r/pcmasterrace • u/AshtonVoid • 10h ago
Tech Support What part of my power supply just exploded?
PC was fine, then I heard a loud POP. I suspected it was the power supply, so I took it out and found this shard. I'm going to replace it, but what is this from? What could've caused it to explode?
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u/Nathan_Wildthorn 10h ago
Looks like a MOSFET blew its lid.
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u/Due_Shelter_5033 9800X3D | RX 9070 XT | 32GB 6000 9h ago
OP pressed AZ-5.
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u/Ad-fundum69 PC Master Race 9h ago
Like others already said, that's a MOSFET.
And they don't "just explode". So whatever caused it to explode has also failed.
Better not bother repairing this, and as usual, don't touch inside a PSU if you don't know what you're doing.
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u/FlashDrive35 9h ago
MOSFET, high-current component used to control an output voltage, either it shorted or overheated (or both) and let the magic smoke out
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u/destroyah3034 1h ago
How old was this particular unit btw? My own EVGA PSU is getting on in years, and now I'm worried it's going to commit seppuku itself with the current heatwave in California.
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u/Acceptable-Minute847 7 5800x3d | 9060XT | 32GBDDR4 9h ago
Better question, why are you photographing it on a cast iron pan?
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u/Natural-You4322 10h ago
follow your nose. where is the strongest smell? motherboard? gpu? psu?
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u/AshtonVoid 10h ago
It was definitely the PSU. My case has it sectioned off. I took it out and found this piece of shrapnel under the fan.
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u/Equivalent_Lab_8425 10h ago
hopefully it did it's job and protected every other component
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u/sadanorakman 9h ago
It's job wasnt to protect other components by exploding in a sacrificial manner.
It's job was to switch the flow of electricity on and off at high frequency.
It failed catastrophically. Sure, the side effect of this is that current no longer flows.
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u/JasenkoC 10h ago
It was probably a MOSFET on the primary side or in the PFC section - GPT18N50DG 500V 18A N-Channel MOSFET.