2 power supplies in one server

Asus / Pch-dl
June 20, 2010 at 11:20:00
Specs: Windows Home server

I'm an Electronics Engineer expanding a Computer Server at home. I have reached a point where I am drawing too much current from my 750W PSU.
It is actually causing write failures on my drives.

Has anyone tried putting a second PSU in and connecting the splicing the green (pwr on) wire from both psu's together and also 2 blacks together for a common ground?

This should in theory allow both PSU's to switch on together when the on button is pressed.

I could share the load of my 10 Drives, extra fans and power hungry Motherboard.

Would the difference n voltages cause problems?

Has anyone tried this long term?

I don't wanna fry anything!

Kind regards


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June 20, 2010 at 13:32:22
I mean all this in a nice way.

No, just get a larger psu. The correct tested warrantied UL listed part. Hummm?

Any thought of that cross your mind? Use correct part instead of two wrong parts? How much is your house worth if it is burned down to the ground?

I wonder about you engineer guys. I let a friend of mine borrow a truck one time. The shift linkage slipped 180 away so he drove it back at 55 mph in second gear. I asked him why he didn't bother to call me or ask me how one might fix it. When I showed him the 4 second fix he was like wow. I still don't think he got the whole driving 180 miles in second gear was bad deal.

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June 20, 2010 at 15:54:28
I've seen a few older server boards with 2 PSU inputs. Have you checked to see if that's how your motherboard is set up?

You might check this old thread:


You're not really green until you're soylent green.

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June 20, 2010 at 19:26:20
I can't see this working. Based on the theory I learned a long time ago as an electronics technician the supply with the highest voltage output will take the larger portion of the load. The supply with the lower output voltage will essentially shut itself down in an attempt to bring the output voltage down to it's target voltage. Unless the voltages are VERY close they wont share anywhere near equally.

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