Both the X870 and X870E

While AMD and motherboard makers have yet to confirm the launch date of the new 800-series motherboards, Amazon has jumped the gun, showing that these motherboards will be released on September 30th. Earlier leak also puts the review embargo for the same date.

Reportedly at the CES 2025 show

It appears that AMD's mainstream B850 and B840 chipset motherboards might not launch together with the X870 and X870E chipset motherboards, but, according to the latest report, these should be coming early next year, around CES 2025 show.