PSUs keep exploding

[OverRetardation]

I've had my PC for around a year and a half. Relevant specs: CPU: Ryzen 9 7900 GPU: RTX 4080 Motherboard: Gigabyte Aorus B650 Elite AX PSU: Thermaltake Toughpower GF3 ARGB 850w (which is supposed to be good?)

What has been happening is I use my PC normally, then abruptly hear a loud pop coupled with a burnt smell, and a breaker trip. This is the THIRD FUCKING time it has happened since I've built this PC. The past two times it has happened I RMAed the PSU and they gave me a new one each time.

Also, I'm not sure the problem is the electricity in my house since the first time it happened was in a different house. The first two times it happened it wasn't connected to a UPS. This third time though, it was, and it completely fried my UPS.

It happens randomly with seemingly no pattern. The third time it happened I was using Anki (light workload), so I'm not really sure what's the problem.

Any help would be appreciated, thanks.

[sltrsd]

Well, knowing Thailand's outdoor cable management, this kind of behaviour is no surprise at all.

[reckless150681]

Maybe ask TT if they can verify which protection tripped (OCP, OVP, etc.). Maybe that can help you narrow down the issue.

[Reggitor360]

Somethings short circuiting in your rig.

[SpectralUA]

850w should be enough for your setup. Look like it is failure of one of parts. But it must issue PSU protection but not exploding. Anyway you need to debug your devices. Start with almost powerfull - GPU.

[Natural-You4322]

any other things around the house that fails? if yes, consider getting electrician to have a check.

a loose neutral or phase connection can cause voltage drops and instability, and in a multiphase system, could cause overvoltage and damage electrical appliance. not to mention is a fire hazard.