The Bitaxe Supra Hex 701 is a compact SHA-256 miner built for people who want to run real Bitcoin mining hardware at home without installing a multi-kilowatt industrial ASIC. LeedMiner’s current catalog specification lists 4.2 TH/s, 90 W, 12 V input, Ethernet networking and air cooling. Those figures place it far above a single-chip hobby board in total hashrate, but far below a full-size fleet machine in power, noise and heat.
This 2026 review explains what the specifications mean in practice, where the open-source Bitaxe ecosystem adds value, and which tradeoffs matter before ordering. The Supra Hex 701 product page is currently on backorder, so verify live availability rather than treating the published price as immediate shipment.
What the Bitaxe Supra Hex 701 is
The Supra Hex 701 combines several ASIC chips in one desktop-scale assembly. Its purpose is not to compete with an industrial miner on absolute hashrate or cost per terahash. It is designed for learning, solo-mining experimentation, small pooled-mining tests, firmware work and hands-on operation where low total power matters more than fleet density.
The verified LeedMiner listing specifies 4.2 TH/s at 90 W, equivalent to about 21.43 J/TH. Real results can vary with firmware, voltage, frequency, chip quality, ambient temperature, power-supply behavior and pool-side rejected shares. Treat 4.2 TH/s as a rated operating point, not a guarantee that every device will hold the same tuning settings in every room.
At 90 W, continuous energy use is about 2.16 kWh per day or 64.8 kWh in a 30-day month. Multiply that figure by the complete delivered electricity rate, including taxes and fees. Mining revenue changes with network difficulty, transaction fees, pool terms and Bitcoin price, so a fixed daily-profit claim becomes stale quickly.
Open-source hardware changes the ownership model
The official bitaxe.org GitHub organization publishes hardware and firmware projects for open-source Bitcoin mining. Its project overview identifies Bitaxe families by ASIC generation and links to design files, development work and firmware. This matters because a buyer is not limited to a sealed vendor dashboard: the community can inspect designs, build tools and improve software.
The official ESP-Miner documentation describes the ESP32-based firmware and AxeOS interface used across supported Bitaxe hardware. AxeOS exposes hashrate, temperatures, power data, pool configuration, logs, updates and an API. Firmware support still depends on the exact board configuration, so confirm that an image explicitly supports the 701 hardware before flashing it.
Open source does not remove operational risk. A wrong firmware image, aggressive voltage, weak power supply or inadequate cooling can create instability. Save the factory configuration, record the installed board and firmware versions, and change only one tuning variable at a time.
Performance, pool choice and the meaning of solo mining
A 4.2 TH/s device performs genuine SHA-256 work, but it represents a very small fraction of the Bitcoin network. Solo mining is therefore best understood as a probability experiment: the miner can find a valid block, yet the waiting time is highly uncertain. Never describe the device as a predictable solo-income appliance.
Pooled mining exchanges that lottery-like variance for smaller credited shares under the pool’s payout rules. When testing a pool, compare the local hashrate with pool-side accepted hashrate over several complete days. Track rejected shares, disconnects and worker restarts. The Bitcoin Developer Guide explains the block-header work and lower-difficulty shares used in pooled mining.
Configure a primary and backup endpoint, use a unique worker name, and verify the payout address through the pool’s official interface. Pool credentials and payout controls should be protected even when the miner itself is inexpensive.
Power, heat and noise require planning
Ninety watts is modest compared with an industrial ASIC, but it is still continuous heat inside a small enclosure. Keep the intake and exhaust clear, use a stable surface, and do not place the unit in a closed cabinet. Watch chip temperature, voltage-regulator temperature, fan speed, rejected shares and power faults after every change.
Use a reputable power supply with the correct voltage, connector, current capacity and polarity. Leave practical headroom above the steady draw. A supply that starts the miner may still sag during tuning or run too hot for continuous service. Do not assume a cable is adequate only because the connector fits.
Noise perception is room-dependent. LeedMiner’s catalog lists 48 dB, but distance, fan curve, mounting vibration and background noise affect what a user hears. Plan for a dedicated shelf or ventilated utility area if the miner will operate around the clock.
An in-stock higher-efficiency alternative: Bitaxe GT 800
Buyers who prefer a current in-stock option can compare the Bitaxe GT 800. The verified listing specifies 2.4 TH/s at 35 W, or 14.6 J/TH. It offers less total hashrate than the Supra Hex 701 but substantially lower power and better rated efficiency, which may suit a quiet desk, lab or learning installation.
A lower-cost learning option: Nerdaxe Gamma 601
The Nerdaxe Gamma 601 is another verified in-stock choice. Its catalog specification is 1.2 TH/s at 18 W, or 15 J/TH. It is appropriate when the priority is learning AxeOS, validating a pool connection or running a low-power SHA-256 device rather than maximizing desktop hashrate.
Setup and buying checklist
- Confirm the exact board revision, included power supply, connector and firmware support.
- Check live stock, batch timing, warranty and delivered cost before payment.
- Plan Ethernet access, pool endpoints, payout address and backup configuration.
- Record factory settings before firmware or tuning changes.
- Measure wall power and pool-side accepted hashrate instead of relying on one dashboard value.
- Keep airflow clear and review temperatures and errors after every change.
The Supra Hex 701 is most compelling as an open-source learning and experimentation platform with meaningful desktop hashrate. It is not a substitute for an industrial fleet miner or a predictable investment product. Compare current SHA-256 miners, model electricity with the profit calculator, and use the ASIC comparison tool before choosing a power envelope.
For a dated Supra Hex 701 availability check or an in-stock Bitaxe shortlist, contact LeedMiner with your country, electricity rate, preferred noise level, power limit and intended pool or solo-mining setup.
