Running power supplies in parallel?

[erikiksaz]

After learning how to convert a psu into a work bench power supply, I started to wonder...

Why don't people run two power supplies if they have power hungry quad cores and dual core SLI video cards?

The only thing that would need to be bridged would be the ON signal between the two, right?

 

[PM650]

http://forums.anandtech.com/me...id=84&threadid=2319191

As I noted in said thread, simply connecting the green wires together will work, but it provides no protection against faults for the secondary psu (the one not connected to the mobo). Do you really know how much power such a system will actually require? Perhaps less than one may think:
http://www.xbitlabs.com/articl...ay/system-wattage.html

 

[Zap]

Originally posted by: erikiksaz
Why don't people run two power supplies if they have power hungry quad cores and dual core SLI video cards?

Most cases don't fit two PSUs. Also, if you're only running graphics you will want a PSU that works well in that kind of scenario with a 12v crossload, and you probably won't find many cheap PSUs that do.

 

[SparkyJJO]

It really isn't that much more for say an 850W PSU than two 400W units anyway.