• Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!

Power Supply Makes a Buzzing Noise on Load?

Overclockers is supported by our readers. When you click a link to make a purchase, we may earn a commission. Learn More.


Jan 12, 2013
Colorado Springs, CO, USA, Earth
I don't know how long it's been doing this, but just recently I noticed my power supply emits sort of a buzzing noise when I game, when the graphics happen (like clockwork, for example, when I play StarCraft II, when I'm on the animated menu, it buzzes. But as soon as a loading screen appears, the buzzing stops. And then when it's done loading and the game begins and the graphics are present, the buzzing begins again). I don't know if it sounds more like a vibrating noise, or a static-like noise, I'm not really sure what it is but it could be either or. It is a Corsair CX Series CX750M 750w. Any ideas or if this is cause of concern at all? Thanks.

OS - Windows 7 Ultimate 64-bit
Chassis - CoolerMaster MasterCase MC500
Motherboard - Asus Maximus VI Hero
Processor - Intel i7 4771 @ 3.5GHz (Quad-Core)
Memory - 32GB DDR3 @ 1600MHz
Video - NVIDIA GeForce RTX 2060 Super
Storage - 1x OCZ 128GB SSD (OS Installed), 1x WD 500GB SSD, 2x Seagate SATA 1TB HDD @ 7,200rpm, 2.628 TB Total
Power Supply - Corsair CX Series CX750M 750w
WiFi - Intel Dual Band 7265 802.11ac
Heatsink - Cooler Master Hyper 212 EVO w/ Pull Fan


Gulper Nozzle Co-Owner
Dec 15, 2008
Yeah.. not much you can do about it. Grab a new one and use that as a known good reserve.


Oct 28, 2017
If I may also with a questn...when overclocking harder, I run cinebench r20 and hear a pump starting to slow down when bench begins and then computer turns off.

X58 era system retrofitted with hexa xeon.
750w psi
Asus p6t del v1
3 hard drives(2hdd, 1ssd)
Single fan AIO

The slow dwn is not like brrrr....d, but you hear a tone change when benchmark starts crunching. I'm also getting almost limited on temps as well at that point.

Do I need 1000watt psi? Or is it more motherboard limited?
(do I need new computer?)


Oct 28, 2017
Oh yeah, it pegs the limit during stressing way before voltage becomes a problem, but on short benches I like to pump a little extra and then power goes poff, and like someone pulled the plug. Usually 4.4ghz or 1.49vcore, whichever comes first. Fans start to dim and couple seconds later it happens.