Common wisdom on the internet proclaims you must use two separate power cables when attaching two 6- or 8-pin power connectors to a graphics card. According to some, using just one cable is a danger. Others say at the very least, you could be leaving performance on the table—a sad prospect, as typically only high-end graphics cards need that much power, and so you won't get your money's worth.

But like with most advice on forums and social media, what started as a reasonable guideline has been boiled down to an oversimplified rule lacking nuance. You can use a single cable’s multiple power connectors without fear of harm to your graphics card or tanking its performance. It’s usually fine.

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