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6pin AUX to 6pin PCI-E connector possible for modular PSU?

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  • Graphics
  • Cable
  • PCI Express
Last response: in Graphics Cards
March 17, 2014 5:04:40 PM

Hey everyone and thank you for taking the time to read my question.

I have a silverstone strider plus 500W modular PSU powering a sapphire 7950 Boost that has 2x 6pin PCI-E power connectors.
http://silverstonetek.com/product.php?area=en&pid=274

The back of the psu has 1 connector for an 8pin PCI-E and 3 connectors for 6pin AUX (Sata/molex). My question is if it is possible to plug in a 6pin PCI-E cable into one of the 6pin AUX connectors? The reason I ask is because I am sleeving my PSU and making my own cables, and want to avoid double wires from the 8pin PCI-E connector into 2x 6pin-PCI-E connectors for my graphics card. It would be a lot easier and look a lot nicer to create a 6pin aux to 6 pin PCI-E cable, but I am worried that the pins are powered differently. From my understanding the AUX connectors use +5V while PCI-E use +12V? Please correct me if I am wrong or enlighten me if this would be possible. Thanks!

More about : 6pin aux 6pin pci connector modular psu

Best solution

March 17, 2014 5:13:23 PM

You are actually quite lucky, silverstone was kind enough to provide the pinouts of their modular connectors, they can be found in this document
http://silverstonetek.com/goods_cable_define/st50f-p-ca...

The PCI-e connector is H3 which is 3 +12V, and 5 Com lines in the PSU, the aux connectors (H5/H9) have a 12V, 5V, 3.3V, and 2 Com lines, so normally no an Aux plug cannot feed a PCI-e connector.

And while you could make a cable to force it to, a single 12V pin should not feed the power to a PCI-e connector so even though having the pinout of the PSU allows you to make the cable to do it, i would definitely advise against it.
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March 17, 2014 7:26:51 PM

hunter315 said:
You are actually quite lucky, silverstone was kind enough to provide the pinouts of their modular connectors, they can be found in this document
http://silverstonetek.com/goods_cable_define/st50f-p-ca...

The PCI-e connector is H3 which is 3 +12V, and 5 Com lines in the PSU, the aux connectors (H5/H9) have a 12V, 5V, 3.3V, and 2 Com lines, so normally no an Aux plug cannot feed a PCI-e connector.

And while you could make a cable to force it to, a single 12V pin should not feed the power to a PCI-e connector so even though having the pinout of the PSU allows you to make the cable to do it, i would definitely advise against it.


Thanks so much for the quick response. The pin-out for the connectors was a great find.
I guess I'll have to live with double wires.
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