inside of the pc with compressed
air. There was hardly any dust in the case, in fact I could not see
any at all when I used the compressed air.
This made no difference.

There have been no changes to the software or hardware since I shut
down last night.

Can anyone advise ?

If there is a newsgroup more suited to this type of problem I would be
grateful to be pointed in that direction.

Packard Bell iXtreme X6620 UK
Intel Core 2 Quad Q8300 @ 2.5GHz
6 GBytes DDR2 RAM
NVIDIA GeForce GT 220, 1Gbyte RAM
Windows 7 Pro, 64-bit

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Mayayana

2015-03-11 19:04:15 UTC

Permalink

You can check the actual running speed with
Hardware Monitor:

http://www.cpuid.com/softwares/hwmonitor.html

If it's not going faster.... Is the room cold?
I find that in many cases fans will make noise
until they warm up. My current graphics card
does that. We keep the thermostat at 62 during
the day and 55 at night. My office is generally
colder than that. I'm guessing the problem may
be a case of minimal clearance around the fan
blade, but it's never caused any problem and
goes away once the machine warms up.

scbs29

2015-03-11 19:42:50 UTC

Permalink

On Wed, 11 Mar 2015 15:04:15 -0400, "Mayayana"

Post by Mayayana
You can check the actual running speed with
http://www.cpuid.com/softwares/hwmonitor.html
If it's not going faster.... Is the room cold?
I find that in many cases fans will make noise
until they warm up. My current graphics card
does that. We keep the thermostat at 62 during
the day and 55 at night. My office is generally
colder than that. I'm guessing the problem may
be a case of minimal clearance around the fan
blade, but it's never caused any problem and
goes away once the machine warms up.

Thanks for your reply

I downloaded and ran the monitor as you suggested.

I have 2 fans in my system apart from the one in the PSU, one on the
CPU and another at the rear of the case which was fitted when I had
the PSU upgraded from 250 to 750W.

The fan speeds reported are:
FANIN0 3792 RPM - I assume this is the CPU fan
FANIN1 533 RPM

FANIN0 speed just reduced to 3590 RPM and the noise diminisihed a
little.

There is also a report for FANS PWM
FANPWMO 0%
FANPWM1 0%
FANPWM2 50%

The fan noise never occurred before this morning and does not go away
when warmed up or depending on the room temperature.

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Davey

2015-03-11 22:09:20 UTC

Permalink

On Wed, 11 Mar 2015 15:04:15 -0400

Post by Mayayana
We keep the thermostat at 62 during
the day

Any particular reason?

--
Davey.

VanguardLH

2015-03-11 22:30:07 UTC

Permalink

Post by scbs29
Hello all
When I switched on my pc this morning I was greeted by a black screen
Stepping A CPUID 0001067A
Cache L1 Size 644 Kb
Cache L2 Size 2048 Kb
Press F12 for BBS popup
The machine is operating with
DDR2 800
Dual channel mode
6144 Mb OK
CMOS checksum bad
Press Del to run Setup
Press F1 to continue
Pressinhg Del showed nothing untoward and pressing F1 booted into
Windows 7 with no problem.
This happened a couple of times and then 'went away' and the pc now
boots up as usual with no error messages.

Seems a several folks are concurrently reporting their CMOS battery got
weak or died. Replace the CMOS battery. It's likely a CR2032 that you
can get at a grocery or department store.

After replacing the CMOS battery, reset the CMOS to ensure it has no
corrupt or invalid settings and force the BIOS to reload its defaults
into the CMOS copy (which is where the settings are read instead
directly from the slower EEPROMs used to store the BIOS). The manual
for the PC or the motherboard should tell you how to reset the CMOS.

If you customized the BIOS settings (which then get updated in copy in
the CMOS table), you will lose those on a reset (clearing) of the CMOS.
The default suite of standard settings from the BIOS gets copied into
the CMOS table upon a reset. You'll have to go back into the BIOS
screens to go back to reconfigure your custom settings.

