ATX PSU for just drives

demusss · 4 Jun 2021 at 14:59

I'd like to use an ATX power supply to just power some hard drives, so will just be using the +5v and +12v lines.

Will this cause a problem within the PSU as I won't be using any of the -ve or 3v outputs?

Thanks

Armageus · 4 Jun 2021 at 15:43

Should be fine - most modern PSUs will run with no load anyway, but even if not then 12v and 5v are normally the "main" rails which you will be loading anyway.

How are you starting the PSU?

demusss · 4 Jun 2021 at 15:46

Connecting green (ps-on) to ground, will turn on the PSU

Armageus · 4 Jun 2021 at 15:50

demusss said:
Connecting green (ps-on) to ground, will turn on the PSU

That's fine - didn't know if you were running it along side another PSU, as you can get adapters to link the 2 for example:

https://www.overclockers.co.uk/koli...r-for-combining-power-supplies-ca-033-kk.html

demusss · 4 Jun 2021 at 15:53

Interesting. Look just like a relay powered by the molex connector and probably just pulling ps-on to ground.