Bitcoin Network Hashrate Surges Past 11 EH/s as Mining Arms Race Intensifies Amid Price Explosion

The Hardware/Software Landscape

As Bitcoin shattered the $11,000 barrier on November 29, 2017, the infrastructure powering the world’s largest cryptocurrency was undergoing its own dramatic transformation. The Bitcoin network’s hashrate had surged past 11 exahashes per second (EH/s), a staggering figure that represented a more than tenfold increase from the beginning of the year when it hovered around 1 EH/s. This exponential growth in computational power was both a cause and consequence of Bitcoin’s price rally, creating a feedback loop that would reshape the entire mining industry.

The hardware landscape in late 2017 was dominated by Application-Specific Integrated Circuit (ASIC) miners, primarily manufactured by Chinese firm Bitmain through its Antminer product line. The Antminer S9, which debuted in mid-2016, remained the workhorse of the industry, delivering roughly 14 terahashes per second (TH/s) at an energy consumption of approximately 1,375 watts. At Bitcoin’s November 2017 prices, a single S9 could generate over $1,000 per month in revenue after electricity costs — a return on investment that had miners scrambling to acquire every unit they could find.

The result was a global supply crunch. Bitmain’s Antminers were sold out through early 2018, and secondary market prices for used equipment had doubled or tripled. New entrants like Halong Mining and Canaan Creative were racing to bring next-generation hardware to market, promising even greater efficiency, but the reality remained that Bitmain controlled an estimated 70-80% of all ASIC miner production worldwide.

Hashrate and Difficulty

Bitcoin’s mining difficulty, which automatically adjusts every 2,016 blocks (approximately two weeks) to maintain a ten-minute block time, had been on a relentless upward trajectory throughout 2017. By late November, the difficulty had reached roughly 1.59 trillion, compared to approximately 320 billion at the start of January — a nearly fivefold increase in twelve months.

This adjustment mechanism is one of Bitcoin’s most elegant design features. As more miners join the network and computational power increases, the difficulty rises to ensure that blocks continue to be found at a consistent rate. Conversely, if miners shut off their equipment — as sometimes happens during price corrections that make mining unprofitable — the difficulty decreases, making it easier for remaining miners to find blocks.

Throughout November 2017, the network saw consistent difficulty increases of 10-18% per adjustment period, reflecting the flood of new mining hardware coming online. Each difficulty increase raised the bar for profitability, pushing out smaller operators with less efficient equipment and concentrating mining power among well-capitalized operations with access to the latest ASICs and cheap electricity.

Profitability Metrics

With Bitcoin trading above $11,000 and the block reward at 12.5 BTC, each successfully mined block was worth approximately $137,500 — not including transaction fees, which added another 1-3 BTC per block. The total daily mining revenue across the network exceeded $20 million, creating enormous incentive for miners to expand operations as quickly as possible.

Electricity costs remained the primary variable determining profitability. In regions with cheap hydroelectric power — particularly China’s Sichuan and Yunnan provinces, as well as parts of the Pacific Northwest in the United States and Iceland — miners enjoyed electricity rates of $0.03-0.05 per kilowatt-hour, yielding profit margins of 70-80% even with the newest hardware. In contrast, miners in regions with higher electricity costs of $0.10-0.15 per kWh found their margins squeezed to 30-50%, making older hardware unprofitable entirely.

The break-even point for an Antminer S9 at average global electricity prices of roughly $0.10/kWh had dropped below $3,000 per Bitcoin — meaning that with BTC at $11,000, miners were enjoying the most profitable environment in the cryptocurrency’s history. This profitability gap incentivized an unprecedented expansion of mining operations worldwide.

Environmental Impact

The rapid scaling of Bitcoin mining operations drew increasing scrutiny from environmental groups and energy researchers. Estimates from the Bitcoin Energy Consumption Index by Digiconomist suggested that the Bitcoin network was consuming approximately 30-35 terawatt-hours of electricity annually by late November 2017 — comparable to the energy consumption of entire countries like Denmark or Ireland.

The environmental debate was nuanced. A significant portion of Bitcoin mining, estimated at 50-60% of the global total, was concentrated in China, where miners in provinces like Sichuan relied heavily on hydroelectric power during the wet season. This meant that a substantial share of Bitcoin’s energy consumption came from renewable sources, at least during certain months of the year. During the dry season, however, many of these operations switched to coal-powered grids, significantly increasing the carbon footprint.

Critics argued that the proof-of-work system was fundamentally wasteful by design, consuming vast amounts of energy to solve computationally intensive puzzles with no real-world application beyond securing the network. Proponents countered that the energy expenditure was a necessary cost of maintaining a trustless, decentralized financial system that operated without intermediaries — and that the traditional banking system consumed far more energy when accounting for office buildings, data centers, and physical infrastructure.

Strategic Outlook

For miners, the calculus in late November 2017 was straightforward: accumulate as much hashrate as possible while margins remained historically wide. The upcoming launch of Bitcoin futures by CME in December, combined with Nasdaq’s announcement of its own futures product planned for the first half of 2018, suggested that institutional demand would continue driving prices higher — and with them, mining profitability.

However, experienced operators were also preparing for the inevitable correction. Bitcoin’s history of 30-40% pullbacks meant that mining operations needed sufficient financial reserves to weather extended bear periods. The most sophisticated miners were already implementing hedging strategies, selling forward contracts on their future Bitcoin production to lock in profits at current prices.

Looking ahead to 2018, the mining industry faced several inflection points: the ongoing centralization debate around Bitmain’s market dominance, the environmental pressures that could lead to regulatory intervention in key mining jurisdictions, and the technological arms race that would see next-generation 10-nanometer ASICs potentially double network efficiency. What was clear, as Bitcoin closed out November 2017 above $11,000, was that mining had evolved from a hobbyist activity into a multi-billion-dollar professional industry — and the arms race was only accelerating.

Disclaimer: This article is for informational purposes only and does not constitute financial advice. Mining profitability calculations are estimates and may vary based on numerous factors including electricity costs, hardware efficiency, network difficulty, and cryptocurrency prices. Always conduct thorough research before investing in mining equipment or operations.