Boot Up Fan Noise

[Goff]

Immediately after "Post", I get very loud fan noise. The system is about a
year old using a NVidia 6600GT, AMD 3700, and there is a case fan.
Can someone tell me which fan is probably the culprit ??

 

[tpow]

Immediately after "Post", I get very loud fan noise. The system is about
a
year old using a NVidia 6600GT, AMD 3700, and there is a case fan.
Can someone tell me which fan is probably the culprit ??

I would say the graphics card fan cos at that point the video processor is
starting to work running the windows environment.

dj

 

[Jon Danniken]

Immediately after "Post", I get very loud fan noise. The system is about
a
year old using a NVidia 6600GT, AMD 3700, and there is a case fan.
Can someone tell me which fan is probably the culprit ??

Sure, give me your address, pay transprtation costs with a meal stipend, and
a minimal charge (one hour minimum), and I'll come over and find out for
you.

Alternately, you could open your box and find out yourself.

Jon

 

[GT]

Immediately after "Post", I get very loud fan noise. The system is about
a
year old using a NVidia 6600GT, AMD 3700, and there is a case fan.
Can someone tell me which fan is probably the culprit ??

Your diagnoses is probably correct - fans do tend to fail after a while. It
could be the CPU fan, the motherboard chipset fan, the graphics card fan,
the system exhaust fan, the PSU fan. No way for us to tell

Take the side or top off your case and turn on the system and have a
listen - you should easily be able to see which fan is failing. Come back to
us for more help if you need it, but basically find the broken/failing fan
and get it replaced as soon as possible - a component that needs a fan
shouldn't be run without one for very long at all, I'm talking maybe 10-20
seconds!

 

[Goff]

Your diagnoses is probably correct - fans do tend to fail after a while. It
could be the CPU fan, the motherboard chipset fan, the graphics card fan,
the system exhaust fan, the PSU fan. No way for us to tell

Take the side or top off your case and turn on the system and have a
listen - you should easily be able to see which fan is failing. Come back to
us for more help if you need it, but basically find the broken/failing fan
and get it replaced as soon as possible - a component that needs a fan
shouldn't be run without one for very long at all, I'm talking maybe 10-20
seconds!

Thanks for the quick responses. I'm not very handy and this is my primary
system. I do have "ASUS Probe" which monitors fan speeds, etc and all the
fans are working. I'll take the box in and have it fixed.

 

[GT]

Thanks for the quick responses. I'm not very handy and this is my primary
system. I do have "ASUS Probe" which monitors fan speeds, etc and all the
fans are working. I'll take the box in and have it fixed.

The noise is probably the fan spinning badly and about to fail. Don't be put
off by the unknown - opening the case does no harm to anything and when you
are in there you will see how simple things are - it looks scary at first
because you can see the motherboard, but its just like leggo - everything
fits in just one place. It will work perfectly well with the lid off the
case while you have a look. The only 2 fans that might be difficult to
change are the motherboard fan and the graphics card fan, so why not just
pop the lid off and have a look? A new fan would only set you back a few
pounds (or dollars), but taking it to a repair shop will set you back loads
as they will charge inspection fees, labour etc. etc.

 

[tpow]

The noise is probably the fan spinning badly and about to fail. Don't be
put off by the unknown - opening the case does no harm to anything and
when you are in there you will see how simple things are - it looks scary
at first because you can see the motherboard, but its just like leggo -
everything fits in just one place. It will work perfectly well with the
lid off the case while you have a look. The only 2 fans that might be
difficult to change are the motherboard fan and the graphics card fan, so
why not just pop the lid off and have a look? A new fan would only set you
back a few pounds (or dollars), but taking it to a repair shop will set
you back loads as they will charge inspection fees, labour etc. etc.

while also removing the expensive bits and dropping in cheap
bits..........TV Watchdog had a good example of this.

 

[Calab]

Immediately after "Post", I get very loud fan noise. The system is about
a
year old using a NVidia 6600GT, AMD 3700, and there is a case fan.
Can someone tell me which fan is probably the culprit ??

Just stick your finger into the fan to figure out which is causing the
noise... Just do it at the center hub of the fan and you'll be fine.

 

[Goff]

Just stick your finger into the fan to figure out which is causing the
noise... Just do it at the center hub of the fan and you'll be fine.

Much easier, and safer, to use a short rubber hose with one end by your ear
and the other near the offending part.

 

[Joel]

Thanks for the quick responses. I'm not very handy and this is my primary
system. I do have "ASUS Probe" which monitors fan speeds, etc and all the
fans are working. I'll take the box in and have it fixed.

The fan will wear out and need to be replaced every couple years (if you
run 24/7 like I do, or longer if you turn on few hrs a day), and once awhile
you may wanna use either air compressor or air-can to blow the dirt off
Power-supply and CPU fan (this can cause overheat issue), and I do this once
every few months.

 

[Strobe]

Immediately after "Post", I get very loud fan noise. The system is about a
year old using a NVidia 6600GT, AMD 3700, and there is a case fan.
Can someone tell me which fan is probably the culprit ??

My kid's system does the same thing.
He tells me it's because the driver software to throttle the fan speed is not
yet running - the sound sudenly drops a lot as Windows finishes loading.

Basically - it's normal.
Think of it as a useful confirmation that the fan is operational!