Post by scbs29
Since the above occurred, however, when switching on, the CPU fan runs
as usual, nearly silently, then it speeds up and gets much noisier. No
mechanical noise to suggest bearings, just the noise of air being
moved by the fan and the fan turning faster.
Tj. Max 100
Core Temp Min Temp Max temp Load
0 36 31 45 2%
1 28 24 32 2%
2 37 37 40 2-83%
3 36 32 40 2%
So I assume that the problem is not temperature related.
The time and date on the pc are correct.
Following advice I cleaned out the inside of the pc with compressed
air. There was hardly any dust in the case, in fact I could not see
any at all when I used the compressed air.
This made no difference.
There have been no changes to the software or hardware since I shut
down last night.
Can anyone advise ?
If there is a newsgroup more suited to this type of problem I would be
grateful to be pointed in that direction.
Packard Bell iXtreme X6620 UK
6 GBytes DDR2 RAM
NVIDIA GeForce GT 220, 1Gbyte RAM
Windows 7 Pro, 64-bit

Could be a problem with settings in the CMOS that are invalid due to a
weak or dead battery. Could be you are running process(es) that slam
the CPU usage to 100% or close to it. Could be due to heat from not
regularly (like annually) cleaning your PC.

More running processes = more continuous CPU usage = more heat.

If your CPU is running at high usage all the time or for long periods,
the thermally-controlled fan will speed up to handle dispersing the
greater heat output of the CPU.

The fan isn't controlled by how many processes are running but by how
hot is the CPU. Hotter = more RPM.

Perhaps it is time to get a can, or two, of compressed air and blow out
all that lint, dust, and hair that has accumulated inside the PSU, on
the motherboard, in the video card's fan and heatsink, in the CPU's
heatsink and fan, and everywhere else. Dust is a thermal insulator, not
conductor, so a blanket of dust will keep in the heat rather than let it
conduct away. You like a toasty blanket on a cold winter day but the
computer never likes dust blankets.

If raising the CPU's fan speed doesn't dissipate enough heat, the CPU
will throttle down (reduce duty cycle) so it works less hard (everything
runs slower) which has it produce less heat. So not only might the fan
speed(s) go up but your machine's response could slow down. If raising
fan speed and CPU throttling aren't enough, eventually the motherboard
will shutdown the system if the temperature gets too high.

Although you might think it is the CPU fan that is getting noisier
(because its RPM increases since more turbulence means more noise), it
could be your GPU's (video card's) fan. When playing games, doing video
editing, or anything that is video intensive, the GPU will heat up more
just like the CPU heats up more when it is more busy. While there are
some utilities to monitor and even try to regulate the GPU's fan, most
newer card self-regulate their fan's RPM. So, again, what processes you
have running can affect how busy is the GPU and how hot it gets that
requires a faster spinning fan to cool it off. And, again, dust is a
heat insulator and heatsinks and fans for video cards or onboard video
chips will get dirty and need to get dusted off regularly.

By the way, when directing the blast from an air can at fans, put a
finger on the fan blades or hub to keep it from spinning while blowing
the dust off its blades. Don't blow on the fans to make them spin.
Dust is often sticky. Just blowing air may not thoroughly clean a
surface of dust, especially fan blades that impact the dust rather than
dust merely landing on something. Blow off the fans (while keeping them
from spinning), use an ear swab to scrub loose the impact filth, and
blow again.

Paul

2015-03-12 01:44:03 UTC

Permalink

That one is interesting.

On a Dell, the fan could go crazy, if the CPU crashes and
the hardware uses defaults. The fan becomes a
vacuum cleaner on a Dell, if say, you unplug the
CPU ATX12V power cable.

Another possible source of vacuum cleaner noises,
is an expensive video card. There is one kind
of malware that uses ATI video cards to
compute Bitcoins. This makes the video card hot
and cranks up the fan. But that would start after
the OS loads.

Vanguard suggests replacing the CMOS battery.
Which is one possibility. You can take a voltage
reading off the top of the battery, with a multimeter,
using an I/O screw as a ground connection. Voltage
should be between 2.3V and 3.0V+. If the battery
is significantly below 3.0V, you likely have about
three weeks before it goes flat (based on typical
usage patterns for the PC).

It's possible the CMOS checksum is bad, because
the PC actually crashed at some point. Which is
just as likely a root cause, as a bad battery.

