How long can a mining truck usually dig
You can't dig in a day. It takes 2000 years
the global unified computing difficulty of bitcoin is 2621404453 (expected to change in two days). It takes more than 2000 years for a 2.5GHz CPU to work out a bitcoin
in order to make the graphics card fully loaded for a long time, the power consumption will be quite high, and the electricity bill will be higher and higher. Many professional mines at home and abroad are operated in areas with extremely low electricity charges, such as hydropower stations, while more users can only mine at home or in ordinary mines, so the electricity charges are not cheap. Even in a certain residential area in Yunnan, there was a case of crazy mining, which led to a large area trip of the residential area, and the transformer was burned
extended data:
bitcoin network generates new bitcoin through "mining". In essence, the so-called "mining" is to use computers to solve a complex mathematical problem to ensure the consistency of bitcoin network distributed accounting system
bitcoin network will automatically adjust the difficulty of mathematical problems, so that the whole network can get a qualified answer about every 10 minutes. Then bitcoin network will generate a certain amount of bitcoin as block reward to reward the person who gets the answer
when bitcoin was born in 2009, block rewards were 50 bitcoins. Ten minutes after its birth, the first 50 bitcoins were generated, and the total amount of money at this time is 50. Then bitcoin grew at a rate of about 50 every 10 minutes. When the total amount reaches 10.5 million (50% of 21 million), the block reward will be halved to 25
when the total amount reaches 15.75 million (5.25 million new output, i.e. 50% of 1050), the block reward will be further halved to 12.5. The monetary system used to have no more than 10.5 million in four years, after which the total number will be permanently limited to about 21 million
The life of the graphics card is the same as that of the general electronic components, which is 6 to 10 years< br />
because this gtx1060 has good computing power, many players use it to dig virtual currency. It's hard to say how many days to return to the original. For example, when a six piece gtx1060 3G machine was at the top of bitcoin, someone calculated that it could earn about 500 yuan a day, but the price was fluctuating at any time, so it was impossible to predict accurately
in a word, mining is risky and investment needs to be cautious.
From the second quarter of this year, bitcoin based virtual currency market is very good, and the price is also rising. In the face of such a turbulent mining tide, all graphics cards are out of stock instantly, not only a card, but also N card which is not so suitable for mining has been robbed, and the price of graphics card is rising again and again. But now, with the change of national policies, these virtual currency boom bubbles burst instantly. After the mine disaster comes, the owner of mines has also sold a lot of second-hand mine cards in order to rece the loss. Most of the prices are only half of the new graphics cards, and most of the 1060 rubbish 1060 has become a reality. p>
after most manufacturers suffered losses in the mining boom a few years ago, they are much smarter this time. Most manufacturers have adjusted the warranty policy for the mine card, either greatly shorten the warranty time, or refuse the warranty for the mine card, but it is not that the mine card is relatively easy to detect for manufacturers, so at present, even the relatively new mine card warranty is a big problem, for example, if the car overturns, the after-sales cost can only be borne by consumers themselves
is it worth buying?
although the mine card has various disadvantages, the price advantage still makes many consumers, including Xiaobian, have an impulse to buy. Is the mine card worth buying? This is not a question that can be answered. In Xiaobian's opinion, it's better not to touch Xiao. Buying a new card is the safest means. But it's not necessarily for DIY players. Although buying a mine card is a matter of gambling on character, if you master the following points, you can rece the risk a lot
1. Don't buy the graphics card of three or four line brand. Compared with the first or second line brand, many three or four line brands will shrink their materials, especially for the power supply part. Under the condition of full load power consumption for a long time, the pressure on power supply mole can be imagined. In order to have stronger performance, many non-public graphics cards of first and second tier manufacturers use better materials than public ones in many parts. Even mine cards have better quality stability than those of small manufacturers
2. Try to choose brands with better after-sales service. As above, large brands are much better than small brands in terms of after-sales service and convenience. In case of car rollover, the maintenance of large brands' graphics cards should be more convenient
We know that mining is like testing the aging of the graphics card, so the service life of the card will be shortened. However, if we can select the card with a short mining time, for example, the quality of the graphics card with only about two months is guaranteed. Take n card as an example, choosing 10 series graphics card will be safer, We can also look at the purchase or proction date of the graphics card to determine how long it has been used, and then look at the yellowing degree of the core capacitor, so that we can basically determine the remaining service life of the graphics cardfor the vast majority of users, the mine card is not worth recommending, especially for Xiao users, in case of problems, the after-sales cost and labor cost are not low, and the old companies should be cautious in purchasing mine cards, but now the mine tide is receding, the price of new cards is graally returning to the normal price, and the price advantage of mine cards is not so obvious, Why not buy a new card
bitcoin = RMB = US dollar, so everyone went to mine
virtual currency ensures the security of currency through close and complex mathematical calculation, and the more people join in mining, the safer the currency will be
mining needs calculation, and calculation needs graphics card. Ordinary graphics card can draw pictures, calculate, play games, etc. professional mining card sacrifices other functions besides calculation, and is dedicated to mining
Mining cards are generally used in professional mining machines, such as
coin potential
mining machine, which is tens of times faster than ordinary computer mining machine, and its computing power is up to 165mh / s. High computing power means that your mining speed is fast and your income is high, so now mining has entered the era of specialization and clustering. If you want to mine, you must buy mining machines and join the mining pool, otherwise the mining income is not enough to pay the electricity bill
it's almost impossible for ordinary computers to find virtual currency, because the proction of currency is a competitive mechanism. The computing power of ordinary computers is almost the same as that of professional mining machines. If you really want to calculate, your computer can't dig bitcoin. If you dig ether currency, the monthly income is 353 yuan, and the machine needs to be turned on 24 hours.
1. Integer data (integer long)
both integer and long type values are integers. After users define a variable as an integer variable, they can only assign integers to the variable. Integers are faster than floating-point numbers and occupy less memory. Integer type values have a certain range, - 32768 ~ 32767, if beyond this range, we need to use long
2. Single double values
single and double values are floating-point values, which represent real numbers with decimals. Single precision can be accurate to seven bits, while double precision can be accurate to 15 bits. When users select these data types, they should pay attention to the value range of variables. And when the value is an integer, in order to speed up the operation, it is not necessary to define the variable as floating point. For large floating-point numbers, D, e format input and output can be used.
The difference between single precision and double precision:
1. Single precision, that is, float, is stored in 4 bytes on 32-bit machine; Double is stored in 8 bytes
However, e to the difference of storage bits, the range of numerical values they can represent is different, that is, the number of digits they can accurately represent is different
extended data:
single precision
single precision refers to a way of expressing approximate value of real number by computer. In VB, single variable is stored as IEEE 32-bit (4-byte) floating-point value. Its range is from - 3.402823e38 to - 1.401298e-45 when it is negative, and from 1.401298e-45 to 3.402823e38 when it is positive
double floating point number
double floating point number is a data type used by computer, which uses 64 bits (8 bytes) to store a floating point number. It can represent decimal 15 or 16 significant digits, and the absolute value range of the digits it can represent is about 2.23x10-308 ~ 1.79x10308. IEEE754 is its customized standard