Solved strange noise from PC

jds63

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About 2 days ago i opened PC case to do my regular maintenance of dusting inside. Usually use Compressed air.

Have 2 case fans (1) 92mm (1) 80mm plus the CPU Cooler fan, my Graphics card has dual fans.

Just other day and this only happens when i am booting the PC, i hear what sounds like and what i can only describe as a horn sound as the fans speed up at boot , then it goes away as fans slow when i reach the sign on page. After i do not hear any noises from them at all.

As usual i know my graphics card fan speeds up when i boot the PC this is normal i know. This issue does not happen every time, it's occasional since day i dusted it out. Weird part is when i opened it to inspect the possible cause i reboot number of times and nothing happens with case open, thinking possible vibration. When i put case cover back on did not do it after a couple of attempts, but eventually did, not every time though.

Wondering if a case fan, PSU fan, or Graphics card is going because it's not every time, like 1 or 2 out of 10 times i reboot to try it. With cover off it never happened, could it be air flow difference with cover off, a possible vibration but i can not figure it out if i do not remove cover then.

Kind of stumped, don't see anything possibly loose or could be hitting something inside case.
Also tried stressing the Graphics card with program called Valley Benchmark to see if card whined, but it handled this good.
Not sure what else to think, unless compressed air caused some kind of issues.
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
Could have something stuck inside one of the fans around the fan shroud, only rubbing at high speed.
 

My Computer

System One

  • OS
    Windows 8.1 Pro 64-bit
    Computer type
    Laptop
    System Manufacturer/Model
    Acer V3 771G-6443
    CPU
    i5-3230m
    Motherboard
    Acer VA70_HC (U3E1)
    Memory
    8GB DDR3 PC3-12800 (800 MHz)
    Graphics Card(s)
    HD4000 + GeForce GT 730M
    Sound Card
    Realtek High Definition Audio
    Monitor(s) Displays
    17" Generic PnP Display on Intel HD Graphics 4000
    Screen Resolution
    1600x900 pixels
    Hard Drives
    Samsung SSD 850 EVO 250 GB
    ADATA SSD SP900 128GB
    PSU
    90 watt brick
    Mouse
    Bluetooth
    Antivirus
    Comodo
    Other Info
    Asus RT-AC56R dual-band WRT router (Merlin firmware). Intel 7260.HMWWB.R dual-band ac wireless adapter.
^Yea, since we're not there, best advice would be to thoroughly check the fans, making sure they are very clean, especially where the blade is nearest to another surface. Failing that, you may need to dismantle the fan to be able to get closer to the problem, provided it is able to be taken apart.

Sometimes you can listen to which fan it is exactly, or CAREFULLY stopping each fan in turn manually until you discover the source. Unless it isn't a fan at all and I missed something. :)
 

My Computer

System One

  • OS
    Windows 8.1 Pro with Media Center x64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Custom
    CPU
    Intel Core i7-3820 CPU OC @ 3.80GHz
    Motherboard
    Gigabyte G1.Assassin2
    Memory
    Corsair Dominator 16GB Quad Channel DDR3
    Graphics Card(s)
    Nvidia by EVGA - GeForce GTX 670 4GB
    Sound Card
    On board Creative SB X-Fi
    Monitor(s) Displays
    acer 24" H243H
    Screen Resolution
    1920 X 1080
    Hard Drives
    Main 500GB Hybrid Drive @ 7,200RPM
    Secondary OCZ SSD Vertex 3 Max IOPS
    PSU
    Silent Pro 1000w gold 80+
    Case
    Azza Hurrican 2000
    Cooling
    Liquid CPU cooler & fans
    Keyboard
    Microsoft Comfort Curve 2000
    Mouse
    Tek Republic Wired Laser Mouse
    Internet Speed
    5ms Ping 5.15Mb/s Download .64Mb/s Upload
    Browser
    Internet Explorer
    Antivirus
    Defender, Malwarebytes
Thanks guys, so far i am here in front of it open. Tried disconnecting one at a time (2) Noctua case fans i have, since they are in there with rubber connectors do not want to pull them out, but seems noise was still there even when they were not connected.

My other fan with cooler is another option to try. Possible sounds like may be coming from PSU. Heard sometimes this can come from a Optical drive really hard to pinpoint because it does not happen every time, weird part is only with case cover on.

