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PSU coil whining hard

Tech Wizard
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My PSU is making high pitched noises (whining??) when moving my mouse. If I keep the mouse still, the sound is not present. Corsair CX750M Semi-Modular. Googled it, and found several other reporting the same problem (mostly Corsair units). I have tried this unit in two different rigs, and both have the same issue with the unit whining when mouse is moving, so I've narrowed it down to the PSU unit itself. For example in BIOS it's not making this high pitch, but as soon as window is loading / some activity for the CPU, it starts doing this.

 

I have another exact copy of this PSU in another system, and that one does not whine. Why is this happening? Is there a logical explination?

 

 

EDIT: Only whines under idle. When moving mouse under full CPU load, it doesn't make the sound.

Main:  1650 v2   @ 4,6GHz   -   X79 Deluxe                -   GTX 1080 @ 2000MHz   -   24GB DDR3 @ 2400MHz / CL10

Side:   i7-4790K @ 4,5GHz   -   Maximus 7 Hero        -   GTX 1070 @ 2114MHz    -  16GB DDR3 @ 2666MHz / CL12

 

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Is this the CXM with a green label or grey label on it? The CXM PSU's are a more 'budget' option from Corsair and are typically a noisier PSU, I had a green label CXM long ago and it was a very noisy PSU, the green label units are quite poorly made as well.

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Does your PC make the same noise when you put just the CPU or just the GPU under load? And if not, do you still get the noise from mouse movement while under load?

PC: Screw day theme users, I guess ¯\_(ツ)_/¯

CPU: R9 3900X @ 4.375GHz All Core MoBo: ASRock X470 Taichi RAM: 4×8GB HyperX Fury @ 3200MHz 16-18-18-35 GPU: 2x GTX 1080TI FE @ 2088MHz Cooling: Single 60x360mm rad, dual 45x540mm external rad, Nickel Plexi EKWB blocks, Scythe Kaze Flex 140, Alphacool VPP755V3 + Watercool Heatkiller Tube 250, Aquacomputer Quadro Case: Inter-Tech 4U 4129-N PSU: Corsair RM1000x Storage: 250GB 970Evo, 1TB Seagate Barracuda  Q1 SSD Network: Mellanox ConnectX-3 10G

 

NAS:

CPU:  i7 6850K MoBo: MSI X99A SLI Plus RAM: 2×8GB GSkill Aegis @ 2666MHz GPU: GT730 Cooling: 4xNoiseblocker NB-BlackSilentFan 80mm, Supermicro 2U Passive Cooler with a 60mm Noctua fan stuck on Case: Rackmax RM-2108-660-HT 8 Bay PSU: be quiet! TFX Power 2 300W Storage: 4x2TB Seagate Ironwolf + 2x120GB SSD Network: Mellanox ConnectX-3 10G

 

VM_Host:

CPU:  i5 10600K MoBo: MSI MPG Z490 Gaming Plus RAM: 2×16GB Mushkin Redline @ 3200MHz 16-18-18-38 GPU: - Cooling: Single 30x360mm rad, Nickel Plexi EKWB CPU Block, Corsair ML120, Alphacool VPP755V3 + Watercool Heatkiller Tube 250, Aquacomputer Aquaero 5LT Case: Inter-Tech 3U 30255 PSU: Seasonic M12-II Evo 850W Storage: 512GB Patriot P300 Network: Intel Quad 1G

Laptop: Acer Travelmate B117 (absolutely low power, but 12h battery life :D)

Phone: Oneplus 2 64GB

Peripherals:

Monitor: LG 34UC79G + 27GL63T Keyboard: Corsair K63 Wireless Mouse: Logitech G603 Mousepad: Cheap-ass GMB Mouspad Headphones: AKG K7XX  Other stuff: Novation Launchpad MK2, Aune T1 USB DAC/Amp, Behringer UMC202HD + Audio Technica AT2020 Condenser Mic

Cameras:

DSLR: Canon EOS 600D (Magic Lantern OS) Action Cam: GoPro Hero 3 Silver

Mountainbike:

Frame: Banshee Legend MKIII Fork: Marzocchi 380 C2R2 Titanium Rear shock: Rock Shox Vivid Air/Coil (switched depending on how I feel) Wheels: Spank Spike Race 33 Tires: Maxxis Minion DHR2/DHF Brakes: Magura MT5 Calipers with Shimano XT Levers Deraileur: Shimano Zee, Casette reduced to 6 Speed Crankset: Truvativ Descendant + 38T FSA Chainring Wheight: 16.4kg w/o pedals

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2 minutes ago, LukeSavenije said:

just a random question, is this the gray label or the green label version?

