Buying guide for Europe
Buy a Bitaxe: open-source Bitcoin miners for solo mining at home
Four Bitaxe models, plus Nerdaxe and NerdQaxe: the differences are in hash rate, power draw, cooling and noise – not in the returns. This page sorts out which device fits your home, what running it really costs per month and what a solo miner can actually do.
Which Bitaxe suits you?
Most people decide on hash rate first – and are annoyed by fan noise or waste heat later. The sensible order is the other way round: first work out where the device will stand, then power draw and noise, then compute. A miner that is a nuisance in your study ends up not running at all.
- First miner, has to be quiet in a living space: Bitaxe Gamma 601 – one BM1370 ASIC, around 15 W, under 15 dB(A), running from a 5 V power supply.
- More hash rate, same handling: Bitaxe GT with two ASICs, 2.15 TH/s at 43 W.
- Maximum performance in a single Bitaxe: Bitaxe 702 with six BM1368, 4.2 TH/s at roughly 90 W – that one needs air around it.
- Copper heatsink and continuous operation: Bitaxe Copperzilla – same performance class as the Gamma but built for low temperatures.
- Large display, own board design: Nerdaxe Gamma, or with the newer BM1373 chip the Nerdaxe Gaia – at around 10 J/TH the most efficient device in the range.
- Considerably more compute: NerdQaxe++ (4.8 TH/s) or NerdOctaxe (12 TH/s) – another league in power draw, heat and noise.
The models compared
All figures come from the manufacturer data on the respective product page. The price column is pulled live from the shop, so it is always today’s price.
| Model | Hash rate | Power draw | Efficiency | ASIC | Price |
|---|---|---|---|---|---|
| Bitaxe Gamma 601 | ~1.3 TH/s | ~15 W | ~15 J/TH | 1× BM1370 | €139.00 |
| Bitaxe Copperzilla | ~1.3 TH/s | ~15 W | ~15 J/TH | 1× BM1370 | €179.00 |
| Bitaxe GT | 2.15 TH/s | 43 W | ~20 J/TH | 2× BM1370 | €229.00 |
| Bitaxe 702 | ~4.2 TH/s | ~90 W | ~21 J/TH | 6× BM1368 | €219.00 |
| Nerdaxe Gamma | ~1.3 TH/s | ~15 W | ~15 J/TH | 1× BM1370 | €159.00 |
| Nerdaxe Gaia | ~2.6 TH/s | ~25 W | ~10 J/TH | 1× BM1373 | €239.00 |
| NerdQaxe++ | ~4.8 TH/s | ~80 W | ~16 J/TH | 4× BM1370 | €349.00 |
| NerdOctaxe | ~12 TH/s | ~200 W | ~16 J/TH | 8× BM1370 | €699.00 |
Efficiency in joules per terahash tells you how much electricity a device needs for the same work – lower is better. Between 10 and 21 J/TH there is roughly a factor of two in monthly electricity cost per terahash.
Bitaxe models in the shop
Availability, reviews and prices are on the cards themselves. If a model is sold out, you can often place a backorder – the expected waiting time is then shown on the product page.
Bitaxe Gamma | 1.3 TH/s
Bitaxe GT | 2.15 TH/s
Bitaxe 702 | 4.2 TH/s
Bitaxe Copperzilla | 1.3 TH/s
Nerdaxe Gamma | 1.3 TH/s
Nerdaxe Gaia | 2,6 TH/s
What a Bitaxe actually does
A Bitaxe is a full Bitcoin miner in miniature: it builds block candidates, computes SHA-256 and submits valid solutions to a pool or – when solo mining – to your own node. Technically it does the same as a machine in a data centre, just with a tiny share of the world’s computing power.
When solo mining that means: every attempt is its own lottery ticket. If your device finds a block, the entire reward of currently 3.125 BTC plus transaction fees goes to you – not a share of it, all of it. The probability is very small, and it does not grow because the device has been running for a long time. How small it is with your model is calculated by the mining calculator using current network data.
