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Corsair RMX 650W (2021) ticking sound issue

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Hello, experiencing weird sound with new Corsair RMX 650W (2021). This is a model with Zero RPM mode and magnetic levitation fan. Video with sound:





What is that ticking sound? Like something constantly switching, or popping. This sound only happens when system is in idle state after some workload, for example, Cinebench benchmark. It never happens when load is applied. The system also needs to be running for some time. Weirdly enough, if I put a slow spinning case fan to keep the PSU cool at idle, the ticking still happens, but it is silent ticking instead. Seems like heat is one of the variables. The PSU also produces some regular coil whine.


Another niuance is that system isn't grounded. Maybe the static buildup is one of the variables. I live in apartment building in Eastern Europe and most buildings are old. Most don't have grounded sockets. The apartment I live in doesn't have a single grounded socket and there is no wiring either. I don't own this apartment so I cannot do anything about it.


Full system:

PSU: Corsair RMX 650W (2021)

Motherboard: Asrock B550M Pro4

CPU: AMD 5600X

GPU: AMD RX 580 8GB Sapphire Nitro+

RAM: Kingston 32GB (16x2) 3200Mhz

Storage: NVME SSD

4 Fans (3 Case, 1 CPU)


Older system with Cooler Master GM 550W PSU run at the same place for 3 years with no issues. I also put that 5.5 year old PSU in new system and it ran without issues.


This is not a lack of power issue. When I put a load on this system the PSU fan still doesn't spin. It doesn't spin until 260W load, means I'm below that. The idle power consumption is also fairly low.


What could cause such sound effects? Should I be worried? I'm still in 14 day return window, though because the device is already used it might be more problematic tu return it.



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Having an old electrical system is a problem for many around the world


check to be sure the CPU fan is clear


get some zip-ties to secure loose wiring.


I could not hear anything on your video clip

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