Do i need to have a dummy load connected on an ATX power supply if it is going to be used as a bench power supply?
Why is this dummy load needed?
What happens if i do not connect it?
Will it harm the power supply if it is used without the load?
ATX supply needs a minimum load on its output to regulate.
If you dont have a load, the output voltages will rise above their nominal values.
Depending on what the switcher chip in the supply is , the supply can shut itself down
if the output voltage goes high.
Depending on the power rating of the supply, you will have to experiment to find out what
minimum load is needed.