21 mining machine

2. According to the current total computing power and the current growth rate of total computing power, it will take about 250 days to dig a bitcoin

3. This depends on what configuration of bitcoin mining machine you buy. Take Avalon mining machine as an example, avalon2
1t package (10 single-mode groups): the price is 13999 yuan; The price of avalon2 single-mode 100g is 1599 yuan; The price of Avalon 2-generation Miner 2 mole 200g is 2500 yuan. At present, Avalon three generation chips have been released, and Avalon 3 mining machine is about to enter the market.

4.

Mining needs high-end graphics card, mining equipment is the first to eliminate NV graphics card. Mining must be done with graphics cards. The overall structure of mining equipment and ordinary PC machine is different is the number of graphics cards. You can install four or eight through pic extension

after expansion, an expansion shelf needs to be made. To fix the graphics card and other equipment, we need to get some fans on the shelf to cool the graphics card

CPU is not very important. But not lower than i5< br />

5. This depends on the situation. If it's a mining machine of the size of USB flash disk, the computing power is only about 1g. This mining machine is a kind of experience machine. Let alone 20, it doesn't matter if there are several hundred. But if it is the kind of professional mining equipment, ordinary household electricity is simply not up, mining machine power and power consumption is very high. Moreover, the noise of mining is very large, and the heat generated is also very large. There must be powerful refrigeration equipment, which also needs power consumption

bitcoin is a consensus network, contributing to a new payment system and a fully digital currency. It is the first decentralized peer-to-peer payment network, which is controlled by its users without a central management organization or middleman. From the user's point of view, bitcoin is much like Internet cash. Bitcoin can also be regarded as the most outstanding three style bookkeeping system.

6.

0.1969btc bitcoin, which is calculated based on the mining difficulty on July 15, 2015, as shown in the following figure:

7. The most advanced bitcoin mining machine can only dig out a bitcoin in one or two years. Now it is more and more difficult to dig out bitcoin because its number is decreasing,