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Need help understanding 12v rails for graphics card

Tags:
  • Power Supplies
  • Peripherals
  • Graphics Cards
  • Components
Last response: in Components
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November 16, 2010 11:25:08 AM

I am inserting new graphics card with a 2x molex to pcie x16 6pin connector. When I do this I would like to know, can I use one line of wiring a (rail) which is 12v with two 4 pin peripherals connections on. Or do I have two have two seperate lines (rails) with there own individual 4 pin peripherals on.

I hope somebody understands what I mean.

Any help is appreciated

Thanks :) 

More about : understanding 12v rails graphics card

a c 243 ) Power supply
a b U Graphics card
November 16, 2010 11:36:58 AM

Wires don't equal rails.
What psu do you have ?
a b ) Power supply
a b U Graphics card
November 16, 2010 2:29:16 PM

Not each wire is a single rail, though on high-end PSU's that's often the case.

As delluser1 asked.. what's your PSU?
Related resources
November 16, 2010 3:04:50 PM

G7 extreme power 680w.
a c 243 ) Power supply
a b U Graphics card
November 16, 2010 3:59:45 PM

desmond885 said:
G7 extreme power 680w.

Made by the worst psu provider in the world ( Deer ) I wouldn't use it for anything, but that's beside the point.
Tri rail units are usually setup with 1 rail for cpu, 1 rail for PCIE and 1 for everything else.
With no pcie connectors on your psu I doubt you have to worry about rail balancing, pick two 4 pin connectors and go.
November 16, 2010 4:46:22 PM

Thanks for advice I will get new psu I think. Could you recommend me one my budget is £60 ($90).
November 16, 2010 4:50:11 PM

Is there any chance the G7 psu could damage my new graphics card, if I used it.
a c 243 ) Power supply
a b U Graphics card
November 16, 2010 4:55:39 PM

desmond885 said:
Thanks for advice I will get new psu I think. Could you recommend me one my budget is £60 ($90).


That low quality pos could take out your entire computer, glad to hear you've decided to upgrade rather than go the adapter route.
I'm in the U.S., don't have any links to UK sites handy, if you want to provide a link I will give you a reccomendation.
a b ) Power supply
November 17, 2010 12:06:53 PM

acer0169 said:
I would suggest getting this: http://www.ebuyer.com/product/174182


I've got the Modxstream and the Fatal1ty and the Fatal1ty is a lot quieter. [:bohleyk:1]
July 3, 2014 6:05:53 AM

Hello,
This has proven useful as I am in the process on buying a GTX780Ti to replace my 670. I have G7 850w Extreme and I was wondering if this will be able to handle a 780Ti.... Would I be correct in saying that I should also replace my PSU?
!