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Weird noise from PSU ?

Weird noise from PSU ?

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Frawky
Junior Member
33
08-09-2025, 07:56 AM
#11
Although not quite Tier-A, the Thermaltake Toughpower GT 750 looks good enough to risk for a month until the MSI is replaced. It's ATX 3.1 and PCIe Gen 5.1 compliant which is what you need for a modern Nvidia card. Just don't be surprised if you experience an occasional glitch caused by GPU current spikes, if you push both the CPU and GPU up to the limit. Might never happen. I've got far worse PSUs than the GT 750 in some machines, but most of them are ancient "office" PCs with no power hungry PCIe GPU cards inside. For my most important rigs with Nvidia cards I buy high quality PSUs. This is an example of a piece of plastic "shading" part of a PSU fan (the black near-semi circle at the top of the image). More often they're flimsy pieces of clear plastic sheet like the one below (on the left hand side of the fan with two small rectangular apertures for air to pass through). PSU manufacturers decide which components on the pcb need the most airflow and mask off sections of the fan to concentrate/direct air where it's needed most. If the plastic sheet warps and touches the fan blade, you might hear a "ticking" sound. Same applies if a stray wire is clipped by rotating fan blades, but this is a far more serious fault. If the fan blades touch a sheet of insulating plastic, so what? (provided the fan still spins freely). If the blades chop through a live wire, that's far more dangerous. These faults shouldn't happen if the PSU has been through proper QA inspection. Best to play safe unless you're a trained technician with high voltage experience or an electronics design engineer (as I am). I've designed a number of PSUs and guided them through electrical safety testing for UL and CE approval. The bulk electrolytic capacitors in my ATX PSUs sit at 340V DC (240 √2) during normal operation and can retain a hazardous high voltage charge for some time after the mains is completely disconnected. We don't want to hear you've been electrocuted at Christmas by messing around.
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Frawky
08-09-2025, 07:56 AM #11

Although not quite Tier-A, the Thermaltake Toughpower GT 750 looks good enough to risk for a month until the MSI is replaced. It's ATX 3.1 and PCIe Gen 5.1 compliant which is what you need for a modern Nvidia card. Just don't be surprised if you experience an occasional glitch caused by GPU current spikes, if you push both the CPU and GPU up to the limit. Might never happen. I've got far worse PSUs than the GT 750 in some machines, but most of them are ancient "office" PCs with no power hungry PCIe GPU cards inside. For my most important rigs with Nvidia cards I buy high quality PSUs. This is an example of a piece of plastic "shading" part of a PSU fan (the black near-semi circle at the top of the image). More often they're flimsy pieces of clear plastic sheet like the one below (on the left hand side of the fan with two small rectangular apertures for air to pass through). PSU manufacturers decide which components on the pcb need the most airflow and mask off sections of the fan to concentrate/direct air where it's needed most. If the plastic sheet warps and touches the fan blade, you might hear a "ticking" sound. Same applies if a stray wire is clipped by rotating fan blades, but this is a far more serious fault. If the fan blades touch a sheet of insulating plastic, so what? (provided the fan still spins freely). If the blades chop through a live wire, that's far more dangerous. These faults shouldn't happen if the PSU has been through proper QA inspection. Best to play safe unless you're a trained technician with high voltage experience or an electronics design engineer (as I am). I've designed a number of PSUs and guided them through electrical safety testing for UL and CE approval. The bulk electrolytic capacitors in my ATX PSUs sit at 340V DC (240 √2) during normal operation and can retain a hazardous high voltage charge for some time after the mains is completely disconnected. We don't want to hear you've been electrocuted at Christmas by messing around.

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TungTwister
Junior Member
16
08-09-2025, 01:35 PM
#12
Seems like the plastic on a second picture i guess the fans are touching it and it need to be replace. Thank you very much for your help since i order a new PSU as backup and i wait for MSI to answer my request i have more to add.
I wish you Merry Christmans and happy holydays
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TungTwister
08-09-2025, 01:35 PM #12

Seems like the plastic on a second picture i guess the fans are touching it and it need to be replace. Thank you very much for your help since i order a new PSU as backup and i wait for MSI to answer my request i have more to add.
I wish you Merry Christmans and happy holydays

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Froulard
Member
118
08-09-2025, 04:09 PM
#13
This is just a brief update.
The MSI package I received was sent back, and they advised me to contact their seller service. I had a chat with Amazon, which processed a refund after they heard about the noise.

The Thermaltake PSU looks interesting, but I’m concerned about the quality of the cables—they seem inexpensive and unrelated to MSI’s products. However, it includes a new bottom smart cool zero fan, which is similar to something I own. I’m unsure whether it should be on or off, but I’ll return it since I don’t trust it enough due to the cheap cables.

I also have a question: would you recommend any PSU around $100 that is reliable and won’t damage my PC?
F
Froulard
08-09-2025, 04:09 PM #13

This is just a brief update.
The MSI package I received was sent back, and they advised me to contact their seller service. I had a chat with Amazon, which processed a refund after they heard about the noise.

The Thermaltake PSU looks interesting, but I’m concerned about the quality of the cables—they seem inexpensive and unrelated to MSI’s products. However, it includes a new bottom smart cool zero fan, which is similar to something I own. I’m unsure whether it should be on or off, but I’ll return it since I don’t trust it enough due to the cheap cables.

I also have a question: would you recommend any PSU around $100 that is reliable and won’t damage my PC?

X
xSneik
Member
178
08-10-2025, 03:55 AM
#14
A significant number of contemporary power supplies stop the cooling fan until the internal temperature surpasses a certain limit.
In earlier models, I attached an external case fan to the PSU side to force air through the intake and out the back.
Today, I prefer PSUs with a built-in switch that maintains continuous fan operation.
Recently, I swapped my Corsair TX850M (2021 edition) for an MSI A1000G and am fully satisfied. It resolved the instability issues I faced with my RTX 3060 during power surges.
X
xSneik
08-10-2025, 03:55 AM #14

A significant number of contemporary power supplies stop the cooling fan until the internal temperature surpasses a certain limit.
In earlier models, I attached an external case fan to the PSU side to force air through the intake and out the back.
Today, I prefer PSUs with a built-in switch that maintains continuous fan operation.
Recently, I swapped my Corsair TX850M (2021 edition) for an MSI A1000G and am fully satisfied. It resolved the instability issues I faced with my RTX 3060 during power surges.

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bee200531
Junior Member
13
08-11-2025, 12:55 PM
#15
I just placed an order for a PSU tier A+ from NZXT, the C850 Gold. I expected a 750W power supply because my build requires that much power, but my GPU only outputs up to 300W. To accommodate this and ensure future upgrades, I spent an extra $20 and chose the 850W model with a maximum GPU output of 600W.
B
bee200531
08-11-2025, 12:55 PM #15

I just placed an order for a PSU tier A+ from NZXT, the C850 Gold. I expected a 750W power supply because my build requires that much power, but my GPU only outputs up to 300W. To accommodate this and ensure future upgrades, I spent an extra $20 and chose the 850W model with a maximum GPU output of 600W.

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