2 minutes ago, JM21 said:

Is this the CXM with a green label or grey label on it? The CXM PSU's are a more 'budget' option from Corsair and are typically a noisier PSU, I had a green label CXM long ago and it was a very noisy PSU, the green label units are quite poorly made as well.

1231.png.a4a0eee9e42b5abc66fdd2065f447f95.png

 

Green unit. Tier 3.

 

1 minute ago, fabafaba said:

Does your PC make the same noise when you put just the CPU or just the GPU under load? And if not, do you still get the noise from mouse movement while under load?

Under full CPU load the PSU is not whining (when moving mouse). It only makes the sound under idle (when moving mouse).

Main:  1650 v2   @ 4,6GHz   -   X79 Deluxe                -   GTX 1080 @ 2000MHz   -   24GB DDR3 @ 2400MHz / CL10

Side:   i7-4790K @ 4,5GHz   -   Maximus 7 Hero        -   GTX 1070 @ 2114MHz    -  16GB DDR3 @ 2666MHz / CL12

 

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2 minutes ago, Tech Wizard said:

1231.png.a4a0eee9e42b5abc66fdd2065f447f95.png

 

Green unit. Tier 3.

 

Under full CPU load the PSU is not whining (when moving mouse). It only makes the sound under idle (when moving mouse).

that's really weird tbh. the 750's were at least better built then the lower wattage green units. I would wait for jon here. He designs these things.

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Just now, LukeSavenije said:

that's really weird tbh. the 750's were at least better built then the lower wattage green units. I would wait for jon here. He designs these things.

Thanks. The thing is, as mentioned in my post, I have a 2nd unit (exactly same), and that one doesn't whine. It's this spesific that I have plugged into my system right now. 

I'll patiently wait. Thanks again.

Main:  1650 v2   @ 4,6GHz   -   X79 Deluxe                -   GTX 1080 @ 2000MHz   -   24GB DDR3 @ 2400MHz / CL10

Side:   i7-4790K @ 4,5GHz   -   Maximus 7 Hero        -   GTX 1070 @ 2114MHz    -  16GB DDR3 @ 2666MHz / CL12

 

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1 minute ago, Tech Wizard said:

Thanks. The thing is, as mentioned in my post, I have a 2nd unit (exactly same), and that one doesn't whine. It's this spesific that I have plugged into my system right now. 

I'll patiently wait. Thanks again.

well, failure rates still exists. do those come with 5 years warrenty?

Edited by LukeSavenije
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3 minutes ago, Tech Wizard said:

Under full CPU load the PSU is not whining (when moving mouse). It only makes the sound under idle (when moving mouse).

SPLH before Jon comes: When you're moving windows around, the GPU is used. If you don't get the coil whine while you're maxing out your GPU, just do some mining to get rid of it :D

PC: Screw day theme users, I guess ¯\_(ツ)_/¯

CPU: R9 3900X @ 4.375GHz All Core MoBo: ASRock X470 Taichi RAM: 4×8GB HyperX Fury @ 3200MHz 16-18-18-35 GPU: 2x GTX 1080TI FE @ 2088MHz Cooling: Single 60x360mm rad, dual 45x540mm external rad, Nickel Plexi EKWB blocks, Scythe Kaze Flex 140, Alphacool VPP755V3 + Watercool Heatkiller Tube 250, Aquacomputer Quadro Case: Inter-Tech 4U 4129-N PSU: Corsair RM1000x Storage: 250GB 970Evo, 1TB Seagate Barracuda  Q1 SSD Network: Mellanox ConnectX-3 10G

 

NAS:

CPU:  i7 6850K MoBo: MSI X99A SLI Plus RAM: 2×8GB GSkill Aegis @ 2666MHz GPU: GT730 Cooling: 4xNoiseblocker NB-BlackSilentFan 80mm, Supermicro 2U Passive Cooler with a 60mm Noctua fan stuck on Case: Rackmax RM-2108-660-HT 8 Bay PSU: be quiet! TFX Power 2 300W Storage: 4x2TB Seagate Ironwolf + 2x120GB SSD Network: Mellanox ConnectX-3 10G

