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View Full Version : Power Supplies.. single and dual +12V rail



Myth
14-07-2012, 11:51 AM
What is the difference between a single +12V rail PSU, and a PSU with more than one +12V rail?

I would assume the multi rail +12V PSU would be better? But I'm not sure

Also, any advantages or disadvantages between the 2?

linw
14-07-2012, 04:14 PM
Google is your friend. Try this http://www.tomshardware.com/forum/306437-28-single-rail-multiple-rails-eternal-question-answered

dugimodo
14-07-2012, 05:05 PM
A large single rail is actually the best in my opinion, that way you don't have to worry about what's plugged in where but just whether the PSU has enough wattage.

You could think of multiple rails as separate 12V supplies sharing the load, but the article linw linked explains it better. In practice it's completely unimportant.

Myth
14-07-2012, 06:58 PM
Thank you

Slankydudl
14-07-2012, 08:17 PM
dugimodo a single 12v is probably better but are there any in high wattages?

dugimodo
15-07-2012, 02:15 AM
Yeah there are some, I've seen 50A on a single 12V rail before. Generally it's cheaper to go multi rail though so it's not as common.

JackDani
15-07-2012, 08:21 AM
Hey guys,

putting my 2 cents into the conversation, if someone used a power supply like this one https://mrosupply.com/product/1011352-SolaHD-Electrical_Power_Supplies_Switching_Power_Supplies
and what do you think of this brand?

Myth
15-07-2012, 09:14 AM
Hey guys,

putting my 2 cents into the conversation, if someone used a power supply like this one https://mrosupply.com/product/1011352-SolaHD-Electrical_Power_Supplies_Switching_Power_Supplies
and what do you think of this brand?From the manufacturers site; these are more for industry standard computers

http://www.emersonindustrial.com/en-US/egselectricalgroup/products/control-power-solutions/power-supplies/gl-single-multi-output-switchers/Pages/default.aspx

Slankydudl
15-07-2012, 09:15 AM
Well its expensive for such a very low wattage and i get the feeling it is not designed for use in computers.