Since recently dusted it out i will try more, but still can not find source since does not last long only when booting up then stops.
Rather frustrating, could even be Video card fan, but noise seems higher more near PSU, Optical drive or CPU fan. Which try next,CPU Fan. ty
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
Well i disconnected optical drive, thought might of still heard slight noise kind sounds like horn then slows down.
Screwed me up disconnecting optical drive as messed up boot process had to go into the BIOS to fix, :eek: o.k. now.

Frustration because not always happening we know intermittent problem is very hard to find.
Well dusted even more, especially the PSU fan, rebooted several times now, no sound. Sometimes said if it's a fan when bearing possibly warm maybe get worse or other way around, have not noticed a time when this happens certainly not at first start of the day when cool, seems after a restart.

Well keep on it, thinking PSU or CPU fan, but had CPU Fan go on me once,but it always made noise. See if extra dusting helped, but always dusted it never had this happen, usually careful how i do it.
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
Update: After trying more with this issue, not really able to disconnect CPU Fan to try for issue as i get error from BIOS stating CPU fan error won't boot up, just disconnecting CPU Fan when running would be option except this noise is not there when system is running only on reboot, would not be any help.

Might believe now could be the Graphics card i removed it and restarted several times with no noises. What happens with this card is when booting up or restarting the Video cards fans speed up very fast, then slow as boot process finishes, a pre-boot test of this card and is natural to do this as it boots. Most likely where the sound is coming from even though kind of hard to pinpoint as sometimes sounds are.

As said before this graphics card was put under some stress showed nothing, handled well, no odd noises or overheating.
Unless the PSU still issue along with card, PSU is 600W cards recommended power is 500W, but in general doesn't even use it. Enough on +12v rail 46a.
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
Some motherboards sound the on board speaker alarm for over temperature of the CPU. Which in fact sounds like an alarm horn. I have seen some motherboards that will sound this alarm intermittently when the machine is booting. Annoying, but not a cause for alarm. If you can set the alarm point in the BIOS try bumping it up 5 to 10 degrees.
 

My Computer

System One

  • OS
    Windows 8
What I do when cleaning with compressed air is to block the fan(s) with a toothpick or small screw driver so the fan blades cannot spin. This reduces the chance of damaging the bearings. If they spin to fast or tilt when spinning it can damage them. One trick to find out where a sound is coming from is to put one end of a drinking straw in one ear and point the other end where you think the sound is coming from. It will muffle all the background noise around it. When you hear your suspect sound the loudest the straw will be pointing at the culprit. That may be hard to do in your case (no pun inteneded) with the side cover on. You could still point it at the power supply and case fans though from the outside. It doesn't have to be a drinking straw, any tube will do, the thinner the diameter the better though.
 

My Computer

System One

  • OS
    Windows 10 Education 64 Bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Asus
    CPU
    AMD Phenom II X4 980 Black Edition Deneb 3.7GHz
    Motherboard
    ASUS M4N68T-M V2 µATX Motherboard
    Memory
    8GB 4GBx2 Kingston PC10600 DDR3 1333 Memory
    Graphics Card(s)
    NVIDIA Geforce GT640 2 Gig DDR3 PCIe
    Sound Card
    VIA VT1708s High Definition Audio 8-channel Onboard
    Monitor(s) Displays
    22" LG E2242 1080p and 2 19" I-INC AG191D
    Screen Resolution
    1280x1024 - 1920x1080 - 1280x1024
    Hard Drives
    Crucial MX100 256 GB SSD and 500 GB WD Blue SATA
    PSU
    Thermaltake TR 620
    Case
    Power Up Black ATX Mid-Tower Case
    Cooling
    Stock heatsink fan
    Keyboard
    Logitech Wireless K350 Wave
    Mouse
    Logitech M570 Trackball and T650 TouchPad
    Internet Speed
    80 Mbps Down 30 Mbps Up
    Browser
    Internet Explorer 11
    Antivirus
    Windows Defender
    Other Info
    HP DVD1040e Lightscribe - External USB2
or CAREFULLY stopping each fan in turn manually
You don't even have to stop them, just CAREFULLY touching the center hub with your finger or wooden popsicle/glue stick to "momentarily" slow the rotation speeds will alter any sound the fan is making, thus making it easy to determine if that fan is the source of the sound.

