I have read and seen many articles about how to short an ATX Power supply to test power for it and then using a multimeter to check the voltages. The articles also mention best to test them under load. But what I dont see in the articles is what exactly is being used to provide the load on the machines. So what would be good to hook up to the supplies to give them a good test with load?
Secondly, is there a way to test an AT Power supply in the same way? Or is the best option to hook up an AT to ATX Adapter and test from the adapter?