Might be a stupid question, but

>Power consumption 304 W
>Connections and connections 2x 8-pins (6+2) connection
>Minimum power supply - I'm. - 800 W
Why do I need a minimum 800W PSU when its power consumption is 304W?

I was considering a 9070 XT, but I've got a 750W PSU. Is that something I'll have to replace?