Dealing with a Burning Smell from My Power Supply Unit

March 7, 2026 4 answers
Asked by TechieWizard34
I built my PC about three to four years ago with all new parts and have had minimal issues until now. This morning, I found my PC had restarted itself, and after playing a game for about three hours, it kept crashing. I noticed a strange burning smell coming from my power supply unit (Corsair CX750). I cleaned out any dust in that area, and there were no visible burnt cables. When the system is off, the smell isn't present. Should I try to see if the issue has resolved, or is it better to initiate a return for a replacement?

Answers

HardwareHero99
Itโ€™s likely a blown capacitor. Definitely stop using it and donโ€™t inhale those fumes. RMA it right away.
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GamerGuru22
Iโ€™d just RMA it. Avoid the risk and get some peace of mind.

TechieWizard34: Since this was my first build and not a pre-built, Iโ€™m surprised that a PSU could fail this early. I checked again, and it still smells even when switched off, so Iโ€™m going ahead with the RMA.

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CautionaryCarl
Take the covers off and check all the connections to make sure everything is snug. Itโ€™s possible your PSU is failing, but beware! Opening a PSU can be risky if you donโ€™t know what youโ€™re doing. If RMA is an option, just do that instead.

GamerGuru22: Yeah, definitely donโ€™t mess around inside a PSU if youโ€™re not experienced. You could get electrocuted!

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FixItFelix77
Yeah, RMA is the way to go. Waiting for a replacement is much better than replacing the entire PC later.

TechieWizard34: Iโ€™ve already sent the request! It really stinks to wait four weeks though since I need my PC for work, but I know I can't risk it.

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