Seperate PSU for video...

296 Views 6 Replies 2 Participants Last post by Aaron_Henderson, Jun 21, 2007

Aaron_Henderson

Discussion Starter · Jun 21, 2007

I've got an old Delta 480W PSU lying around and was wondering what I would need to do to run my video card off of it...

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DuckieHo

· #2 · Jun 21, 2007

You would need to slave the PSU to your primary PSU so they turn on at the same time. You also need to make sure to place a decent load on the 3.3v+5v rails of the auxillary PSU for load balancing.

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Aaron_Henderson

Discussion Starter · #3 · Jun 21, 2007

how would I accomplish that?

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DuckieHo

· #4 · Jun 21, 2007

Quote:

Originally Posted by Aaron_Henderson

how would I accomplish that?

Note that these mainly are 20-pin PSUs. The newer 24-pin follow the same procedure except they have an additional 4-pins at the end.
http://www.burningissues.net/how_to/power/psu.htm
http://www.pc-mod.com/articles/atx/
http://www.techspot.com/vb/all/windo...on-button.html
http://www.bleedinedge.com/forum/arc...p?t-11336.html

To load balance, apply a LARGE resistor to the 5v rail or have the second PSU power some HDs.

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Aaron_Henderson

Discussion Starter · #5 · Jun 21, 2007

Howy many HDD's would it take to sufficiently load the second PSU? rep+ by the way

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DuckieHo

· #6 · Jun 21, 2007

Quote:

Originally Posted by Aaron_Henderson

Howy many HDD's would it take to sufficiently load the second PSU? rep+ by the way

Depends on the PSU.

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k, so I splice into ground and ps-on wires on the "master" PSU (one in sig) and wire the ground and ps-on from the slave to that and electrical tape the open wires? Will I lose any voltage/amps by splicing this way? So that's it other than making sure to load the 3.3 and 5.0V rails on slave PSU?

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