DDR5 graphics card on DDR4 motherboard?

Hello, I have a motherboard with two DDR4 slots, and I want to change my graphics card for a more powerful one, but while looking online, I see DDR5 mentioned in the specifications of the graphics card. Then, I came across a picture of a GPU with a connector similar to a RAM stick; do we need to connect it to a DDR5 motherboard or does it have nothing to do with it?
Because I don't believe RAM sticks exist in DDR5.