 

VM_Host:

CPU:  i5 10600K MoBo: MSI MPG Z490 Gaming Plus RAM: 2×16GB Mushkin Redline @ 3200MHz 16-18-18-38 GPU: - Cooling: Single 30x360mm rad, Nickel Plexi EKWB CPU Block, Corsair ML120, Alphacool VPP755V3 + Watercool Heatkiller Tube 250, Aquacomputer Aquaero 5LT Case: Inter-Tech 3U 30255 PSU: Seasonic M12-II Evo 850W Storage: 512GB Patriot P300 Network: Intel Quad 1G

Laptop: Acer Travelmate B117 (absolutely low power, but 12h battery life :D)

Phone: Oneplus 2 64GB

Peripherals:

Monitor: LG 34UC79G + 27GL63T Keyboard: Corsair K63 Wireless Mouse: Logitech G603 Mousepad: Cheap-ass GMB Mouspad Headphones: AKG K7XX  Other stuff: Novation Launchpad MK2, Aune T1 USB DAC/Amp, Behringer UMC202HD + Audio Technica AT2020 Condenser Mic

Cameras:

DSLR: Canon EOS 600D (Magic Lantern OS) Action Cam: GoPro Hero 3 Silver

Mountainbike:

Frame: Banshee Legend MKIII Fork: Marzocchi 380 C2R2 Titanium Rear shock: Rock Shox Vivid Air/Coil (switched depending on how I feel) Wheels: Spank Spike Race 33 Tires: Maxxis Minion DHR2/DHF Brakes: Magura MT5 Calipers with Shimano XT Levers Deraileur: Shimano Zee, Casette reduced to 6 Speed Crankset: Truvativ Descendant + 38T FSA Chainring Wheight: 16.4kg w/o pedals

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1 minute ago, LukeSavenije said:

well, failure rates still exists. do those come with 5 years warrenty?

Got this unit from pre-built I got from my job. I didn't buy this PSU.

Main:  1650 v2   @ 4,6GHz   -   X79 Deluxe                -   GTX 1080 @ 2000MHz   -   24GB DDR3 @ 2400MHz / CL10

Side:   i7-4790K @ 4,5GHz   -   Maximus 7 Hero        -   GTX 1070 @ 2114MHz    -  16GB DDR3 @ 2666MHz / CL12

 

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52 minutes ago, LukeSavenije said:

just a random question, is this the gray label or the green label version?

 

52 minutes ago, JM21 said:

Is this the CXM with a green label or grey label on it? The CXM PSU's are a more 'budget' option from Corsair and are typically a noisier PSU, I had a green label CXM long ago and it was a very noisy PSU, the green label units are quite poorly made as well.

CX750M and CX850M doesn't matter.  No change between green label and gray label.

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58 minutes ago, Tech Wizard said:

 

I have another exact copy of this PSU in another system, and that one does not whine. Why is this happening? Is there a logical explination?

 

Switch the PSUs and see if the problem follows the PSU.

 

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7 minutes ago, jonnyGURU said:

Switch the PSUs and see if the problem follows the PSU.

 

I have, and it does. The problem follows one of the units. The second one doesn't make the sound. Tested both on 3 different systems.

Main:  1650 v2   @ 4,6GHz   -   X79 Deluxe                -   GTX 1080 @ 2000MHz   -   24GB DDR3 @ 2400MHz / CL10

Side:   i7-4790K @ 4,5GHz   -   Maximus 7 Hero        -   GTX 1070 @ 2114MHz    -  16GB DDR3 @ 2666MHz / CL12

 

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2 hours ago, jonnyGURU said:

 

CX750M and CX850M doesn't matter.  No change between green label and gray label.

So it was only the 450W-650W Green label CXM units that were bad?

