Strange sound from motherboard

[mikaelstaldal]

I recently bought a new custom built computer. It has an ASUS A8V-E
Deluxe motherboard and an AMD Athlon 64 3500+ CPU.

My problem is that the computer emits a strange annoying high frequency
sound. The sound seems to come from the motherboard (or CPU). It is not
from any fan, I tried to disable both fans on the motherboard, but the
sound is still there. It is not from the video adapter, I tried to
remove it (that's the only add-on card on the motherboard).

What is this sound? And how can I get rid of it?

 

[Jan Panteltje]

I recently bought a new custom built computer. It has an ASUS A8V-E
Deluxe motherboard and an AMD Athlon 64 3500+ CPU.

My problem is that the computer emits a strange annoying high frequency
sound. The sound seems to come from the motherboard (or CPU). It is not
from any fan, I tried to disable both fans on the motherboard, but the
sound is still there. It is not from the video adapter, I tried to
remove it (that's the only add-on card on the motherboard).

What is this sound? And how can I get rid of it?

Could perhaps be from the little ring core inductors in the switch mode
regulators.
Little round cores with copper windings.
Sometimes plastic spray helped...... in TVs with the same problem.

 

[GSV Three Minds in a Can]

I recently bought a new custom built computer. It has an ASUS A8V-E
Deluxe motherboard and an AMD Athlon 64 3500+ CPU.

My problem is that the computer emits a strange annoying high frequency
sound. The sound seems to come from the motherboard (or CPU). It is not
from any fan, I tried to disable both fans on the motherboard, but the
sound is still there. It is not from the video adapter, I tried to
remove it (that's the only add-on card on the motherboard).

What is this sound? And how can I get rid of it?

It's usually/often the toroidal (donut shaped) ferrite cores in the
VCore generation circuitry (usually just towards the back of the case
from the CPU) buzzing, especially if it varies in pitch or volume with
the load on the CPU. They have some (thickish) Copper wire looped round
them, and they usually come in 4s.

Hot melt glue has been known to fix the problem, (sometimes just poking
things does the job, or moving the copper wires slightly) but if you
paid good money for this system, and it's under some sort of warranty,
then get the system builder to fix it for you, rather than messing with
it yourself.

See:
http://www.motherboardpoint.com/t22821-a7n8xe-deluxe-high-pitched-noise.h
tml

fwiw my A8N32SLI doesn't do it (but it has 8 phase VCore generation,
instead of the usual 4 (or sometimes even less).