The Hardware/Software Landscape
As Bitcoin blasts through $5,000 on October 12, 2017, the mining hardware landscape stands at a fascinating inflection point. The dominant mining machines at this moment are the Bitmain AntMiner S9, which delivers 14 TH/s at roughly 1,375 watts, and the AvalonMiner 741, offering 7.3 TH/s at 1,150 watts. These application-specific integrated circuit (ASIC) miners have rendered GPU mining for Bitcoin economically unviable, concentrating mining activity in purpose-built facilities.
The software stack has matured significantly since the early days of CPU mining. Mining pools have become essential infrastructure, with AntPool, F2Pool, and BTC.com controlling the majority of global hash rate. Pool mining software like CGMiner and BFGMiner have been optimized to work seamlessly with ASIC hardware, providing real-time monitoring, automatic failover, and sophisticated worker management capabilities.
The geographic distribution of mining operations is undergoing a seismic shift. China’s crackdown on cryptocurrency exchanges has not explicitly targeted mining operations, but the regulatory uncertainty has prompted many operators to explore jurisdictions with cheap electricity and favorable regulatory environments — particularly Iceland, Canada, and parts of the United States with abundant hydroelectric power.
Hashrate & Difficulty
The Bitcoin network’s total hash rate hovers around 6.5 exahashes per second (EH/s) in October 2017, a staggering increase from approximately 1.5 EH/s at the beginning of the year. This more than fourfold increase reflects the massive deployment of next-generation ASIC miners throughout 2017, driven by Bitcoin’s relentless price appreciation from $1,000 to $5,300.
Mining difficulty has correspondingly surged, reaching approximately 1.4 trillion — a level that would have been unimaginable just two years prior. The difficulty adjustment algorithm, which recalibrates every 2,016 blocks (approximately two weeks), ensures that block production remains close to the ten-minute target despite massive fluctuations in total network hash rate.
This relentless difficulty increase means that miners who purchased hardware even six months ago are seeing their competitive advantage erode. The AntMiner S9, released in mid-2016, remains profitable at current prices but generates significantly less revenue relative to electricity costs than it did when network difficulty was lower. This creates a constant arms race where miners must continually reinvest in newer, more efficient hardware to maintain their margins.
Profitability Metrics
With Bitcoin trading at $5,320, mining profitability has reached extraordinary levels. An AntMiner S9 operating at 14 TH/s with electricity costs of $0.10 per kWh generates approximately $25-30 per day in gross revenue after pool fees. At more favorable electricity rates of $0.05 per kWh — common in regions with abundant hydroelectric power — the daily profit margin expands significantly.
The concept of hashprice — the revenue generated per terahash per day — has become the mining industry’s most closely watched metric. At current difficulty and price levels, the hashprice sits at approximately $1.80 per TH/day, meaning a single AntMiner S9 earns roughly $25 daily. This represents one of the most profitable periods in Bitcoin mining history, even accounting for the elevated hardware costs and electricity expenses.
Coinbase’s announcement today that customers can instantly purchase up to $25,000 in cryptocurrency from U.S. bank accounts is likely to drive additional retail demand, potentially pushing prices even higher. For miners, this represents an unexpected tailwind — higher prices mean greater revenue per hash without any additional capital expenditure. The relationship between price and mining profitability creates a powerful feedback loop that attracts more hash rate to the network.
The breakeven electricity cost for an S9 at current difficulty and price is approximately $0.25 per kWh, meaning miners in most regions of the world are operating well within profitable territory. Even miners paying European industrial electricity rates of $0.12-0.15 per kWh are generating healthy returns.
Environmental Impact
The environmental conversation around Bitcoin mining intensifies as the network’s energy consumption grows. With 6.5 EH/s of hash rate powered predominantly by energy-intensive ASIC machines, the Bitcoin network consumes an estimated 25-30 terawatt-hours of electricity annually — roughly equivalent to the energy consumption of a small country like Ireland.
However, the environmental picture is more nuanced than raw energy consumption figures suggest. A significant portion of Bitcoin mining operations are located in regions with abundant renewable energy, particularly hydroelectric power in Sichuan province, China, during the rainy season, and geothermal energy in Iceland. These operations effectively utilize stranded energy — electricity that would otherwise go unused because it cannot be economically transported to population centers.
The counterargument is that mining’s profitability at $5,000+ Bitcoin prices incentivizes the deployment of additional hardware, some of which will inevitably be powered by fossil fuels. As miners chase cheap electricity worldwide, the geographic diversification of mining operations may actually improve the network’s overall energy mix by bringing operations to regions with excess renewable capacity.
Strategic Outlook
For mining operators, the current environment presents both opportunity and strategic complexity. Bitcoin’s fivefold price increase since January has compressed the payback period on mining hardware to as little as four to six months for well-positioned operations, making capital investment decisions relatively straightforward in the short term.
The longer-term challenge is planning for a post-halving world. The next Bitcoin block reward halving, expected in mid-2020, will reduce the mining subsidy from 12.5 BTC to 6.25 BTC per block. At today’s prices, that would cut per-block revenue from approximately $66,500 to $33,250. Miners must factor this upcoming revenue reduction into their hardware procurement and facility planning decisions.
The most sophisticated mining operations are already diversifying their strategies beyond simple hash rate deployment. Many are exploring vertical integration — building their own power generation facilities, developing custom mining firmware, and establishing relationships with institutional Bitcoin buyers to secure premium pricing for their output. Others are hedging their Bitcoin exposure through derivatives markets, locking in future revenue to de-risk their capital-intensive operations.
As the mining industry matures alongside Bitcoin’s growing mainstream acceptance, the operators who combine technical excellence with financial sophistication will be best positioned to weather the inevitable volatility and emerge profitable through multiple market cycles. The $5,000 milestone validates the substantial capital investments made by early mining operators and signals that the economic foundations of the Bitcoin network continue to strengthen.
Disclaimer
This article is for informational purposes only and does not constitute financial advice. Cryptocurrency mining involves significant capital expenditure and operational risk. Profitability depends on numerous factors including hardware costs, electricity rates, network difficulty, and Bitcoin price, all of which are subject to rapid change. Always conduct thorough research before making mining investment decisions.
running two S9s at this price point was basically printing money. the ROI dropped to under 6 months
the part about GPU mining being dead for BTC is spot on. knew guys who refused to accept it and kept burning electricity on worthless rigs
1375 watts per S9 and people were still scrambling to buy them. hashprice was insane that month