Originally Posted by friend'scatdied
Antec PSUs may be good now, but they weren't in the past.
If it's a Smartpower (possible also Smartpower 2.0), Truepower or Truepower 2.0 you will need to replace it. Those PSUs had a design flaw which resulted in capacitors overheating and degradation over time. With the age of the PSU, I would not take the risk.
More info if you're curious:
Antec's Smartpower and Truepower PSU lines used capacitors that weren't rated very well for heat tolerance. They made a stupid decision to limit fan speeds to keep the PSU quiet. Over time, the capacitors in these PSUs will degrade at an accelerated rate and eventually result in premature failure.
Huge difference between a well-designed, new 450W PSU (like the guy with the Corsair above) and an old, poorly-engineered PSU.
Yes and no, you need to realize that the Truepower/2.0 and Smartpower/2.0 are 2004/2005 PSUs, relics from the era of high output 5v/3.3v rails... for example, a True480 had a 12v rating of 20A(240W) and it was considered a proper 480W power supply(those were the standards and the requirements), by today standards that would be a 300W unit(at most), because the focus shifted onto the 12v rail(with power hungry CPUs and GPUs).. these PSUs ended up being used in system requiring a completely different power distribution(rail wise) and subsequently failed... incidentally they were all made by the same OEM who makes all the Corsair units listed above, and that is CWT
Capacitors don't degrade like drifting tires, high quality capacitors don't degrade to any noticeable extent unless you intentionally bake them.