Can't really use that as a valid reason, hear me out, but everyone knows the 67xx/68xx/69xx series loves an undervolt. Here is my 6900XT which needs 3x PSU cables and ASRock recommends a 1kW PSU. Tom's hardware noted it used over 350w. This is mine with an undervolt.
Just saying you could have achieved this with your 6800 if you wanted. So I have a 6900XT using 20w more juice which actually makes it the same as the founders edition 4070 according to GN review. Tis' all. Enjoy the new card.
Funnily enough when I had a RX 6800 (XFX Merc) it only pulled around 180w of power anyway...