I thought I would share this possible little gem with you all. There is a known issue with HP g5 server power supplies, they are normally the cause of unstable servers. Well, today at work I thought I would have a play with some of the dead ones. I tested 5 and on all of the ones I tested the -12v rail was dead but the +12v was still working. These little babies actually kick out 12.9v at upto 80a if you connect the sens pin directly to 12v rail. There is a little trimmed inside that you can adjust this with though should you want a bit more voltage. If anybody is actually interested I can post a link to a pic of how to connect them up when I get back to work on monday.