By the way I've noticed that while my low power (around 600W) Coolermaster PSUs had no problem powering ants from the start, my bigger 1kW Coolermaster PSU didn't want to start with ants (or ant, doesn't matter) connected to it, but if I turned it first, and after few secconds connected cables to ants, everything worked fine, so I guess some PSUs don't like to have high load from the start.
Paid 356 zł VAT to courier, so around 100 USD / 80 EUR.
Try connect a fan on 5v or a dvd.
What's the model number of that 1kW one? Most good high-end PSUs use a DC-DC design for the minor voltages, so don't need a load on them.