Avalon Nano 3S Review: A Quiet 6 TH/s Home Bitcoin Miner and Heater

Published July 19, 2026, 07:00 UTC

The Avalon Nano 3S is Canaan's answer to a simple question: what if a real Bitcoin miner could sit quietly on your desk without sounding like a jet engine? At about 6 TH/s and 140 watts, it packs far more hashrate than a Bitaxe into a case the size of a small speaker, yet stays quiet enough for a living room. This review covers the specs, the noise, the heat, the solo odds, and exactly how to point one at a solo pool.

What is the Avalon Nano 3S?

The Nano 3S is part of Canaan's Avalon home series, a line of compact SHA-256 miners aimed at people who want to mine Bitcoin at home rather than in a warehouse. It replaced the earlier Avalon Nano 3, keeping the same 140-watt power envelope but lifting hashrate by 50 percent through a newer generation of 4-nanometer ASIC chips spread across twelve dies.

Unlike a full-size Antminer, the Nano 3S is designed to be lived with. It ships with a compact GaN USB-C power adapter, runs from a standard wall outlet, and produces about as much noise as a quiet desktop computer. It sits neatly between a tiny Bitaxe and the far larger Avalon Q in Canaan's home range.

Avalon Nano 3S specs at a glance

Here is how the Nano 3S compares with the model it replaced and with the most popular open-source desk miner, the Bitaxe Gamma. Figures are approximate and vary with firmware and ambient temperature:

Spec	Avalon Nano 3	Avalon Nano 3S	Bitaxe Gamma
Hashrate	~4 TH/s	~6 TH/s	~1.2 TH/s
Power draw	~140 W	~140 W	~18 W
Efficiency	~35 J/TH	~23 J/TH	~15 J/TH
Noise	~35 dB	~29 to 36 dB	Nearly silent
Best for	Quiet home mining	Quiet home mining, more odds	Cheapest desk lottery ticket

The headline is efficiency. The Nano 3S is not as efficient per terahash as a Bitaxe Gamma, but it delivers five times the hashrate from one small box, and it is dramatically more efficient than the Nano 3 it replaced. For a home miner who wants meaningful solo odds without a second Bitaxe on every shelf, that trade is compelling.

Hashrate and efficiency in context

Six terahashes per second sounds abstract, so anchor it. A single Bitaxe Gamma does about 1.2 TH/s. A fleet of five Gammas gets you to roughly 6 TH/s, but that means five boards, five power supplies, and five WiFi connections. The Nano 3S reaches the same hashrate in one quiet unit with a single cable.

At 140 watts and 0.12 USD per kWh, the Nano 3S costs about 12 USD per month to run around the clock. That is trivial against a potential 3.125 BTC block reward, though as always with solo mining, you should treat the electricity as the price of the lottery ticket, not an investment with a guaranteed return.

Noise and heat: built for the home

The Nano 3S is one of the few miners with real hashrate that you can genuinely ignore in a quiet room. At 29 to 36 decibels it sits below the noise floor of most desktop PCs and well under the 70-plus decibels of a full-size Antminer. There is no need for a garage, a soundproof box, or a dedicated room.

Because every watt becomes heat, the Nano 3S also doubles as a small heater. In winter its 140 watts take the edge off a home office, effectively giving your heating bill a second job. In summer, remember that the same heat adds to your cooling load, so many owners run it hardest in the colder months.

Solo mining odds with the Nano 3S

In solo mining, every hash is an independent lottery ticket, so more hashrate means more tickets per second and a shorter expected wait between blocks. At 6 TH/s the Nano 3S holds roughly five times the tickets of a single Bitaxe Gamma and about the same as a five-board Bitaxe fleet, all from one silent box.

To see real numbers for your setup, plug 6 TH/s into the solo mining chance calculator. The honest summary is that even at 6 TH/s a block remains a long shot measured in years of expected time, but the Nano 3S gives you far better odds than a single tiny miner while staying home-friendly.

How to set up the Avalon Nano 3S on mkpool

Setup is the same Stratum flow as any other miner. In the Nano 3S web dashboard:

Set the Stratum URL to btc.mkpool.com and the port to 3333.
Enter your own Bitcoin address as the username, with an optional worker name such as youraddress.nano01.
Set the password to x, save, and restart.
For encrypted mining, use port 3334 (TLS) or port 3340 (Stratum V2).

