Possible Power Supply Blown Out... Any suggestions?

[dannycodos]

I've had a 4 GPU rig running for a few weeks now with 1 1070, 2 980 Ti's, and 1 1060 6GB. Motherboard is Asus Prime Z270P and PSU is a 1200 Watt Thermaltake. Yesterday I managed to get my hands on a new 1070 and set it up, and all seemed to be working well for a matter of hours.

This morning, I woke up to the smell of burning plastic and seemingly none of the GPUs or risers receiving power, but the motherboard and SSD were still being powered properly. I immediately unplugged it to inspect but couldn't find any damaged/burned wires or figure out where the smell was coming from.

To troubleshoot I used one of my risers that lights up when powered and when using the same cord I found that two of the peripheral slots from the PSU are not working, but all of the others are. I tried to power it back on using the other ports to the risers, and this time at least the LEDs on the GPUs came on, but they were not recognized once booting up.

This all leads me to believe that the PSU is partially dead (the 2 peripheral ports and the PCI ports), but I didn't realize that it was possible for a PSU to partially die like this, especially a new high quality one. I figured they had circuits that prevented this, but given the PSU is under a month old, if this is the issue I could probably get a warranty replacement.

I have ordered a PSU tester to check these assumptions but is there anything I could be missing or additional steps to take?

 

[Lutfij]

The best course of action is to see if the entire system with your existing specs apart from the PSU works when you feed it power from a similarly wattage unit(of reliable build quality). You forgot to mention the model of the TT PSU. They have been undergoing some QC issues in my experience.

 

[dannycodos]

The best course of action is to see if the entire system with your existing specs apart from the PSU works when you feed it power from a similarly wattage unit(of reliable build quality). You forgot to mention the model of the TT PSU. They have been undergoing some QC issues in my experience.

Thanks for the reply. The model is PS-TPD-1200MPCGUS-1. It's the Toughpower 80+ Gold Semi-modular one.

I was mostly just curious if it was really possible for a power supply to die in this way, with certain components still working. If this was caused by an overload, shouldn't the power supply just shut down instead of killing itself? Or was it more likely just a defective part inside of the PSU that caused a short under high load?

Also, I don't currently have access to another PSU or I would test it that way.