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I used to think a bad power supply was always obvious
Had a gaming PC in the shop last week that would randomly reboot during light use, but ran fine under a stress test. I spent 3 hours swapping RAM, testing the motherboard, and checking temps before I finally plugged in a spare PSU. The old unit was putting out unstable 12v rails only under very specific, low loads. Anyone else run into a power supply that fails in a weird, sneaky way like that?
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lily_cooper5mo ago
Yeah, I read a forum post once where a guy's PC would only crash when his hard drive spun up. Took him forever to trace it back to a bad voltage on the 5v rail. Those weird failure modes are the worst.
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rayadams5mo ago
Used to brush off those stories as made up forum tales until my own rig started freezing only during video exports. Took me weeks to find a tiny voltage dip on the 12v line when the GPU kicked in. Now I believe every single one of them. Cheap parts might fail more often, but the really weird faults just need the perfect wrong setup to show up.
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morganmartinez5mo ago
Unstable 12v rails under low loads" sounds like a ghost story for techs. Lily_cooper's hard drive story is the same spooky genre, but how often does this actually happen outside of forums? Most of the time a bad PSU just dies.
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matthewmiller5mo ago
Ever wonder if those weird power supply stories are more common now because parts are just built cheaper? Feels like you hear about it all the time.
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