12-04-2013, 11:27 PM
Yes, this is possible. The safe way would be to use one of these:
http://www.add2psu.com/
The less safe way is to use a relay to short the green wire to ground (black) on the second PSU when the first PSU is turned on, but things might catch fire if you mess up.
http://www.add2psu.com/
The less safe way is to use a relay to short the green wire to ground (black) on the second PSU when the first PSU is turned on, but things might catch fire if you mess up.