Question Is Rx580 really far power hungry than gtx1660?

Aug 6, 2019
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Good night all. I was thinking about buying a rx580 for his cxb, but I know this gpu must need a 600W psu to run safe. I was looking at gtx1660 too, it can't be Soo cxb than 580, but it has more power efficiency, needs a 450W psu. My question is: there gonna be much difference on electricity bill if I choose rx580 instead 1660?