Came around on using modern PSUs in retro cases after a buddy showed me his fire hazard

I used to be dead set on gutting old power supplies and putting new guts inside them for sleeper builds. Thought it was the only way to keep that authentic look. Then my buddy Mike showed me his old Compaq tower last week. He had this ancient 250 watt unit in there powering a Ryzen 7 and an RTX. The plastic around the 24 pin connector was all browned and one of the caps on the secondary side was bulging. He said he smelled ozone for a week before he caught it. That got me thinking about how these old PSUs weren't made for modern loads or any kind of safety standards. Now I just hide a modern gold rated unit in the bottom and run extensions. Nobody sees it anyway once the side panel is on. Has anyone else had a close call trying to reuse an old power supply?

2 comments

2 Comments

henry_kelly542d ago

Boy, that's exactly the kind of wake up call too many of us need to see firsthand. I read a piece not too long ago from an electrical engineer who tore down old PSUs from the 90s and early 2000s for a living, and he explained how the capacitors back then were only rated for maybe 1,000 hours at high temps, compared to 10,000 or more on modern units. He also mentioned that the cheap transient filtering they used basically stops working after a decade, leaving your whole system unprotected from surges. That brown plastic on your buddy's 24 pin connector is the classic sign of high resistance from a bad connection, which can start a fire real quick. I think a lot of folks forget that even if an old PSU powers on and runs, it's been cooking its guts for twenty years and is basically a ticking time bomb. You made the right call hiding a modern unit, that's what I do now with my old beige tower and it's been running cool and quiet for three years.

troy9962d ago

Honestly I was the same way, I thought I was being clever by keeping the old shell and swapping the guts. But after seeing that Compaq rig I realized I'd rather have a clean fire-free build than worry about looking period correct.