Tb250btc motherboard and a320m
although mining does not need a large capacity storage device, it is not bad to use a small capacity solid-state hard disk, and the whole mining system will run more efficiently.
this is a motherboard launched by Yingtai for the mining market. Its main advantage is that it has multiple PCI-E slots and can connect up to six graphics cards at the same time. If it is for ordinary household use, this motherboard has little advantage
if you like Yingtai motherboard, you can take a look at b250gt3, which is compatible with 6-9 generations of processors, and the configuration is much more reasonable
X370 and B350 motherboards are not very different, mainly e to the differences in some slots and interfaces
In terms of USB interface, x370 supports two usb3.1g2 (10Gbps), six usb3.1g1 (5Gbps) and six USB2.0, while B350 supports two usb3.1g2 (10Gbps), two usb3.1g1 (5Gbps) and six USB2.0 In other words, the number of usb3.1 G1 supported by B350 motherboard is less, but in fact, most users will not use so many usb3.1 G1 interfaces, and motherboard manufacturers rarely do so many usb3.1 G1 input interfaces on the motherboard. Of course, from the perspective of expansion, x370 is certainly better than B350, but it is not very useful in practice 
in pursuit of high performance, players choose the x370 motherboard, which not only has sufficient power supply for CPU, but also can squeeze the performance of high-end R7 Series CPU as much as possible, and supports al card exchange, so the game can be refreshing
B350 is facing the pursuit of mainstream players, with R5 Series CPU, but does not support al card Crossfire (in fact, a good video card is enough, many games are not compatible with video card crossfire at present)
compared with computer performance, there are no requirements, but for ordinary and simple office and audio-visual needs, it is enough to go directly to A320
X300 and A300 are suitable for mini installation. X300 for high-end, can CPU overclocking, al card exchange, A300 for entry-level
the a320m-hdv below is the motherboard of Huaqing.
a320m can't be overclocking, which is the main difference
in addition, like PCI interface, USB interface, a320m is also streamlined, but the price is generally cheaper