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Adept I

Power On Graphics Card RGB Without MOBO

I'm developing a bit of a collection of AMD cards that I'd really like to put on display over my desk. While designing a stand however I started wondering if there was a safe way to run the RGB (and maybe even fans?) without needing to connect it to an actual computer.

First question: is it safe to put power to a GPU through just a PCIe slot ( and the supplemental power with a custom built power supply? I'm not asking about the safety of the power supply, but the safety of a card with only power connected and nothing else

Second question: RGB lighting would probably be straight forward, but what if I wanted to put a potentiometer on the stand for controlling the GPU fans with? Is that just crazy to think of or does anyone know of a straight(ish) way of doing this?

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