Among hackers the DPS-1200FB seem to be the most popular choice for a powerfull Server PowerSupply 12volt 100Amp for less than $20 delivered.
There is a lot of information available for this PSU. So if you want to really get into controlling and monitoring the power-supply you should probably go for this one. I have collected these links to projects and information about the DPS-1200-FB.
- tech manual for similar 1100w PSU by Arrtesyn ds1100ped-3
- Teardown: HP DPS-1200FB 12V 100A PSU
- INCREASING VOLTAGE SERVER SWITCHED POWER SUPPLY
- DPS-1200FB Server Power Supply Fan Control with Arduino
- 1U Front End AC-DC Power Supply
- Hacking HP Common Slot Power supplies – 12V@100A
- Building an extremely high powered 1-12V lab power supply on the cheap
- vk4zxi.blogspot.com hacking-high-power-server-power has link to schematic of HP_HSTNS-PL11_PS-2122-1C.pdf
There is an i2c bus connection on these Server PSU used for PMBus, or som proprarity version of it, so lets see what that is all about
- Monitoring and Optimizing AC/DC Power Supply Performance for Different Applications Using PMBusTM
- ACAN-51; PMBus CommunicationProtocol
- ACAN-53: PMBus™ Communication Protocol
- Results of reverse-engineering the PIC microcontroller in the HP DPS-1200FB power supply (made by Delta)
These powersupplies does NOT have a 80-plus-gold sticker, so they might be a little less efficient than the DPS-750TB that I normally use, or maybe HP just didn’t want to pay the extra cent to get the sticker – I might do power comparison some time in the future.