Accepted shares should appear within a minute. Track them on the miners page and confirm your connection on the connect page. Because mkpool is non-custodial, a found block pays your address directly with zero fees.

Where to buy, and is it worth it?

The Nano 3S is sold by Canaan and by home-mining specialists such as Power Mining and Solo Satoshi, typically in the 300 to 360 USD range. That is more than a Bitaxe but far less than the larger Avalon Q or a full Antminer.

For most home miners, the Nano 3S hits a sweet spot: quiet, compact, five times the odds of a single Bitaxe, and cheap enough that the electricity barely registers. If you want a broader look at how it compares with other silent options, read our quiet home miners guide, or see the full market in the best Bitcoin miners guide.

Disclaimer: Mining hardware moves fast. The specifications, efficiency figures and prices above are approximate and current as of July 2026. Always confirm the latest specs and price on the manufacturer's official site before buying. Nothing here is financial advice, and solo mining can lose money: your result depends on your electricity cost, hardware, and network conditions.

Frequently asked questions

What is the Avalon Nano 3S?

The Avalon Nano 3S is a compact home Bitcoin miner made by Canaan, part of the Avalon home series. It hashes at about 6 TH/s while drawing 140 watts, and it is designed to sit quietly on a desk or shelf rather than in a data centre. It uses the SHA-256 algorithm, so it mines Bitcoin on any standard pool.

How much hashrate does the Avalon Nano 3S produce?

The Nano 3S produces roughly 6 TH/s at 140 watts, which works out to about 23 joules per terahash. That is a 50 percent jump over the older Avalon Nano 3, which did 4 TH/s at the same 140-watt draw, thanks to a newer generation of 4-nanometer ASIC chips.

Is the Avalon Nano 3S good for solo mining?

For a quiet home device, yes. At 6 TH/s it holds roughly five times the solo lottery tickets of a single Bitaxe Gamma, so it finds shares faster and improves your statistical odds. It remains a lottery, so a block is never guaranteed, but the Nano 3S is one of the strongest near-silent solo miners you can run at home.

How loud is the Avalon Nano 3S?

The Nano 3S runs between about 29 and 36 decibels depending on its mode, quieter than most desktop PCs and close to a library whisper. That makes it one of the few real-hashrate miners you can comfortably leave running in a bedroom, living room, or home office.

Can the Avalon Nano 3S heat a room?

Every watt it consumes becomes heat, so at 140 watts the Nano 3S warms a small room like a low-power space heater. In winter that heat offsets your home heating bill, effectively making the electricity you spend on mining do double duty.

How do I connect the Avalon Nano 3S to mkpool?

Open the miner's web dashboard, set the Stratum URL to btc.mkpool.com and the port to 3333, and enter your own Bitcoin address as the username with an optional worker name. Set the password to x, save, and restart. Because mkpool is non-custodial, any block the Nano 3S finds pays your address directly with zero fees.

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Avalon Nano 3S Review: A Quiet 6 TH/s Home Bitcoin Miner and Heater

What is the Avalon Nano 3S?

Avalon Nano 3S specs at a glance

Hashrate and efficiency in context

Noise and heat: built for the home

Solo mining odds with the Nano 3S

How to set up the Avalon Nano 3S on mkpool

Where to buy, and is it worth it?

Frequently asked questions

What is the Avalon Nano 3S?

How much hashrate does the Avalon Nano 3S produce?

Is the Avalon Nano 3S good for solo mining?

How loud is the Avalon Nano 3S?

Can the Avalon Nano 3S heat a room?

How do I connect the Avalon Nano 3S to mkpool?

Mining insights in your inbox

Comments

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Keep reading

Open-Source Bitcoin Miners in 2026: Every Bitaxe, NerdAxe and Community Board Compared

Bitaxe Fleet Mining: How to Stack Multiple Miners for Better Solo Odds

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What is the Avalon Nano 3S?

Avalon Nano 3S specs at a glance

Hashrate and efficiency in context

Noise and heat: built for the home

Solo mining odds with the Nano 3S

How to set up the Avalon Nano 3S on mkpool

Where to buy, and is it worth it?

Comments

Leave a comment