Bought this graphics card without realising that it has an extra 8 pin connector. Do I have to use all 3? My power supply only has 2 PCI/E slots. If I need to use all 3, can I use an adapter to avoid having to replace the power supply?

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Hi
How many watts does your power supply have? Does it have the recommended min 750 watts? Usually 750 watts and more have enough PCI ports.
In general, all 3 should be used. My opinion.

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Question about ASUS GeForce ROG STRIX RTX 3070 Ti GAMING

Bought this graphics card without realising that it has an extra 8 pin connector. Do I have to use all 3? My power supply only has 2 PCI/E slots. If I need to use all 3, can I use an adapter to avoid having to replace the power supply?