Running a case with the side panel off is not a good idea because the side panels also serve the purpose of channeling the air flow through the case. With a side panel off, the flow is disrupted and potential hot pockets of stagnant air is possible. So if you want to run with the side panel off, I recommend blasting a desk fan in there while troubleshooting.

You need to be monitoring your temps. I use and recommend CoreTemp for newer Intel and AMD CPUs. Speedfan is popular but does not always properly match sensor to label.

Speccy (from the makers of CCleaner) will report on all your temps (if the hardware maker included sensors).
 

My Computer

System One

  • OS
    W10 Pro
    Computer type
    PC/Desktop
Thanks Alphanumeric i recall idea of stopping blades when cleaning, usually careful.Straw idea is a new one to me, but rather good idea.

@ Itaregid this is probably why i suspected the noise was not there when case panel was off, same exact thoughts i had, it disturbs the Air flow which makes perfect sense.

Problem was this sound does not happen every time as said, could be 1-2 out of 10 tries of a restart, believe this occurs when it gets warmer, meaning bearings on possible fan, never on a cold boot or restart until PC is used for awhile. Do not know if i said this before i do monitor temps and saw nothing out of ordinary, even played games that stress the card and monitored temps.

With games i will use AIDA64 Engineer combined with Rivertuner statistics so shows in game temps too.

O.k. after disconnecting each case fan and determining it wasn't them, i removed the Graphics card at that point i restarted numerous times and did not hear it, this was when PC was warmed.

Might of said this too, but this video card revs up fast at restarts or cold boot, sort of a pre test of card during boot. So when this card gets to highest speed was when i usually heard it and as it spins down.

Seems culprit most likely the card, even though handles well, performs o.k. on PC and in games.

@PCGEEK11 No do not think this is an alarm, as said do not see drastic change in temps, think would happen during stressing the CPU and card too.

TY, GUYS
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
^ GPU fans are notoriously hard to clean, sometimes.
 

My Computer

System One

  • OS
    Windows 8.1 Pro with Media Center x64
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Custom
    CPU
    Intel Core i7-3820 CPU OC @ 3.80GHz
    Motherboard
    Gigabyte G1.Assassin2
    Memory
    Corsair Dominator 16GB Quad Channel DDR3
    Graphics Card(s)
    Nvidia by EVGA - GeForce GTX 670 4GB
    Sound Card
    On board Creative SB X-Fi
    Monitor(s) Displays
    acer 24" H243H
    Screen Resolution
    1920 X 1080
    Hard Drives
    Main 500GB Hybrid Drive @ 7,200RPM
    Secondary OCZ SSD Vertex 3 Max IOPS
    PSU
    Silent Pro 1000w gold 80+
    Case
    Azza Hurrican 2000
    Cooling
    Liquid CPU cooler & fans
    Keyboard
    Microsoft Comfort Curve 2000
    Mouse
    Tek Republic Wired Laser Mouse
    Internet Speed
    5ms Ping 5.15Mb/s Download .64Mb/s Upload
    Browser
    Internet Explorer
    Antivirus
    Defender, Malwarebytes

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
i recall idea of stopping blades when cleaning, usually careful.
It is just the idea of "stopping" a fan makes me cringe. It is not really a problem with these low voltage, small DC fans - for a few seconds anyway. But from a technical standpoint, it is not a good idea to hold any motor stationary by force. Excess heat within the motor windings can go beyond specs very quickly. Never good, even in short bursts.

And of course, a CPU or GPU can overheat in less than a second, so just a short slowdown. Or the straw trick works - or a paper towel tube if you don't to stick a straw in your ear. Or if you want to get serious about do-it-yourself repairs, get a technician's stethoscope.
 

My Computer

System One

  • OS
    W10 Pro
    Computer type
    PC/Desktop
A screwdriver, preferably one with a long shaft, will work too. It's an old mechanics trick. You put the handle up against you ear and touch the other end to what you think is making the noise. The noise gets transmitted up the shaft to the handle. Putting the tip on the video cards heat sink or the power supplies case etc may help you find the culprit.
 

