£1,458.06
Est. Monthly
8.6 Months
Est. ROI
Antminer Z15 Pro
Equihash · 840KSOL · 2772W · Air Cooled
Gross ROI:8.6 MonthsNet ROI:
2026 ASIC Miner Rankings
Most Energy Efficient ASIC Miners in 2026
Ranked live by watts per unit of hashrate.
Compare the most energy efficient ASIC miners in 2026, ranked automatically by how little power they draw for the work they do. The highest efficiency machines are the ones that stay profitable when electricity is expensive, and the live cards further down read out the break-even power price that efficiency buys on every machine.
Most Efficient ASIC Miners
Power efficiency, live earnings and break-even rates.
Current View
| Brand | Mineable Coins | Cooling | Forecasting Notes | % Change | Details | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 |  Bitmain |
Equihash |
   |
840KSOL | 2772W | — | 3.3W/KSOL |  Air |
£12,505.00 | £14.89/KSOL | £47.90 | — | £1,458.06 | — | — | 8.6 Months | 140% | ||||
| 6 | Bitmain |
 RandomX |
       |
1000KH | 2470W | — | 2.47W/KH | Air |
£5,800.00 | £5.80/KH | £35.33 | — | £1,075.48 | — | — | 5.4 Months | 222% | ||||
| 21 | Bitmain |
 SHA-256 |
       |
580TH | 5510W | — | 9.5W/TH |  Hydro |
£10,800.00 | £18.62/TH | £20.90 | — | £636.10 | — | — | 1.4 Years | 71% | ||||
| 32 | Bitmain |
 Scrypt |
      |
20GH | 3680W | — | 184W/GH | Air |
£4,700.00 | £235.00/GH | £10.82 | — | £329.38 | — | — | 1.2 Years | 84% | ||||
| 41 | Bitmain |
SHA-256 |
|
495TH | 5940W | — | 12W/TH | Hydro |
£6,438.65 | £13.01/TH | £17.84 | — | £542.88 | — | — | 11.9 Months | 101% | ||||
| 48 |  BitDeer |
SHA-256 |
|
660TH | 8250W | — | 12.5W/TH | Hydro |
£9,730.00 | £14.74/TH | £23.78 | — | £723.84 | — | — | 1.1 Years | 89% | ||||
| 51 | Bitmain |
SHA-256 |
|
430TH | 5590W | — | 13W/TH | Hydro |
£5,804.00 | £13.50/TH | £15.49 | — | £471.59 | — | — | 1 Year | 97% | ||||
| 52 | Bitmain |
SHA-256 |
|
860TH | 11180W | — | 13W/TH | Hydro |
£10,965.00 | £12.75/TH | £30.99 | — | £943.19 | — | — | 11.6 Months | 103% | ||||
| 53 | Bitmain |
Scrypt |
|
15GH | 3150W | — | 210W/GH | Air |
£3,000.00 | £200.00/GH | £8.12 | — | £247.04 | — | — | 1 Year | 99% | ||||
| 56 | Bitmain |
SHA-256 |
|
300TH | 4050W | — | 13.5W/TH |  Immersion |
£4,000.00 | £13.33/TH | £10.81 | — | £329.02 | — | — | 1 Year | 99% |
Table Guide
How to Read the Efficiency Figures
Four short steps from watts per hash to machines your power price can support.
1
Read Watts per Hash
Efficiency is power drawn per unit of hashrate, such as W/TH. Lower numbers mean less electricity for the same work, which is the whole game.
2
Set Your Energy Cost
Enter your pence per kWh. Efficient machines hold their profit as the rate climbs, and the table shows exactly where each machine gives up.
3
Compare Cooling Types
Hydro and immersion machines often lead the efficiency table but need plumbing or tanks. Filter by cooling method to match your site.
4
Weigh It Against Price
The most efficient machines carry premium prices. Flip to the value and ROI views to check the premium earns its keep at your rate.
2026 Efficiency Explainer
How the Efficiency Ranking Works
Why watts per hash decides who survives, and how to read it like an operator.
Electricity is the one mining cost that never stops. The sections below explain what the efficiency figures measure, why they matter more as your power price rises, and how cooling choices and new chip generations move the ranking.
Watts per Unit of Hashrate
Every machine is scored on the power it draws for the hashrate it delivers, such as watts per terahash. It is the fairest single number in mining.
Cost per Coin Earned
Two machines can earn the same while one burns twice the power. Efficiency is the difference between them once the bill arrives.
Break-even Power Price
Each machine has a power rate above which it loses money. The more efficient the machine, the higher that ceiling sits above your rate.
New Chip Generations
Efficiency improves in steps as manufacturers move to smaller chips. Each generation resets the front of this table.
Cooling Method
Hydro and immersion designs run denser and often leaner than the air cooled versions of the same platform.
Spec Variants
The same model ships in several hashrate bins with slightly different efficiency. The table ranks each variant on its own numbers.
