2 Powersupplies on one pc???

[goocreations]

I want to connect 2 powersupplies to one pc/motherboard.
I know how to manually jump a psu, but I want my secondary psu to automatically start when the computer is switched on. The 2 psu's dont have to be connected via the atx plug's, because my 2nd psu is just powering my hdd and cooling. Secondly (just if possible), I don't want my PC to start up if either of the psu's are not connected to a powersource.

Does anyone have a solution, without cutting my psu to pieces (maybe a atx connector that you can buy on ebay)???

Thanks for any suggestions.

 

[Praeses]

http://www.take2.co.za/electronics-...psu-for-use-of-2-psu-in-1-x-case-3974915.html ?

 

[davemc]

That solves problem one.

Your second condition seems quite yucky : "I don't want my PC to start up if either of the psu's are not connected to a powersource."

You could put both power-supplies onto one cable modified to have 2 kettle-plugs and then glue them in.

 

[Toxin]

I want to connect 2 powersupplies to one pc/motherboard.
I know how to manually jump a psu, but I want my secondary psu to automatically start when the computer is switched on. The 2 psu's dont have to be connected via the atx plug's, because my 2nd psu is just powering my hdd and cooling.

This is what you need:

http://www.take2.co.za/electronics-...psu-for-use-of-2-psu-in-1-x-case-3974915.html ?

Secondly (just if possible), I don't want my PC to start up if either of the psu's are not connected to a powersource.

I don't think this is possible.

 

[Conradl]

I don't want my PC to start up if either of the psu's are not connected to a powersource.

Thanks for any suggestions.

Depends on your motherboard. You could hook a fan up and set your PC to shut down if the fan fails (in your CMOS settings). Then if you start the machine, it would run for a few seconds, detect the failed fan, and immediately shut itself down....

 

[SilverNodashi]

easiest & cheapest way is to use a daisy-chain with 2 connectors, and connect both PSU's on the same daisy chain.

 

[Drake2007]

You can pickup the PS_On# signal the mobo sends to the psu off the molex to switch on the other psu, Green wire (pin 16) and a Black (COM pins 17,18.19).

Google Intel ATX12V Power Supply Design Guide, pdf gives diagrams.

 

[goocreations]

Thanks for your replies. The Lian-li interlink connector was exactly what is was looking for, but I was buiding and cutting on both my psu's for a day now, and yippi, its working.

Thanx everyone

 

[howardb]

I've been running my dual PSU for about 4 years now - no problems. One posers the essentials, and the other all my HDD's and fans...

I made my own adapter cable from this site - got all the bits from ebay UK and it worked perfectly for 4 years. Recently got the Lian-Li cable and it works exactly the same - great.

 

[masticore]

Depends on your motherboard. You could hook a fan up and set your PC to shut down if the fan fails (in your CMOS settings). Then if you start the machine, it would run for a few seconds, detect the failed fan, and immediately shut itself down....

Fans monitored by a CMOS / BIOS have to be connected to a 3-pin connector (which supplies power to the fan) that the BIOS can monitor. This usually means onboard connectors. If the fan is being powered by another PSU, then the BIOS cannot monitor it ...

Or have I missed something obvious ?

 

[Praeses]

Fans monitored by a CMOS / BIOS have to be connected to a 3-pin connector (which supplies power to the fan) that the BIOS can monitor. This usually means onboard connectors. If the fan is being powered by another PSU, then the BIOS cannot monitor it ...

Or have I missed something obvious ?

I think he means that you should hook the sensor wire to the motherboard (yellow wire I think) and let it be powered by the second PSU which isn't directly hooked into the motherboard.

If second PSU fails, sensor will read 0 rpm and system will shut down.
If second PSU is fine, sensor will read x rpm and system will run normally.

 

[Conradl]

I think he means that you should hook the sensor wire to the motherboard (yellow wire I think) and let it be powered by the second PSU which isn't directly hooked into the motherboard.

If second PSU fails, sensor will read 0 rpm and system will shut down.
If second PSU is fine, sensor will read x rpm and system will run normally.

That is exactly what I mean

 

[masticore]

I think he means that you should hook the sensor wire to the motherboard (yellow wire I think) and let it be powered by the second PSU which isn't directly hooked into the motherboard.

If second PSU fails, sensor will read 0 rpm and system will shut down.
If second PSU is fine, sensor will read x rpm and system will run normally.

That is exactly what I mean

Oh, I see. Has anyone done this? It' be a very simple and effective way of getting the desired results.