B350 and B450 are the same quality chipsets that will support all the devices up to date till 2020. B350 is much popular for its mid-range price, while B450 is for those who want more than satisfaction.  B450 has overdrive AMD precision boost and delivers higher performance and advanced stability with a heavy frequency range and boosted overclocking technology. B450 has an added ‘Bios flash’ to flash your bios anytime if you find bios update annoying.