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A higher hashrate can leave less money after
electricity. This

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is why a firmware comparison needs more than a
percentage increase.

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VNISH downloads are free. Running the firmware
includes a developer share.

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We will compare three hypothetical profiles. These are
teaching

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numbers, not hardware measurements or current mining
revenue estimates.

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For each operating state, record hashrate, wall power,
your electricity

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tariff, revenue per terahash per day, and the
applicable developer share.

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Use the same currency and comparable measurement
windows. State

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whether hashrate comes from the device or the pool.

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Check the exact terms for the selected product and
build.

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The public catalog does not provide one universal
VNISH fee.

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Our revenue input is before the fee being modelled.

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We reduce that input by the assumed developer share.

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If you use actual credited revenue that already
reflects this share, do

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not subtract it again. Double counting would make the
comparison wrong.

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Daily electricity cost is wall power in watts, divided
by

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one thousand, multiplied by twenty-four hours and the
tariff per kilowatt-hour.

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Contribution after electricity is hashrate times
revenue per terahash per

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day, times one minus the modelled fee, minus
electricity cost.

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This assumes a proportional fee on revenue. Confirm
that it

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fits your data. This is contribution, not total
profit.

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For this example, electricity costs six cents per
kilowatt-hour. Hypothetical

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gross revenue is five cents per terahash per day.

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The baseline uses no modelled developer fee. Both
alternatives use an illustrative

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two percent fee. Two percent is not a quoted VNISH
rate.

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All profiles run for twenty-four hours. These
assumptions

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stay fixed while we change hashrate and power.

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The baseline has one hundred terahashes per second and
three

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thousand watts at the wall. It uses seventy-two
kilowatt-hours per day.

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At six cents, electricity costs four dollars and
thirty-two cents.

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Hypothetical revenue is five dollars, leaving
sixty-eight cents after electricity.

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Efficiency is thirty joules per terahash: three
thousand

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watts divided by one hundred terahashes per second.

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Alternative A raises hashrate by fifteen percent, to
one hundred fifteen terahashes

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per second. Power rises five percent, to three
thousand one hundred fifty watts.

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Daily energy is seventy-five point six kilowatt-hours.
Electricity costs four point five three

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six dollars. Efficiency improves to about twenty-seven
point three nine joules per terahash.

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Before the illustrative fee, revenue is five dollars
and seventy-five cents.

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After two percent, it is five point six three five
dollars.

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Subtract four point five three six dollars of
electricity. The

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contribution is one point zero nine nine dollars per
day.

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That is forty-one point nine cents more than the
baseline. This is

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a result of these assumptions, not a forecast for your
hardware.

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Now keep the same higher power, but raise hashrate
only

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five percent. Alternative B produces one hundred five
terahashes per second.

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Revenue after the illustrative fee is five point one
four

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five dollars. Electricity still costs four point five
three six dollars.

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The remaining contribution is zero point six zero nine
dollars. More hashrate,

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but seven point one cents less per day than the
baseline.

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The baseline leaves sixty-eight cents. Alternative A
leaves one point zero nine

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nine dollars. Alternative B leaves zero point six zero
nine dollars.

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A beats the baseline; B does not. The word

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faster alone cannot tell you which comparison will
win.

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Alternative A adds zero point six three five dollars
of daily revenue

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after the fee. It also uses an extra three point six
kilowatt-hours.

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Divide the extra revenue by the extra energy. The
crossover

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is approximately seventeen point six four cents per
kilowatt-hour.

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This is where the two profiles tie under fixed
assumptions. It

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is not the tariff where the whole mining operation
becomes profitable.

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At twelve cents per kilowatt-hour, the baseline
contribution becomes

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negative three point six four zero dollars per day.

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Alternative A is negative three point four three seven
dollars. A is

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still ahead by twenty point three cents, while both
results are negative.

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Better than the other profile and positive after
electricity are different tests.

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The existing ROI ASIC calculator handles energy,
electricity cost, and joules

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per terahash. It does not calculate developer fees or
full profitability.

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Use it for that part of the comparison. Keep the
revenue and fee

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arithmetic separate, and preserve all inputs so
someone else can reproduce the result.

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Before acting, check the exact fee terms, the revenue
basis, wall power,

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and comparable measurement windows. Do not deduct the
same fee twice.

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The comparison excludes cooling, overhead, other

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fees, downtime, equipment cost, financing, and taxes.

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Published by ROI ASIC. Educational animation with
synthetic narration. Sources

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and calculator are in the description. No hardware
benchmark is claimed.