8 Pin PCI-E vs Dual 8 Pin PCI-E

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AlexTheTechFreak

AlexTheTechFreak

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Apr 28, 2016
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I've never seen or used a dual 8 pin PCI-E cable and was simply wondering if it's used to replace 2 separate 8 pin PCI-E's? Is it one cable that splits into two 8 pin connectors like an 8+6 pin? Can it be used in the same exact way? Is there a downside to using a dual 8 pin instead of two separate 8 pin cables? I know the name is likely self-explanatory but I want to be sure.
 
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Eximo
Ah I see.

You are talking about the daisy chained connectors where they put two 6+2 pin connectors from a single PSU connection. This is relatively common. What they typically do is use thicker gauge wire, going from 18 to 16.

6-pin carries 2 12V+ wires, 8-pin carries 3. All that is done to share the load between the wires so they don't heat up and increase resistance which causes voltage drop across the wire.
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AlexTheTechFreak

AlexTheTechFreak

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Apr 28, 2016
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I plan to use an EVGA SuperNOVA G2 650W in my next build to power a single EVGA FTW 1080. Otherwise, you can use a single dual 8 pin instead of two separate 8 pins? In the end it'd be ever so slightly more convenient and easier to cable manage.
 
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Eximo

Eximo

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May 27, 2010
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Ah I see.

You are talking about the daisy chained connectors where they put two 6+2 pin connectors from a single PSU connection. This is relatively common. What they typically do is use thicker gauge wire, going from 18 to 16.

6-pin carries 2 12V+ wires, 8-pin carries 3. All that is done to share the load between the wires so they don't heat up and increase resistance which causes voltage drop across the wire.
 
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