MINIMUM load on a power supply.

[_PD_]

Hi all,

I want to run a power supply seperate from my system, by attaching the two wires on the motherboard header.
However, apparently I need to have a certain amount on the power supply. I've been told that with only a couple of cathodes on there, it will turn itself off.
What is the minumum load required for a power supply to stay on, then?
If it helps, it's an X-connect 400W.

 

[_PD_]

Yeah, it isn't powering them in a PC though. It's for on a desk, as an external jobby - but need some cathodes for lighting.
Cheers for the advice - at least I know I can try it without it going bang!