The issue with your Evga GPU not using the RGB is likely due to a software or hardware configuration problem.
The issue with your Evga GPU not using the RGB is likely due to a software or hardware configuration problem.
Your card isn’t connected at all, it won’t function without the PCIe 8 pin connectors being inserted.
I don't understand why you believed cutting the power cables for the GPU would help. Which specific card are we talking about?