Algorithm Differences
Units differ by algorithm, such as W/TH for SHA-256 and W/KSOL for Equihash, so machines are compared fairly within their own algorithm.
Firmware and Tuning
Stock figures are the manufacturer's rating. Efficiency modes can trade a little hashrate for a leaner machine when power is dear.
Most Profitable
Chases the highest estimated earnings. Best when your electricity is cheap.
Best Value
Ranks delivered price against performance for the most machine per pound.
Best Overall
Balances every factor into one score for the all-round buying decision.
Top 10 ASIC Miners
All five ranking views over the same ten machines, with live cards for each.
Torn between an efficient machine and a cheaper one?
Tell us your power price and we will show you where the efficiency premium pays for itself and where it does not.
Important!
Earnings, profit and ROI are estimates only. Actual results vary with electricity price, network difficulty, asset price, pool fees, uptime, cooling, firmware, hosting costs and operating conditions.
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Efficiency Buying Guide
Most Energy Efficient ASIC Miners: Your Questions Answered
Frequently Asked Questions About ASIC Miner Efficiency
Clear answers about watts per hash, break-even power prices, cooling choices and when the efficiency premium is worth paying.
What the efficiency numbers mean, how to read them and why they decide long term winners.
It changes with each hardware generation and each new spec variant, which is why this page ranks machines from live product data instead of naming one model in writing.
The table above always shows the current leader on watts per hash. Whichever machine sits first on the efficiency view is the answer right now.
Watts per terahash: the power a machine draws for each terahash of SHA-256 hashrate it delivers. A machine at 15 W/TH does the same work as one at 30 W/TH on half the electricity.
Other algorithms use their own units, such as W/KSOL for Equihash, but the logic is identical everywhere: lower is better.
Hashrate decides what you earn. Efficiency decides what you keep, because electricity is the cost that never stops while you mine.
At cheap power rates the two views agree more often. As your rate rises, efficiency quietly takes over as the number that separates profit from loss.
Each efficiency card shows the power rate at which that machine's earnings equal its electricity cost. If your rate is below it, the machine can run profitably at today's conditions. Above it, it cannot.
It is the fastest filter in mining. Be wary of any machine whose break-even sits close to your rate, because one difficulty jump can push it under.
The chips themselves hold their rated efficiency well. What changes is the competition: newer machines mine the same coins on fewer watts, so an older machine's share of rewards shrinks.
Dust, heat and tired fans can also drag real world performance, which is why cleaning and cooling maintenance protect your margins.
Cooling types, old against new hardware, and what your electricity rate really changes.
Often, yes. Water carries heat away far better than air, which lets the same chips run at healthier operating points and usually delivers more hashrate for similar power.
The trade is infrastructure. Browse hydro cooled miners and air cooled miners to compare what each route asks of your site.
It depends on your power price. The old machine costs less up front but burns more per unit of work, so expensive electricity erodes its advantage month after month.
Enter your rate and compare the pair on the profit view over a month and a year. The answer usually becomes obvious.
There is no single line, but the pattern is clear: at hosted rates around 4p per kWh raw earnings dominate, while at domestic rates above 20p per kWh efficiency decides survival.
In between, let the break-even figures guide you. The further your rate sits below a machine's break-even, the more room it has to ride out difficulty rises.
Within limits. Many machines offer efficiency or eco modes that cut power draw more than hashrate, which helps when your rate is high.
Stay inside manufacturer settings and keep cooling healthy. Chasing tuning gains at the cost of stability usually loses more in downtime than it saves in power.
Per unit of work, yes: less wasted power means less heat to remove. A machine can still be loud in absolute terms if it is large, and hydro models move much of the noise to pumps and dry coolers.
If noise is the constraint, filter to home friendly models or consider hosting rather than judging by efficiency alone.
Weighing the efficiency premium, combining ranking views and getting a machine deployed.
They carry the newest chips, and buyers with expensive power compete for them because efficiency is what keeps those operations profitable.
Whether the premium makes sense for you depends on your rate. The value and ROI views show whether the extra cost earns its keep at your numbers.
ROI is the natural partner, because it tests whether the efficiency premium pays itself back in a sensible time. The overall view then sanity checks the whole package.
A machine near the front of the efficiency and ROI views at your energy rate is about as safe as a shortlist gets.
Cheap hosted power softens the pressure but never removes it. Hosting capacity is allocated per kilowatt, so an efficient machine earns more from the same allocation.
See our hosting options for current rates, then compare your shortlist with a hosting site selected in the table.
Shortlist machines whose break-even electricity price sits comfortably above your rate, then check live stock and the final checkout or invoice total.
Unsure between two? Talk to the team. We run this hardware ourselves and will explain which machine best fits your electricity price.
Not Sure the Premium Is Worth It?
Send us your electricity rate and the machines you are comparing. We will show you whether the efficient option earns back its extra cost at your rate, with stock and delivery confirmed before you order.
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Tell us which machines lead your shortlist and what you pay per kWh. We will confirm live stock and prices, check the break-even headroom at your rate and arrange delivery or hosting from there.