big gap
Differences between b660 motherboard and z690 motherboard:
The b660 can only overclock memory, but the z690 can support both CPU and memory.
The scalability of the high-end b660 is far stronger than that of the Beggars z690.
Both can support ddr4\/ddr5, which can be selected according to different models.
The b660 provides 12 chip channels and the z690 provides 6 chip PCle4.0 channels.