If you prefer small predictable amounts, run the miner in a pool and receive your share of every block the pool finds. Both work with the same hardware; switching takes less than a minute in the AxeOS firmware. More on that in our solo mining guide.
What a Bitaxe is not: an investment. The value lies in helping to secure the network yourself, understanding the technology and working without a middleman – not in a return.
Electricity cost per month
Calculated with continuous operation (730 hours a month) and an electricity price of €0.28/kWh. Use the mining calculator for your own tariff.
| Model | Power draw | Consumption per month | Cost per month |
|---|---|---|---|
| Bitaxe Gamma 601 / Copperzilla | ~15 W | ~11 kWh | about €3 |
| Nerdaxe Gaia | ~25 W | ~18 kWh | about €5 |
| Bitaxe GT | 43 W | ~31 kWh | about €9 |
| NerdQaxe++ | ~80 W | ~58 kWh | about €16 |
| Bitaxe 702 | ~90 W | ~66 kWh | about €18 |
| NerdOctaxe | ~200 W | ~146 kWh | about €41 |
Noise, heat and the right spot
The Gamma stays below 15 dB(A), under what is even noticeable in a quiet room – it may sit on your desk. From the GT upwards more heat has to leave the board and the fan becomes audible; from the 702 and the NerdQaxe models the device belongs on a shelf, in a hallway or in a homelab.
Heat is not a side effect but the main output: a device drawing 90 watts puts 90 watts of heating into the room. Pleasant in winter, an argument for a cooler spot in summer. If you want it quieter or cooler, the shop has matching heatsinks and fans as well as upgrades.
What you need besides the miner
- Power supply: Gamma, Copperzilla and Nerdaxe Gamma run on 5 V / 6 A (30 W), the GT on 12 V / 5 A, the 702 and the NerdQaxe models on 12 V / 10 A. Depending on the model a suitable supply is included or available in accessories.
- Wi-Fi on 2.4 GHz: the ESP32-S3 on board does not connect to 5 GHz-only networks. On modern routers it usually helps to separate the bands briefly.
- A target for the work: either a pool account or – for real solo mining – your own Bitcoin node.
- Optional: a mount or case so the device stands cleanly, plus a spare display or an extra fan for continuous operation.
Bitaxe, Nerdaxe or NerdQaxe?
All three come from the same open-source project and run AxeOS. The Bitaxe is the original and the leanest build. The Nerdaxe models use their own board with a large display – same technology, different looks. NerdQaxe and NerdOctaxe stack four or eight ASICs on one board and deliver a multiple of the hash rate, but need a power supply, cooling and space of a different class.
A broader comparison across all series is in the guide buy a Bitcoin miner; the technical background is in the Bitaxe miner guide.
Buying a Bitaxe at bitaxe.de
- Listed by the project: Bitaxe.de is on the Legit List of the Bitaxe project – the list can be checked on bitaxe.org.
- Shipping from Europe: we ship from Barcelona with DHL and UPS. Items in stock leave within 24 hours on working days, and inside the EU the parcel usually arrives within two to four working days. €8.99 flat, free from €300.
- Payment: Bitcoin and Lightning (with 5 % off), card, Apple Pay, Google Pay, PayPal or bank transfer.
- Warranty and returns: statutory warranty, 14-day right of withdrawal, and support from people who run these devices themselves.
- Guides included: step-by-step instructions for Bitaxe, Nerdaxe and NerdQaxe.
In short
If you want to buy a Bitaxe and are still undecided: take the Gamma 601. It is quiet enough for any room, costs about €3 of electricity a month and technically does everything the larger models do. If you want more hash rate with the same handling, the GT is the next step and the 702 the top of the single-device range. And if you are planning a jump into another performance class, you end up at NerdQaxe++ or NerdOctaxe.