My Computer

System One

  • OS
    Windows 10 Education 64 Bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Asus
    CPU
    AMD Phenom II X4 980 Black Edition Deneb 3.7GHz
    Motherboard
    ASUS M4N68T-M V2 µATX Motherboard
    Memory
    8GB 4GBx2 Kingston PC10600 DDR3 1333 Memory
    Graphics Card(s)
    NVIDIA Geforce GT640 2 Gig DDR3 PCIe
    Sound Card
    VIA VT1708s High Definition Audio 8-channel Onboard
    Monitor(s) Displays
    22" LG E2242 1080p and 2 19" I-INC AG191D
    Screen Resolution
    1280x1024 - 1920x1080 - 1280x1024
    Hard Drives
    Crucial MX100 256 GB SSD and 500 GB WD Blue SATA
    PSU
    Thermaltake TR 620
    Case
    Power Up Black ATX Mid-Tower Case
    Cooling
    Stock heatsink fan
    Keyboard
    Logitech Wireless K350 Wave
    Mouse
    Logitech M570 Trackball and T650 TouchPad
    Internet Speed
    80 Mbps Down 30 Mbps Up
    Browser
    Internet Explorer 11
    Antivirus
    Windows Defender
    Other Info
    HP DVD1040e Lightscribe - External USB2
i recall idea of stopping blades when cleaning, usually careful.
It is just the idea of "stopping" a fan makes me cringe. It is not really a problem with these low voltage, small DC fans - for a few seconds anyway. But from a technical standpoint, it is not a good idea to hold any motor stationary by force. Excess heat within the motor windings can go beyond specs very quickly. Never good, even in short bursts.

And of course, a CPU or GPU can overheat in less than a second, so just a short slowdown. Or the straw trick works - or a paper towel tube if you don't to stick a straw in your ear. Or if you want to get serious about do-it-yourself repairs, get a technician's stethoscope.

Not stopping fan blades when it's running !! When i am cleaning it using compressed air on it, to let the fan turn fast itself from air, not good idea, believe that is what the others here meant too.
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
A screwdriver, preferably one with a long shaft, will work too. It's an old mechanics trick. You put the handle up against you ear and touch the other end to what you think is making the noise. The noise gets transmitted up the shaft to the handle. Putting the tip on the video cards heat sink or the power supplies case etc may help you find the culprit.

Again being an intermittent problem makes this or most tasks difficult as we all know. Pretty sure found culprit. If i am wrong, how i learn more.
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
Not stopping fan blades when it's running !! When i am cleaning it using compressed air on it, to let the fan turn fast itself from air, not good idea, believe that is what the others here meant too.

Wise decision. :)
 

My Computer

System One

  • OS
    Windows 8.1 Pro 64-bit
    Computer type
    Laptop
    System Manufacturer/Model
    Acer V3 771G-6443
    CPU
    i5-3230m
    Motherboard
    Acer VA70_HC (U3E1)
    Memory
    8GB DDR3 PC3-12800 (800 MHz)
    Graphics Card(s)
    HD4000 + GeForce GT 730M
    Sound Card
    Realtek High Definition Audio
    Monitor(s) Displays
    17" Generic PnP Display on Intel HD Graphics 4000
    Screen Resolution
    1600x900 pixels
    Hard Drives
    Samsung SSD 850 EVO 250 GB
    ADATA SSD SP900 128GB
    PSU
    90 watt brick
    Mouse
    Bluetooth
    Antivirus
    Comodo
    Other Info
    Asus RT-AC56R dual-band WRT router (Merlin firmware). Intel 7260.HMWWB.R dual-band ac wireless adapter.
Not stopping fan blades when it's running !! When i am cleaning it using compressed air on it, to let the fan turn fast itself from air, not good idea, believe that is what the others here meant too.

Wise decision. :)

I know, not my first time doing this, cleaning inside of a desktop or removing parts. Think something was misunderstood, but i appreciate any help either way.
 

