Is My CPU Overloaded? Possible Causes and Solutions for Crackling Noise

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Discussion Overview

The discussion revolves around the potential causes of a crackling noise heard from a computer system when the CPU is under heavy load. Participants explore various hypotheses related to hardware components, including the CPU, fans, and hard drives, while considering the implications of insufficient power supply wattage.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant notes that the crackling noise occurs when the system is overloaded and questions if it relates to having an insufficient wattage power supply.
  • Another suggests using Speedfan to monitor temperatures, indicating that high temperatures could be problematic.
  • Some participants argue that semiconductors do not produce noise unless they fail, casting doubt on the CPU being the source of the noise.
  • Several participants propose that the noise could be due to failing fan bearings, especially as the CPU workload increases.
  • One participant shares an experience of a hard drive making scratchy sounds due to heavy data load, suggesting that the noise might originate from the hard drive under similar conditions.
  • Another mentions that a thrashing hard drive can sound like crackling but does not necessarily indicate a malfunction.
  • Some participants discuss the possibility of other components, such as induction coils or capacitors in the power supply, contributing to the noise.
  • One participant expresses concern that the crackling sound may indicate an impending failure of the hard drive, based on personal experience with similar symptoms.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the source of the crackling noise, with multiple competing views regarding whether it originates from the CPU, fan, hard drive, or other components. The discussion remains unresolved.

Contextual Notes

Some participants mention the importance of monitoring temperatures and system health, while others highlight the potential for noise from various hardware components without definitive conclusions on the cause.

Who May Find This Useful

This discussion may be useful for individuals experiencing similar symptoms with their computer systems, particularly those interested in hardware troubleshooting and diagnostics.

ank_gl
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BURNING cpu??

since last 2-3 days, whenever my system gets overloaded(not just overloaded, even any process popping up in between some other one), i hear some crackling noise over my processor. is something wrong in there??
i know i don't have enough wattage SMPS, is it related something to this?? i have a 400 watt smps, whereas smps for a core2duo processor shoud be atleast 500 watts.
but then again, i never had this crackling noise ever earlier
 
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SMPS?

Download Speedfan and check. Anything over 60C and you're in trouble.
 
Semiconductors don't make any noise until they explode. I know of no physical mechanism that could cause a semiconductor to make a "crackling" sound, so I doubt the crackling noise you're hearing has anything to do with your processor.

- Warren
 
The bearings in your fan could have gone however.
 
Kurdt said:
The bearings in your fan could have gone however.

Quite true. In fact, as your CPU does more work (and produces more heat), your system health monitor may be slightly increasing the fan speed. At some critical speed, something is either resonating with the air flow, or a bearing is showing its age. This is much more likely than a mysterious CPU crackling.

- Warren
 
Kurdt said:
The bearings in your fan could have gone however.

x2. Sounds like a fan to me. ank_gl, open up the case and with it running, see if the noise stops when you press on the cpu fan with your finger.
 
B. Elliott said:
x2. Sounds like a fan to me. ank_gl, open up the case and with it running, see if the noise stops when you press on the cpu fan with your finger.

That way you'll make sure that the problem is the fan. I think just listening with the case off is sufficient to diagnose that problem.
 
i did monitor the speed fan and the core temperature in BIOS. they are normal, being about 3500-4000rpm and 38C-45C. the heat sink is working fine. the sound comes only when the cpu is under heavy attack ie many many processes. i just said its CPU, but i am not sure of it, it might be from the hard disk

and sorry for a lil late update

the sound is NOT continuous, it only shows up at high CPU usage

The bearings in your fan could have gone however.
nup, i know how it sounds when the fan goes out, one of my friend had his gpu fan(video card heat sink) making those weird sounds
 
Last edited:
  • #10
A little over a year ago i had a 40GB hard drive, that got overloaded with corrrupted data (virus or trojan) i think. The free memory went from about 32GB to around 9GB in a short time, it seemed that the voice coils were activating the read/write heads so fast, that a scratchy sound was being emitted from the hard drive. I never resolved the problem, and finally replaced the drive with a new one.
 
  • #11
Well, a thrashing hard drive can certainly sound like "crackling" or "scratching," but it doesn't mean anything's wrong with your computer (at all).

- Warren
 
  • #12
If it's the hard drive, maybe you need to defrag your drive.
Does the drive have a S.M.A.R.T. feature?

The link I posted above makes reference to the thermal grease interface to the heat sink.
 
  • #13
Kurdt said:
The bearings in your fan could have gone however.

Very possible, i recommend he replace it and apply a fresh coat of Arctic thermal 5
 
  • #14
Could be an induction coil. Do you see any that aren't covered in epoxy? When you hear the whine you could try gently pressing on the coil with a pencil eraser. My video card actually emits a slight whine when the gpu is fully loaded... it's due to an induction coil. The noise just isn't loud enough to bother correcting, that and it isn't damaging.
 
  • #15
Could also be a bad capacitor in the PSU, the extra draw from the CPU under load causing the cap to whine.
 
  • #16
Reply to: "Crackling" sound.

Hi,

This is absolutely a HDD that soon will stop to work. It fit with that you hear the sound when the computer perform heavy workloads.

The "crackling" sound do come from the HDD, i recognice this as exactly the same symptom i have had several times myself on computer thast begin to be old, or on computers that stayed on for 24hrs., run for yrs.

When a HDD are near its lifespan, it starts like a crackling sound, and after some time suddenly starts to sound like a "dentists gear".

I can ofcource not be sure without actually inspecting your computer "in the field", but i am pretty sure you should prepare for HDD change.

thj
 

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