Converting computer SERVER power supplies to make a high quality 12VDC High Current Radio Power Supply
It doesn’t normally require any modification to the supply but the hard part is figuring out how to trick them into turning on.
Far and away the best way is to find someone who has already done it.
By John at https://www.rcgroups.com/forums/member.php?u=69126
I have put down a few references I know about and welcome additions.
This is about SERVER supplies which often have large 12V capacity and not much else; it is NOT about converting normal PC power supplies. (The ‘ground the green wire and add a load resistor’ stuff). That is covered extensively elsewhere.
UPDATE There are now available supplies for PCs that have substantial 12V rails and large (850-1200 Watt) capacity that work without any electrical conversion. If you have used one of these, suggest you start a separate thread.
IF YOU HAVE AN OPINION OR JUST WANT TO COMMENT OR HAVE A QUESTION ABOUT CONVERTING A PARTICULAR SUPPLY please do it in the forums.
Bottom Line: If you have an unknown supply you need help with, try a post in the original 12v 100A supply thread (link 2 below) which seems to have a good range of posters – or start a new one with a specific title that includes your question. That thread now has some good info on how to solve an unknown supply as well. See the first few posts. When/if you ever get it to work, then post the link to that info here to make it easier for others to find.
If you have an unknown supply and can’t find the information from someone who has already solved it then this post contains the best information/links on how to establish which pins might turn it on and control the output voltage.
Hope this proves useful. John
Best post on how to deal with an unknown supply
Various threads containing information on converting different supplies.
DELL DPS-312ABA PSU
This DELL PSU is still eluding me on the switch on connections to make it work, which is annoying as I have a dozen of them!