FAQ: Common questions about Bitaxe, NerdQaxe++ and solo mining

The Bitaxe is an open-source Bitcoin miner with a single ASIC chip. Schematics, board layout and firmware (AxeOS) are public, which is why several manufacturers around the world build it. Our Bitaxe units are made in Germany. The Bitaxe connects via Wi-Fi, is set up through a web interface in your browser and runs from a normal power outlet.

• Bitaxe 603 Gamma: BM1370 chip, factory-tuned to 750 MHz at 1250 mV for 1.54 TH/s, ships with the Copperzilla 2.0 in black aluminium.
• Bitaxe 602 Gamma Refurbished: a checked and reconditioned customer return of the previous model, 1.3 TH/s out of the box like a new 602.
• NerdQaxe++: four BM1370 chips, about 4.9 TH/s at roughly 75 W, 540 g solid copper heatsink, 12 V power supply.

The BM1370 by Bitmain, the same chip as in the Antminer S21 Pro. Bitmain rates it at 15 J/TH. We only use factory-new chips.

The 603 Gamma delivers 1.54 TH/s out of the box, the 602 Gamma Refurbished 1.3 TH/s, the NerdQaxe++ about 4.9 TH/s. Better cooling allows more: with the copper Copperzilla 2.0 a Bitaxe reaches about 2 TH/s at 1000 MHz and 1300 mV. Overclocking is at your own risk.

The Bitaxe 603 Gamma comes with the black aluminium version. As a separate upgrade we sell the version made of 210 g of copper with heat pipes. The copper version has more thermal headroom and is meant for the 2 TH/s performance mode. Both fit the Bitaxe Gamma only and do not fit the old Solomining stand with the lettering.

Bitaxe 603: the miner, a 41.6 W power supply (5.2 V / 8 A) with EU plug, optionally with international adapters, and a 3D-printed stand. NerdQaxe++: the miner with pre-installed heatsink and fan, a 124 W power supply with EU plug and a stand with screws. You will find a setup guide under Guides.

A Bitaxe Gamma draws about 15 to 25 W depending on its settings. Lowering frequency and core voltage a little gets it down to around 15 W at a lower hashrate. Higher settings bring more hashrate and higher consumption. The NerdQaxe++ draws about 75 W.

Frequency and core voltage, the heatsink, the thermal paste and the airflow. Higher frequency and voltage produce more heat. A larger heatsink, fresh thermal paste and a dust-free fan remove it better. Do not place the Bitaxe in a closed cabinet.

The ASIC chip runs up to 70 °C without concern. From 75 °C the firmware throttles or stops the chip, and only above 90 °C does it become dangerous. The voltage regulator is rated for continuous operation up to 120 °C, below 100 °C it is not critical. The often quoted 60 °C limit is too strict: a Bitaxe running stable at 65 °C does not need extra cooling.

Lower frequency and core voltage in AxeOS. For this case we recommend 525 MHz and 1150 mV. How to adjust the voltage step by step is explained in our Bitaxe Fine Tuning guide. The hashrate drops, the miner runs cooler and quieter. The other option is stronger cooling, for example a Noctua fan or the Copperzilla 2.0.

1. Place the Bitaxe in its stand and connect the power supply.
2. On your phone or laptop, look for the Wi-Fi network "Bitaxe_XXXX" and connect to it.
3. The AxeOS web interface opens automatically, otherwise open http://192.168.4.1 in your browser.
4. Enter your Wi-Fi under Settings. The Bitaxe only supports 2.4 GHz, not 5 GHz.
5. Enter a pool and your Bitcoin address, save and restart.

The Bitaxe then starts mining on its own.

Any pool that supports Stratum. We run our own solo pool in Germany at pool.solomining.de. The most independent option is mining through your own Bitcoin node.

Through the AxeOS interface or with our web flasher at flasher.solomining.de. The steps are on the Firmware Update page.

Dust off the fan and heatsink regularly and replace the thermal paste: we recommend replacing it after about six months, after 12 to 18 months at the latest it is necessary. Old paste noticeably reduces heat transfer.

The statutory warranty remains. Damage caused by running the device outside the frequency and voltage range provided in the firmware, for example with custom or modified firmware, is not a defect of the device.

In solo mining your miner tries to find a block on its own. If it succeeds, you receive the full block reward, currently 3.125 BTC plus transaction fees. The chance of this with a single Bitaxe is very small, which is why it is also called lottery mining.

Usually not. Compared with industrial miners a Bitaxe has too little hashrate to earn its electricity costs through pool payouts. It is worthwhile as a learning device, as a contribution to the decentralisation of Bitcoin and for the small chance of a full block. Our mining calculator shows how large that chance is for your hashrate.

Yes. In March 2025 a Bitaxe Ultra with about 480 GH/s found block 887,212, and in July 2026 a Bitaxe with about 1 TH/s found block 957,382, both solo mining. For a single device it remains a rare stroke of luck.

Our miners are made in Germany, tested before shipping and delivered with power supply, stand and a setup guide. They are CE compliant, the declaration of conformity is on each product page, and we are WEEE registered. More on our Bitaxe Made in Germany page. We are listed among the sellers on bitaxe.org. Shipping and support come from Germany.

Over the last twelve months, customers have rated us 4.78 out of 5 stars on Trusted Shops (116 reviews, as of 16.10.2026). All reviews on Trusted Shops

Yes, with Bitcoin and Lightning. Refunds, for example after a withdrawal, are made in euros for the euro amount paid, regardless of the Bitcoin price.

We ship to every European country except Russia, Belarus and Ukraine, plus the United States, Canada, Australia, Mexico, Singapore and Türkiye. Within Germany shipping costs €4.99 and is free from €50, delivery takes 3 to 5 working days. Other European countries take 3 to 10 working days depending on the country, the rest of the world 5 to 21. For deliveries outside the EU, customs and import taxes are not included and are paid in the destination country. All countries with prices and free shipping thresholds are listed in the shipping policy.