I have a machine with:
- Mobo: ASUS P5QL PRO
- RAM: DDR2- 8GB
- GRAPHICS: Gigabyte R7 360 series
- HDD: 6 discrete units plugged in 6 SATA ports. (some are 1TB, some are 500GB, some are 320/250GB)
I power this machine with two PSU units, instead of one, both pulled from old Dell desktop machines. I used two PSU units to fulfill the power drawn by the system, for I can't spend enough on this old machine to put in a single 600W PSU.
First PSU 305W powers the motherboard and its peripherals except HDDs.
Second PSU 220W: powers the six HDDs through their SATA power connecters. A different PSU was used previously and worked OK.
Problem is with the second PSU. The usual way of connecting GREEN to GND usually turns on a CPU. But when I put the jumper in this unit, the PSU fan doesn't start and the PSU doesn't supply power.
Now for testing, I put this second Dell PSU 220W to power the motherboard. It works fine and system comes on as soon as I push power button.
I read somewhere that some PSUs wouldn't supply power just grounding Green wire till they sense some load on power rails. But in my case I am connecting all six HDDs to the secondary PSU while I do the trick. Still it does not switch on to power the HDDs.
So does it mean that all six HDDs' power load is not enough to switch ON this specific PSU?