I have a Cooler Master GX 750W 80+ Bronze power supply that is roughly 15 years old. It was handed down from a family business, and I've personally used it for the last 5–6 years without any real problems, aside from the power switch being stuck in the on position. Earlier this year I built a new system with a Ryzen 5 7600X and a Radeon 9060 XT, replacing everything except the case and PSU. Is it reasonably safe to keep using this power supply until it fails? If it does fail, is this model reliable enough to protect the rest of the system, or could it damage the newer components?
4 Answers
I wouldn’t treat this as an urgent emergency if the computer is currently stable, but I would plan to replace it soon. The unit is far beyond its likely warranty period, and 80+ Bronze by itself doesn’t indicate high build quality or strong protection. A current, reputable 700–850W model is cheap insurance.
A PSU failure can be harmless, but it can also damage a motherboard, graphics card, drives, or memory. Protective circuitry reduces the risk; it doesn’t eliminate it. Age-related capacitor wear also means the original power ratings and voltage stability may no longer be what they were, so I wouldn’t use this unit with a new build indefinitely.
It may continue working, and an old PSU doesn’t automatically mean it will fail catastrophically. However, there’s no reliable way to know whether its aging components can handle modern systems and rapid CPU/GPU power changes. Since the rest of your hardware is much more valuable than a replacement PSU, I’d replace it rather than deliberately run it until failure.
The fact that some very old power supplies are still running doesn’t make continued use a safe bet. Some units fail quietly, while others can take connected components with them. Replacing it now avoids risking an expensive new system to save the cost of a modern quality PSU.
A PSU tester can help identify an obvious voltage problem, but passing a basic tester doesn’t prove the unit is healthy under load or that its protections still work. It’s useful as a quick check, not a reason to keep a 15-year-old PSU permanently.