Re: how can I test the voltage of my PSU?
Switching power supplies, which is what is used in computers, need to have a load for them to start regulating. The size of the load will depend on the supply. If you look at power supply ratings you will often see a minimum current rating listed. THis minimum value is what is need for the supply to start regulating. For supplies that do not have a minimum rating they usually have a small load resistor built into the circuit so there is always a load on the rail.
Originally Posted by UncleBob
I could see where a switcher without a load could potentially burn up but that will depend on the actual design of the supply.
"And Buck looked over at me and said "Are you sure you know how to drive this darn thing?""