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The Hashrate
Free tool

ASIC Efficiency Comparison

Compare two mining machines on joules per terahash, energy use and running cost.

Free to useNo sign-upRuns in your browser
Machine A
Machine B
MeasureMachine AMachine BBetter

Efficiency in joules per terahash (J/TH) is the standard way to compare mining hardware: lower is better. It is power draw divided by hashrate, so it tells you how much electricity a machine burns for the same amount of work. Preset figures come from manufacturers' published spec sheets; real-world draw at the wall varies with firmware, ambient temperature and tuning.

Efficiency in joules per terahash (J/TH) is the number miners actually compete on, because electricity is the dominant running cost of proof-of-work mining. It is simply power draw divided by hashrate, so a lower number means less electricity burned for the same work. This tool puts two machines side by side on efficiency, daily energy use and daily running cost at your electricity rate, and marks which one wins on each measure. Preset figures are taken from manufacturers' published spec sheets; actual draw at the wall varies with firmware, tuning, ambient temperature and power-supply losses, so treat spec-sheet efficiency as a best case.

FAQ

What is a good J/TH figure?

Lower is better. Current-generation Bitcoin ASICs are broadly in the high teens to mid twenties of joules per terahash; older machines are considerably higher, which is why they stop being profitable first when prices fall.

Why compare efficiency instead of raw hashrate?

Raw hashrate tells you how much work a machine does, but not what it costs to do it. Two machines with the same hashrate can have very different power bills, and electricity is the dominant ongoing cost.

Are the preset numbers measured?

No. They come from manufacturers' published spec sheets. Real draw at the wall varies with firmware, tuning, ambient temperature and power-supply losses.

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Tools are provided for information and planning only and are not financial advice. Figures are estimates; crypto is volatile and high-risk. Always do your own research.