I upgraded my PC's power supply and accidentally used the old wall-to-PSU cable for the first boot before swapping it out. I move the computer between my desk and TV setup, so I'd like to leave a power cable at each location for easier setup and cable management. Is it safe to reuse the old external power cord with the new PSU?
3 Answers
Never assume that the modular cables inside the case can be reused. PSU-side pinouts can differ between models, even within the same brand, and using an incompatible cable can damage the motherboard, drives, or other components. Only reuse internal cables when the manufacturer explicitly confirms compatibility.
The external cable is safe to reuse because it doesn’t contain the PSU’s custom wiring or power-management circuitry. The important distinction is that this only applies to the cord running from the wall to the PSU.
Yes. The basic wall-to-power-supply cord uses a standardized connector, commonly an IEC C13 cable, so you can keep one at each setup. Just make sure the cord is undamaged and rated for the current your PSU requires; a normal, properly rated PC power cord is usually fine.
Some models do share compatible pinouts, but unless you have the manufacturer’s compatibility information, it’s safest not to mix internal PSU cables just because the connectors fit.