Qinhuangdao Boyu Technology Co., Ltd. |
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S9 Antminer 13.5Th Used Second Hand Antminer S9 With APW3++ Bitmain Power Supply
ASIC miner
ASIC miner refers to the miner which uses ASIC chip as the core operation part. ASIC chip is a kind of chip specially designed for a specific purpose. It must be noted that it is not only used for mining, but also has a wider range of applications. This kind of chip is simple and efficient. For example, bitcoin adopts the sha256 algorithm, so bitcoin ASIC miner chip is designed to only calculate the sha256. Therefore, in terms of mining, the performance of ASIC miner chip exceeds the current top computer CPU. Because ASIC mining machine has absolute advantage in computing power, so computer, graphics card mining machine began to be phased out
Specification
Manufacturer | Bitmain |
---|---|
Model | Antminer S9 13.5Th |
Release | 2017-2018 |
Size | 135 x 158 x 350mm |
Weight | 4200g |
Chip boards | 3 |
Chip name | BM1387 |
Chip size | 16nm |
Chip count | 189 |
Noise level | 76db |
Fan(s) | 2 |
Power | 1350W |
Wires | 10 * 6pins |
Voltage | 11.60 ~13.00V |
Interface | Ethernet |
Temperature | null - 40 °C |
Humidity | 5 - 95 % |
Mining process
1. Mining is a process of increasing the bitcoin money supply.
Mining also protects the security of the bitcoin system, prevents
fraudulent transactions, and avoids "double payment", which means
spending the same bitcoin multiple times. Miners offer algorithms
for bitcoin networks in exchange for the opportunity to get bitcoin
rewards. The miners verify each new transaction and record it in
the general ledger. Every 10 minutes, a new block will be "mined",
and each block contains all the transactions from the generation of
the previous block to the present, which are added to the
blockchain in turn. We call the transactions included in the block
and added to the blockchain "confirmed" transactions. After the
transaction is "confirmed", the new owner can spend the bitcoin he
gets in the transaction.
2. Miners get two types of rewards in the process of Mining: the
new currency reward for creating a new block, and the transaction
fee for the transaction contained in the block. In order to get
these rewards, miners compete to complete a mathematical problem
based on encrypted hash algorithm, that is, to use bitcoin mining
machine to calculate the hash algorithm. This requires strong
computing power, how much the calculation process is, and whether
the calculation results are good or bad. As the proof of miners'
calculation workload, it is called "workload proof". The
competition mechanism of the algorithm and the mechanism that the
winner has the right to record transactions on the blockchain
ensure the security of bitcoin.
3. The miners also receive transaction fees. Each transaction may
contain a transaction fee, which is the difference between the
input and output of each transaction. A miner who successfully
"digs" a new block in the process of mining can get all the
transaction "tips" contained in the block. With the decrease of
mining reward and the increase of the number of transactions in
each block, the proportion of transaction fee in miners' income
will gradually increase. After 2140, all miners' earnings will be
made up of transaction fees.
4. Mining is a process of decentralizing settlement, and each
settlement verifies and settles the transaction processed. Mining
protects the security of bitcoin system, and achieves the consensus
of the whole bitcoin network without a central organization. The
invention of mining makes bitcoin very special. This decentralized
security mechanism is the basis of point-to-point e-money. The
reward and transaction fee for casting new coins are a kind of
incentive mechanism, which can regulate miners' behavior and
network security, and at the same time complete the currency
issuance of bitcoin.
1. Brand New Miners Selling
2. Used Miners Testing and Repairing Services
3. Used Miners Sources
4. Responsive Reply
5. Professional Knowledge in Mining Area
6. Dropshipping service available
All sales are final. No refunds will be granted. Used Miners are
out of warranty. Defective miners caused by transportation can be
repaired at the cost of parts and labor and Customer must return
the defective parts at his/her own expense.
We does not take any responsibility for or compensate for any loss
as result of downtime caused by delays in transportation as a
result of custom formalities or other reasons.
1. How can I trust you?
A: We can do Escrow for you as long as you willing to pay the transaction fee.
2. If my miners dont work, what can I do?
A: All miners will be tested before shipping out. We will teamview and help you to solve the problem for programing issues. For large quantity, we will provide back up accesorries, like control board, hashboard for you to replace right away. More discounts can be negotiated.
3. Is mining still profitable?
A: Hard to say.
4. What models is the best?
A: It depends. Your electricity cost, your budget, and how you know the market etc are elements for you to consider.
More Questions to be discussed.