My Computer

System One

  • OS
    Windows 10 Pro 64bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    CyberPowerPC Gamer Xtreme 1502 (GX1502)
    CPU
    Intel Core i7 5820K 3.30 GHZ 64 bit 6-Core Processor
    Motherboard
    Gigabyte GA-X99-UD3
    Memory
    G.Skill 16GB Quad Channel DDR4-2400MHZ
    Graphics Card(s)
    EVGA GeForce GTX 970 SSC ACX 2.0+ DDR5 4GB
    Sound Card
    Creative Sound Blaster ZxR 5.1
    Monitor(s) Displays
    ASUS PA24Q 24" Pro Art IPS LCD/LED Backlit 1920x1200
    Screen Resolution
    1920x1200 16:10
    Hard Drives
    SAMSUNG 850 EVO 250GB SATA 6Gb/s 2.5" Internal SSD,
    Crucial MX100 512GB SATA 6Gb/s 2.5" Internal SSD,
    WD WD10EZEX-00RKKA0 1TB SATA 6Gb/s 3.5 Internal HDD
    PSU
    EVGA SuperNOVA 750 G2 750W 80 Plus Gold Full Modular
    Case
    AZZA Cosmas Black Gaming Case
    Cooling
    Cool Master Hyper 212 Evo Dual 120mm, ( 2) Noctua PWM 120mm Case Fans (1) Gelid PWM 120mm Blue LED
    Keyboard
    Logitech K800 Illumiated Wireless Keyboard
    Mouse
    Logitech M570 Wireless Trackball
    Internet Speed
    84mbps /94mbps
    Browser
    Mozilla Firefox 41.0.1 / Microsoft Edge/ IE 11
    Antivirus
    Norton Security 2015
    Other Info
    Pioneer BDR-209DBK 16x Blu-Ray Burner, LG 24x Dual Layer DVD Burner,
    StarTech Front Bay 22-in-1 USB 2.0 Internal Multi Media Memory Card Reader,Logitech Z906 5.1 Speaker system
Intermittent faults are a PITA to diagnose. It almost never happens when your watching listening for it. Hopefully you found the culprit.
 

My Computer

System One

  • OS
    Windows 10 Education 64 Bit
    Computer type
    PC/Desktop
    System Manufacturer/Model
    Asus
    CPU
    AMD Phenom II X4 980 Black Edition Deneb 3.7GHz
    Motherboard
    ASUS M4N68T-M V2 µATX Motherboard
    Memory
    8GB 4GBx2 Kingston PC10600 DDR3 1333 Memory
    Graphics Card(s)
    NVIDIA Geforce GT640 2 Gig DDR3 PCIe
    Sound Card
    VIA VT1708s High Definition Audio 8-channel Onboard
    Monitor(s) Displays
    22" LG E2242 1080p and 2 19" I-INC AG191D
    Screen Resolution
    1280x1024 - 1920x1080 - 1280x1024
    Hard Drives
    Crucial MX100 256 GB SSD and 500 GB WD Blue SATA
    PSU
    Thermaltake TR 620
    Case
    Power Up Black ATX Mid-Tower Case
    Cooling
    Stock heatsink fan
    Keyboard
    Logitech Wireless K350 Wave
    Mouse
    Logitech M570 Trackball and T650 TouchPad
    Internet Speed
    80 Mbps Down 30 Mbps Up
    Browser
    Internet Explorer 11
    Antivirus
    Windows Defender
    Other Info
    HP DVD1040e Lightscribe - External USB2
Intermittent faults are a PITA to diagnose. It almost never happens when your watching listening for it. Hopefully you found the culprit.

In the military we called them gremlins.

gremlin.jpg
 

My Computer

System One

  • OS
    Windows 8.1 Pro 64-bit
    Computer type
    Laptop
    System Manufacturer/Model
    Acer V3 771G-6443
    CPU
    i5-3230m
    Motherboard
    Acer VA70_HC (U3E1)
    Memory
    8GB DDR3 PC3-12800 (800 MHz)
    Graphics Card(s)
    HD4000 + GeForce GT 730M
    Sound Card
    Realtek High Definition Audio
    Monitor(s) Displays
    17" Generic PnP Display on Intel HD Graphics 4000
    Screen Resolution
    1600x900 pixels
    Hard Drives
    Samsung SSD 850 EVO 250 GB
    ADATA SSD SP900 128GB
    PSU
    90 watt brick
    Mouse
    Bluetooth
    Antivirus
    Comodo
    Other Info
    Asus RT-AC56R dual-band WRT router (Merlin firmware). Intel 7260.HMWWB.R dual-band ac wireless adapter.
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