Power supply for Hyperion EOS0610i??

[BrianG]

OK, you have to make sure you are choosing the wattage correctly. The wattage rating advertised on the PS is for all the voltage rails combined. So, your 400w is split between the 12v, 3.3v, and 5v. This is why I have the table of currents listed for different voltages.

Also, it is not uncommon for the 12v line to dip like that under load. You can try loading the 3.3v and/or 5v line with a low resistance. That will help the regulator circuit to make the 12v line more stable.

There might also be a small PCB mounted potentiometer to allow you to tweak the voltage a tad. Some have this, some don't. Just look around inside and if you see one, make small adjustments while watching the voltage output. If nothing changes, return it to default because it's probably being used for something else (like switching frequency or something). Since the PS has to be open and turned on to do this, be CAREFUL not to shock yourself! Many times, the heatsink is floating at ~180v DC!