Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I have followed the guides on the internet, in short to start the second PSU short the green wire on P1 with a black ground wire and the PSU will start.

This works, my second PSU does start. But if i attach any harddrives to it it turns itself off after 1-2 seconds. If i only connect fans or nothing it will remain running.

If it mathers the PSU is from colermaster. They're both ATX powersupplies, and i have tried to use 2 different ( But same brand/model) PSU as the second PSU.

share|improve this question
My quick recommendation would be to avoid all of this by buying a much larger single power supply. – Troggy Jul 13 '10 at 17:46
Nobody has 1k watt powersupplies in stock around where i live. would also be fun to this just for the geek fun – EKS Jul 13 '10 at 17:54

Instead of just jumping it out, you could try this adapter cable.

share|improve this answer
It shutting off under load sounds like a loose connection or bad PSU to me. I have this configuration working at my house. – RobotHumans Jun 27 '11 at 18:34

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.