These motherboards support different CPUs. The first four are all similar. They are popular motherboards and support the same CPU. The latter is currently a high-end motherboard, which supports different CPUs from the first four.Because the number of CPUs supported is relatively small and the motherboard performance is high, the price is often high. In general, b85 and z97 are the most widely used of the first four items, of which b85 is more cost-effective, more popular, and z97 is better at overclocking.The x99 is a high-end motherboard.