That's true for the Dual OC as if I boot without the 6-pin cable in, I get a on screen message notifying me of the issue.
I noticed that the StormX PCB has a 6-pin header but the connector is not there, that's why I was hoping to manage it.
Thank you for your reply.
You're welcome. And, like I said, I could be wrong. I don't have a thorough understanding of how it all works really.
What I do know is that some voltage regulators have a way to sense +12V input voltage(e.g. with a VINSEN circuit wired to a +12V input). And they control the powering on/off of the VRM depending on the sensing of that input voltage being at or near +12V. Which, since the circuit is singular, would only work properly if it were wired to either the +12V input from the PCI-E slot or the 6-pin connector(s). Of course you could have two such circuits(one for each input). But it seems like that would be overly redundant(no real need to). If the card is intended to be solely powered by the +12V from the slot, then wire VINSEN to that +12V input. If the card is intended to be powered by both +12V inputs, then wire VINSEN to the 6-pin +12V input. No sense, pardon the pun, in doing both.
Now, if that were the whole story, and I don't know that it is, you could hard mod the card by rewiring the VINSEN pin on the VR to the +12V input from the PCI-E slot. Bypassing the whole works. Which might work just fine. Up until the point when the card draws more current than the PCI-E slot can handle. And the magical blue smoke starts leaking out of something as a result.
But, like I said, I don't know if that's the whole story or not either. Case in point, AMD has a command table in their vBIOSs that's labeled "Power Connector Detection". Which I have absolutely no idea what it does, or how it works(sounds relevant to me though). Nor do I know if Nvidia does similarly with their vBIOSs(or, again, if it's relevant). That message you get on your screen surely means that something knows something about whether or not the 6-pin connector is connected. The question is how do you make it so it doesn't know that? That I don't know...for sure anyway.
Anywho...just some things to think about.