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Blueberry Pi  R9 3950X  Asus X470 ROG Crosshair VII Hero Wi-Fi ATX  Corsair Vengeance RGB Pro 4x16GB 3200MHz CL16  EVGA GTX 1080Ti SC Black Edition 11GB  EVGA P2 850W w/ Blue Sleeved Cables  Cryorig R1 Universal (Blue)  2x Corsair Force MP510 4TB w/ Asus Hyper m.2 V2  Corsair ML Pro Blue LED Fans  Fractal Design Meshify C TG ATX Mid Tower  

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Plotting Machine 2  R9 3950X  Asus TUF X570-Plus Wi-Fi ATX  G.Skill RipjawsV 4x16GB 3200Mhz CL16   Nvidia Quadro K600 1GB  Corsair RM 650W  Noctua NH-D15s Chormax ‖ 4x Corsair MP600 Force 1TB W/ Asus Hyper m.2 Gen4  Arctic P14 & P12 Fans  Silverstone FARA R1 ATX Mid Tower

 

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LG 75UM8070PUA 4K UHD 120Hz IPS HDR TV  Corsair K63 Cherry MX Red Special Edition Wireless  Corsair Ironclaw RGB Wireless

 

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SFF ITX Home PC  i5-7500  MSI B250I Gaming Pro Wi-Fi AC ITX  G.Skill Ripjaws V 2x8GB 2800MHz  Intel Integrated Graphics  Seasonic SSP Flex ATX 300W PSU  Cryorig C7  Velka 3 rev 1.2 SFF ITX Case (Grey)  

 

Laptop  Dell XPS13 2-in-1 7390 (2020)  i7-1065G7  32GB 3733MHz LPDDR4x  Intel Integrated Graphics  1TB NVME M.2  UHD+ (3840 x 2400) InfinityEdge Touch Display 

 

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Key Cap Collection  GMK Boba Fett  GMK Red Samurai  GMK Laser CyberDeck +Novalties  GMK Arch  MaxKey B&W  Drop MT3 Camillo ‖ Matt3o MT3 /dev/tty  KBDfans Biip Torii Ext-2048  ePBT Less But Better +Novalties  EnjoyPBT Dolch  WinMix Mustard  Drop Skylight Horizon & Slate ‖ Glorious Black Aura  

 

Mechanical Key Switch Collection  Zealios V2 65g  Zealios V2 78g ‖ Zilents V2 67g  Tealios V2 67g  C³ Kiwi ‖ C³ Tangerine  Invyr Holy Panda  Durock T1 67g  Kailh Box Thick Jades ‖ Kailh Box Royal ‖ Kailh Box Heavy Dark Yellow ‖ Kailh Box Heavy Burnt Orange  Kailh Box White  Kailh Box Red  Kailh Pro Purple  Kailh Pro Burgandy  Gateron Ink Black V2  Gateron Black  Gateron Yellow  Gateron Brown  Gateron Green  Gateron Blue ‖ Cherry MX Black ‖ Cherry MX Brown ‖ Cherry MX Red

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4 hours ago, Tech Wizard said:

I have, and it does. The problem follows one of the units. The second one doesn't make the sound. Tested both on 3 different systems.

So u have tested them so replace the bad one not expensive I just bought a EVGA 750 G3 for $65.00 but I got it on sale 

My PC:

CPU: AMD Ryzen 5 2600X Processor (4.4Ghz), MOBO: GIGABYTE X470 AORUS Gaming 7 WiFi (AMD Ryzen AM4/ X470/ Intel Wave 2 WiFi/M.2), RAM: Corsair Vengeance LPX 16GB (2x8GB) DDR4 DRAM 3000MHz C15, GPU: Gigabyte nVidia GeForce GTX 1080 Windforce OC GV-N1080WF3OC-8GD Graphics Cards, STORAGE: 120GB CRUCIAL SSD, 1TB WD BLUE, COOLER: Cooler Master 212 EVO RGB Black Edition, FANS: 4 x MasterFan MF120R RGB (2 Front, 1 Back, 1 Top), 1 x Noctua NF-P12 Redux 1700 RPM(Back off Cooler), PC CASE: Cooler Master MB500 case, PSU: EVGA 750 BQ.

 

My Kids PC:

CPU: AMD Phenom II x4 955 (95watt @3.5Ghz @1.40V), MOBO: ASUS M2A-VM, RAM: Kingston 8GB (4x2GB) DDR2 800MHz, GPU: nVidia GT 710 2GB DDR3 (OC’ed Clock to 1300Mhz and Memory to 950Mhz), STORAGE: 250GB HDD, 500GB HDD, COOLER:  Cooler Master 212 EVO, PC CASE: Cooler Master Q300L , FANS: 3 x upHere RED LED Fans (2 Front, 1 Back), PSU: Generic 300 Watt PSU.

 

Console:  PS4 - vjizzle2384

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6 hours ago, Tech Wizard said:

I have, and it does. The problem follows one of the units. The second one doesn't make the sound. Tested both on 3 different systems.