This is an example of a "1067A" era processor.
It's a 45nm Core2 (same era as the machine I'm
typing this on). And it's not like a Dell
to go cranking BCLK off the normal values,
overclocking it, and making it crash.

http://www.cpu-world.com/CPUs/Pentium_Dual-Core/Intel-Pentium%20Dual-Core%20E6300%20AT80571AH0722ML.html

So I can't guess why it's unhappy. And since you
hear a fan, it's also not like the CPU isn't
getting cooling, and crashed when overheated.

You do want to:

1) Unplug the computer.
2) Open the Dell side panel.
3) Examine the combo cooler
assembly, to see if it is
full of dust or clogged.
4) When cleaning around fan blades,
be careful to not overstress the fan bearing.
I broke a fan here, cleaning dust from it one
day. It was one of those spring-loaded fan
bearings.

HTH,
Paul

MrTsquare

2015-03-12 04:09:09 UTC

Permalink

Post by Paul

That one is interesting.
On a Dell, the fan could go crazy, if the CPU crashes and
the hardware uses defaults. The fan becomes a
vacuum cleaner on a Dell, if say, you unplug the
CPU ATX12V power cable.
Another possible source of vacuum cleaner noises,
is an expensive video card. There is one kind
of malware that uses ATI video cards to
compute Bitcoins. This makes the video card hot
and cranks up the fan. But that would start after
the OS loads.
Vanguard suggests replacing the CMOS battery.
Which is one possibility. You can take a voltage
reading off the top of the battery, with a multimeter,
using an I/O screw as a ground connection. Voltage
should be between 2.3V and 3.0V+. If the battery
is significantly below 3.0V, you likely have about
three weeks before it goes flat (based on typical
usage patterns for the PC).
It's possible the CMOS checksum is bad, because
the PC actually crashed at some point. Which is
just as likely a root cause, as a bad battery.
This is an example of a "1067A" era processor.
It's a 45nm Core2 (same era as the machine I'm
typing this on). And it's not like a Dell
to go cranking BCLK off the normal values,
overclocking it, and making it crash.
http://www.cpu-world.com/CPUs/Pentium_Dual-Core/Intel-Pentium%20Dual-Core%20E6300%20AT80571AH0722ML.html

Had a Dell 486 back in 2009 that did this. Surely wish I had at least
this guidance back then. Dell support was no help at all. Poor thing
is now in Dell heaven.

T2

Mr Pounder

2015-03-12 20:11:30 UTC

Permalink

Post by Paul

That one is interesting.
On a Dell, the fan could go crazy, if the CPU crashes and
the hardware uses defaults. The fan becomes a
vacuum cleaner on a Dell, if say, you unplug the
CPU ATX12V power cable.
Another possible source of vacuum cleaner noises,
is an expensive video card. There is one kind
of malware that uses ATI video cards to
compute Bitcoins. This makes the video card hot
and cranks up the fan. But that would start after
the OS loads.
Vanguard suggests replacing the CMOS battery.
Which is one possibility. You can take a voltage
reading off the top of the battery, with a multimeter,
using an I/O screw as a ground connection. Voltage
should be between 2.3V and 3.0V+. If the battery
is significantly below 3.0V, you likely have about
three weeks before it goes flat (based on typical
usage patterns for the PC).
It's possible the CMOS checksum is bad, because
the PC actually crashed at some point. Which is
just as likely a root cause, as a bad battery.
This is an example of a "1067A" era processor.
It's a 45nm Core2 (same era as the machine I'm
typing this on). And it's not like a Dell
to go cranking BCLK off the normal values,
overclocking it, and making it crash.
http://www.cpu-world.com/CPUs/Pentium_Dual-Core/Intel-Pentium%20Dual-Core%20E6300%20AT80571AH0722ML.html
So I can't guess why it's unhappy. And since you
hear a fan, it's also not like the CPU isn't
getting cooling, and crashed when overheated.
1) Unplug the computer.
2) Open the Dell side panel.
3) Examine the combo cooler
assembly, to see if it is
full of dust or clogged.
4) When cleaning around fan blades,
be careful to not overstress the fan bearing.
I broke a fan here, cleaning dust from it one
day. It was one of those spring-loaded fan
bearings.
+ 1

I do this every 6 months and this machine is now pushing 8 years old.