 

[Goff]

My kid's system does the same thing.
He tells me it's because the driver software to throttle the fan speed is not
yet running - the sound sudenly drops a lot as Windows finishes loading.

Basically - it's normal.
Think of it as a useful confirmation that the fan is operational!

I would agree except mine will start making the noise for a short period after
running for several hours. Boot up noise always happens, later on very
sporadic.
Assuming one or more fans are kaput, can someone recommend a high quality
brand of fans to look at ?? Oh, BTW, the case is an "Ultra"

 

[Goff]

I would agree except mine will start making the noise for a short period after
running for several hours. Boot up noise always happens, later on very
sporadic.
Assuming one or more fans are kaput, can someone recommend a high quality
brand of fans to look at ?? Oh, BTW, the case is an "Ultra"

Just an update. The system has been running for five hours and the noise just
started again. Noticed the "chassis" fan speed went from 2500 down to 1800.
Not sure if this meaningful in any way.

 

[Goff]

Just an update. The system has been running for five hours and the noise just
started again. Noticed the "chassis" fan speed went from 2500 down to 1800.
Not sure if this meaningful in any way.

It gets stranger. After ten minutes of noise, and the "chassis" fan running at
1800rpm, it moved back up to 2600rpm and the noise went away.

 

[Paul]

Just an update. The system has been running for five hours and the noise just
started again. Noticed the "chassis" fan speed went from 2500 down to 1800.
Not sure if this meaningful in any way.

Sure. If the bearing is eccentric, or sloppy, and the rotor starts to wobble, the
RPMs would drop, and you'd hear more noise from the fan.

I press on the hub (the very center of the blade), to identify a fan
that wobbles. But you have to take the side off the case, to test
all the fans.

Since you've seen the chassis fan speed drop, now all that you need
to do, is identify which fan is connected to the "chassis" fan header
on the motherboard.

If you were thinking of touching the fan power connector, while the
system is running, I wouldn't do that. If the fan wiring needs to be
modified, shut down the system and deal with the wiring changes with
the power off. The fan header is not well designed, to prevent expensive
accidents.

Paul

 

[Goff]

Sure. If the bearing is eccentric, or sloppy, and the rotor starts to wobble,
the
RPMs would drop, and you'd hear more noise from the fan.

I press on the hub (the very center of the blade), to identify a fan
that wobbles. But you have to take the side off the case, to test
all the fans.

Since you've seen the chassis fan speed drop, now all that you need
to do, is identify which fan is connected to the "chassis" fan header
on the motherboard.

If you were thinking of touching the fan power connector, while the
system is running, I wouldn't do that. If the fan wiring needs to be
modified, shut down the system and deal with the wiring changes with
the power off. The fan header is not well designed, to prevent expensive
accidents.

Paul

Thanks for the reply. I'll just replace the offending fan.

 

[John McGaw]

It gets stranger. After ten minutes of noise, and the "chassis" fan running at
1800rpm, it moved back up to 2600rpm and the noise went away.

First idea that would come to my mind based on the correlation of noise
to fan speed would be that the fan should be replaced _soon_. I've had
fans that would get into an odd vibration mode where they made a bit of
a "groan" and simultaneously slowed down (I have one starting that cycle
right now). I have had good luck with Antec fans, especially their 12cm
units but I don't know what size you might need. If the case is not too
old I would give a shot a complaining to the Ultra people. Sometimes a
few words on the phone or by email will get a sympathetic response and a
freebie even if the warranty is expired.

 

[Goff]

First idea that would come to my mind based on the correlation of noise
to fan speed would be that the fan should be replaced _soon_. I've had
fans that would get into an odd vibration mode where they made a bit of
a "groan" and simultaneously slowed down (I have one starting that cycle
right now). I have had good luck with Antec fans, especially their 12cm
units but I don't know what size you might need. If the case is not too
old I would give a shot a complaining to the Ultra people. Sometimes a
few words on the phone or by email will get a sympathetic response and a
freebie even if the warranty is expired.

I apologize for continuing this thread, but I pulled off the case side and
determined the CPU fan is making the noise. The fan is a standard "AMD" CPU
fan. Could someone recommend a quality fan that should last more than a
year? TIA for your time and trouble.

 

[Strobe]

I would agree except mine will start making the noise for a short period after
running for several hours. Boot up noise always happens, later on very
sporadic.
Assuming one or more fans are kaput, can someone recommend a high quality
brand of fans to look at ?? Oh, BTW, the case is an "Ultra"

That's different.
A good fan is switching to max speed for no obvious reason, or it's going bad.
Either way, I agree it needs fixing.
There's just a chance the noise comes from something like a loose fan shroud, of
course.

 

[John McGaw]

I apologize for continuing this thread, but I pulled off the case side and
determined the CPU fan is making the noise. The fan is a standard "AMD" CPU
fan. Could someone recommend a quality fan that should last more than a
year? TIA for your time and trouble.

I was ready to write that I could probably just give you a new unused
stock AMD heatsink and fan but upon checking my junk closet it appears
that I might have chucked it in the trash -- at least I can't locate it
at the moment. If the fan in question is one of those odd frameless
types that is buried in a stock heatsink I don't have any idea where to
buy a replacement. I invariably skip the stock units (AMD or Intel, I
don't discriminate) and install a nice copper many-finned cooler with a
larger quieter fan in the systems I make even though I don't overclock.

Good luck with it.