Can you RMA the PSU still? 

5 hours ago, JM21 said:

So it was only the 450W-650W Green label CXM units that were bad?

None of them were bad.  Just they gray label ones are better. 

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2 minutes ago, jonnyGURU said:

Can you RMA the PSU still? 

None of them were bad.  Just they gray label ones are better. 

Fair enough, that's what I meant by the green label ones being 'bad', the new grey label ones were better.

 

But were the 750W and 850W green label CXM units better than the lower wattage ones? I had a CX550M way back.

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6 hours ago, vjizzle2384 said:

So u have tested them so replace the bad one not expensive I just bought a EVGA 750 G3 for $65.00 but I got it on sale 

I already know that I have to replace it. I'm looking for an explanation to why this sound is happening.

4 hours ago, jonnyGURU said:

Can you RMA the PSU still? 

None of them were bad.  Just they gray label ones are better. 

No I can't. It's from a pre-built that I got from my work (I didn't buy the unit). I'm going to replace it with another unit, but I'm interested in why this is happening. Clearly it's the PSU unit making the noise, having moved it around on 3 different systems, and checking for noise from that area. It's anytime almost (99 %), except when the CPU is under full load. Happens when I play games, browse web, open software, move mouse, downloading/uploading files, reading/writing to drives etc. It feels like it happens whenever there is light/no load on the CPU. Why is this happening is my question.

 

Read something about USB and 5V rail on another forums when googling the issue. There are several forum posts on google with PSU units making this high pitched noise (mostly Corsair units as I noticed). Thanks in advance for your help Jonny.

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13 hours ago, JM21 said:

So it was only the 450W-650W Green label CXM units that were bad?

There never were green label 450-650W CXM units. The green label generation were CX430M, CX500M, and CX600M and their nonmodular counterparts. All three (six) were group regulated, and were worse than CX750/CX750M/CX850M, which use DC-DC converters.

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@LukeSavenije @JM21 @fabafaba @jonnyGURU

Here's another example of my unit screaming. Happens when I'm rewinding/fast forwarding in a YouTube video. At the end, I'm just holding the right button (fast forward) constant.

 

 

 

Main:  1650 v2   @ 4,6GHz   -   X79 Deluxe                -   GTX 1080 @ 2000MHz   -   24GB DDR3 @ 2400MHz / CL10

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well, knowing that the cx450m is only 25 bucks, the supernova g2 60 and many more, you might as well replace it if we can't find the problem

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38 minutes ago, Tech Wizard said:

@LukeSavenije @JM21 @fabafaba @jonnyGURU

Here's another example of my unit screaming. Happens when I'm rewinding/fast forwarding in a YouTube video. At the end, I'm just holding the right button (fast forward) constant.

 

 

 

Since you only want to know what it is out of morbid curiousity....

 

The input filtering has a Y capacitor that uses a mylar dielectric that's wrapped tight, taped, then covered with epoxy.  This is one looks like "unrolled":

 

blog_coil-whine-Content-7.jpg

 

Typically, the power going through these caps aren't operating at audible frequencies, but the vibrations they create can make the mylar "jitter" at an audible frequency.  This is a frequency you can hear.  The sound goes away because the frequency of the vibration changes.

 

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2 hours ago, jonnyGURU said:

Since you only want to know what it is out of morbid curiousity....

 

The input filtering has a Y capacitor that uses a mylar dielectric that's wrapped tight, taped, then covered with epoxy.  This is one looks like "unrolled":

 

 

 

Typically, the power going through these caps aren't operating at audible frequencies, but the vibrations they create can make the mylar "jitter" at an audible frequency.  This is a frequency you can hear.  The sound goes away because the frequency of the vibration changes.

 

But other than the vibrations, the unit itself is delivering clean power? Is this signs of a unit dying?

Main:  1650 v2   @ 4,6GHz   -   X79 Deluxe                -   GTX 1080 @ 2000MHz   -   24GB DDR3 @ 2400MHz / CL10

Side:   i7-4790K @ 4,5GHz   -   Maximus 7 Hero        -   GTX 1070 @ 2114MHz    -  16GB DDR3 @ 2666MHz / CL12

 

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58 minutes ago, Tech Wizard said:

But other than the vibrations, the unit itself is delivering clean power? Is this signs of a unit dying?

It's not a sign of the PSU dying.  It's just annoying.

 

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