What was heard was a soft humming noise from the RM750x while the GPU was working hard.
What was heard was a soft humming noise from the RM750x while the GPU was working hard.
Got a brand new Corsair Rm750x (2021) power supply, and if I run something like Furmark on my GPU (RTX 4070) there is a tiny bit of coil buzz from the PSU itself. Inaudible unless I put my ear right up to the power supply exhaust. I haven't been having any problems, and it doesn't irritate me, so should I just leave it?
EDIT: And by 'buzz' I mean, a buzzing noise that kinda shifts frequency a bit and occasionally sounds more like a "whine" so I know it's not an electrical buzzing of another sort. It seems to be strongly linked to the GPU's frame rate output - Furmark has a much lower framerate and that produced low frequency buzzing, while running 3Dmark sky diver had framerates 400-500FPS+ and it was just emitting a very quiet high pitch whine, almost inaudible. The GPU itself was louder.
if it's a buzzing or a whine and changes its frequency/volume with the framerate, then it should just be Coil Whine. nothing to worry about in this case, I'd assume
while GPU's are usually the main source of whine, PSUs and even Motherboards can do it as well. since it's practically inaudible and strongly tied to the framerate, seems like it's just coil whine, which is harmless
if you're SUPER scared or SUPER annoyed, you can replace it but idk if they really RMA for coil whine; you might just get another PSU with coil whine anyway, maybe even a louder version of it
It occurs mainly when under stress, especially around certain frame rates. Furmark operates near 200 FPS, Port Royal at about 50 FPS, both strain the GPU and lead to that low-frequency hum, while Sky Diver hits 500 FPS plus with less power but no buzzing. It appears connected to how the GPU communicates with the circuit. Should you be concerned?
at a glance and with what you've described, it does appear to be coil whine; 500fps+ with no buzz and 200fps with buzz sounds weird at first but those 10w could unexpectedly cause the difference. wouldn't surprise me
I'm not familiar enough with the internals of a GPU, PSU, and how power runs through them to comment on that last part, but it seems to mostly line up with coil whine. I'd say wait for people more knowledgeable than me to come through and confirm, or ask again if you get no further replies