да понял, вот какой-то обзор прочел ... там ктотоо за серию B - чипсетов топил, дескать и другое поколение поддерживает замчем больше платит
DO NOT PAIR A "B" CHIPSET MOTHER BOARD WITH A +100W TDP CPU!
Although they are compatible, B350/450 won't last long with a R7 2700x, for instance. The B mobo's VRMs won't be able to cool the chips properly, even if you're not planning to overclock. I had a Asrock AB350 pro4 paired with a 2700x and it didn't last a year cause the chipset gave in. Do yourselves a favor and don't repeat my mistake. If you own a B board and are planning to change your CPU, stay on the Ryzen 5, which are very competent, or just change the platform altogether