NOBODY

2015-03-12 01:57:13 UTC

Permalink

Open the box.
Take the fan off the CPU if you can.
Clean the heatsink. It is full of crap.
I have a vacuum cleaner tip kit that will get into tiny places.
Harbor Freight and others have this kind of kit.

I have had the same thing happen and all it took was to clean the crap
out of the heatsink sitting between the fan and cpu chip.

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Art Todesco

2015-03-12 12:59:12 UTC

Permalink

Post by NOBODY
Open the box.
Take the fan off the CPU if you can.
Clean the heatsink. It is full of crap.
I have a vacuum cleaner tip kit that will get into tiny places.
Harbor Freight and others have this kind of kit.
I have had the same thing happen and all it took was to clean the crap
out of the heatsink sitting between the fan and cpu chip.

+1 to this. My fan suddenly started going faster about 3 weeks ago and
I found dirt matted in between the heat sink fins. I was able to us a
fairly powerful vacuum by the fan and it was able to suck out the stuff.
It also made the fan spin like a jet engine. But, as suggested, you
might have to remove the fan.

G. Morgan

2015-03-12 10:45:28 UTC

Permalink

I would check the inside of the case for dust on the fans, then blow it out if
present.

Next, reset BIOS to defaults if that is not the culprit.

Then, lay down new thermal compound on the CPU/heat sink.

scbs29

2015-03-12 14:28:54 UTC

Permalink

Hello all When I switched on my pc this morning I was greeted by a black
Stepping A CPUID 0001067A Cache L1 Size 644 Kb Cache L2 Size 2048 Kb
Press F12 for BBS popup The machine is operating with DDR2 800 Dual
channel mode 6144 Mb OK CMOS checksum bad Press Del to run Setup Press
F1 to continue
Pressinhg Del showed nothing untoward and pressing F1 booted into
Windows 7 with no problem.
This happened a couple of times and then 'went away' and the pc now
boots up as usual with no error messages.
Since the above occurred, however, when switching on, the CPU fan runs
as usual, nearly silently, then it speeds up and gets much noisier. No
mechanical noise to suggest bearings, just the noise of air being moved
by the fan and the fan turning faster.
Tj. Max 100 Core Temp Min Temp Max temp Load 0

36 31

45 2%
1 28 24 32 2%
2 37 37 40 2-83%
3 36 32 40 2%
So I assume that the problem is not temperature related.
The time and date on the pc are correct.
Following advice I cleaned out the inside of the pc with compressed air.
There was hardly any dust in the case, in fact I could not see any at
all when I used the compressed air.
This made no difference.
There have been no changes to the software or hardware since I shut down
last night.
Can anyone advise ?
If there is a newsgroup more suited to this type of problem I would be
grateful to be pointed in that direction.
DDR2 RAM NVIDIA GeForce GT 220, 1Gbyte RAM Windows 7 Pro, 64-bit

Oops, sorry for multiple post, dont know what happened.

scbs29

2015-03-16 19:00:34 UTC

Permalink

Post by scbs29

snip

Post by scbs29

DDR2 RAM NVIDIA GeForce GT 220, 1Gbyte RAM Windows 7 Pro, 64-bit

Oops, sorry for multiple post, dont know what happened.

Thanks for all the replies.
Pc packed up completely. As soon as I switched on I got a continuous
high pitched beep and nothing happened.
I took it to a local computer diagnosis/repair and they had a look at
it.
When they had finished I went to pick it up and they told me that they
could not find anything wrong except the BIOS date was 2009.
The CMOS battery was fine.
He cleaned and replaced the paste on the cpu but that was all that was
wrong, the inside being clean.
The cpu fan was still running at about 4000 rpm and making a lot of
noise.
Whilke I was there he reset the BIOS to default again and the fan
slowed down to its usual speed, no noise.
Since then (couple of days) everything has been fine.
He said that problems could be caused by switching off without
shutting down, and I remembered that we had a power cut while the pc
was switched on, so maybe that caused the trouble.
Think it might be worth finding out about a UPS.

--
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Registered Linux User 490858

Gene E. Bloch

2015-03-16 21:51:06 UTC

Permalink

Post by scbs29

snip

Post by scbs29

DDR2 RAM NVIDIA GeForce GT 220, 1Gbyte RAM Windows 7 Pro, 64-bit

Oops, sorry for multiple post, dont know what happened.