I am not familiar with those new ATX style power
supplies, but won't
you need a singal to turn the power on? If you don't hook it to a
motherboard, you might need another way to provide the signal.
vax, 9000
Power_ON is pulled low to turn on ATX spec. Let it go, PSU shuts
off.
I use a jumper to short ground to usually green wire (check!)
according to the wiring info on the PSU sticker.
Cheers, Wizard