1 Topic by cipher0

  • cipher0
  • Banned
  • Offline
  • Registered: 2013-12-20
  • Posts: 138

Topic: find out real PSU Amps?

So my stock PSU died and I want to upgrade to a more powerful PSU.
Is there any way to test what the real amps of a power supply are before buying from a store?

2 Reply by Tin Falcon

  • Tin Falcon
  • Tin Falcon
  • Member
  • Offline
  • From: New Jersey, USA
  • Registered: 2014-08-01
  • Posts: 2,424

Re: find out real PSU Amps?

Is there any way to test what the real amps of a power supply are before buying from a store?

In a word No.
Even  if you have one in hand you can not really measure the amp rating.
Also there are a couple numbers to look at  things like generators and power supplies have a max amperage rating based on the maximum amps  for a short period time sometimes called peak amps. the other more practical number is continuous amps this is the power supply will really put out  without danger of overheating.

A power supply will only  provided the amps needed for a given load .
Not sure what you are really asking.

Soliddoodle 4 stock w glass bed------Folger Tech Prusa 2020 upgraded to and titan /aero extruder mirror bed
FT5 with titan/ E3D Aero------MP mini select w glass bed
MP Utimate maker pro-W bondtech extruder
Marlin/Repetier Host/ Slic3r and Cura

3 Reply by cor5151

  • cor5151
  • Member
  • Offline
  • Registered: 2014-05-30
  • Posts: 65

Re: find out real PSU Amps?

volt x amp = watts so a 12v psu rated at 300watts is about 25amps
look up Ohm's law for a little electrical insight