How much is Yintai miner

1. bitcoin machines are common, but lightcoin machines are rare. I've seen it appear on KNC's official website. The computing power of the Laite coin miner is only 100mh / S (I just looked at it on the official website and found that it has been upgraded to 250, and the price has not changed). The price is nearly 10000 US dollars. I think it's too expensive. Learn more about kncminer
recently, the state seems to have issued a document to cancel the bank accounts of major domestic trading platforms. Be careful.

2.

Yingtai tb250-btc is a B250 chipset, which can only use DDR4 memory, and does not support ddr31600

to play CF underground city, you'd better change to a better CPU. You can use g4560, because the performance of g4400 is too poor

3. It may be this problem, or it may be the setting of the miner. You can ask the next pool operators or mining machine vendors. But you can't get much bitcoin with USB. If it's OK to experience mining, it's basically difficult to get profits from it.