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GPU mining is the use of Graphics Processing Units (GPUs) to "mine" proof-of-work cryptocurrencies, such as Bitcoin. [1] Miners receive rewards for performing computationally intensive work, such as calculating hashes , that amend and verify transactions on an open and decentralized ledger.
Mining hardware is improving at a fast rate, quickly resulting in older generations of hardware. [266] Bitcoin is the least energy-efficient cryptocurrency, using 707.6 kilowatt-hours of electricity per transaction. [267] Before June 2021, China was the primary location for bitcoin mining.
A diagram of a bitcoin transfer. The bitcoin protocol is the set of rules that govern the functioning of bitcoin.Its key components and principles are: a peer-to-peer decentralized network with no central oversight; the blockchain technology, a public ledger that records all bitcoin transactions; mining and proof of work, the process to create new bitcoins and verify transactions; and ...
Bitmain's first product was the Antminer S1 which is an ASIC bitcoin miner making 180 gigahashes per second (GH/s) while using 80–200 watts of power. [8] Bitmain as of 2018 had 11 mining farms operating in China. [7] Bitmain was involved in the 2018 Bitcoin Cash split, siding with Bitcoin Cash ABC alongside Roger Ver. [9]
Since 2020, Iran has required local bitcoin miners to sell bitcoin to the Central Bank of Iran, allowing the central bank to use it for imports. [129] Some constituent states also accept tax payments in bitcoin, including Colorado [130] and Zug (Switzerland). [131] As of 2023, the US government owned more than $5 billion worth of seized bitcoin.
In early 2018 the People's Bank of China announced the State Administration of Foreign Exchange led by Pan Gongsheng would crack down on bitcoin mining. [102] [103] Many bitcoin mining operations in China had stopped operating by January 2018. [101] A complete ban on cryptocurrency trading and mining was put into effect on 24 September 2021. [104]
The service is the largest digital distribution platform for PC games, with an estimated 75% of the market share in 2013 according to IHS Screen Digest. [2] By 2017, game purchases through Steam totaled about US$ 4.3 billion, or at least 18% of global PC game sales according to Steam Spy. [3]