Description
The Bitaxe Gamma Duo: Dual Chip Power in a Budget Friendly Package
The Bitaxe Gamma DUO 650 Model takes everything home miners love about the Bitaxe Gamma and doubles the ASIC count. Two BM1370 chips from the Bitmain Antminer S21 XP delivering a combined 1.63 TH/s at default settings, all within the exact same Bitaxe footprint. If you own a Bitaxe Gamma stand or enclosure, the Bitaxe Duo drops right in!
The high performance Dark Horse heatsink comes standard, mounted directly on the dual BM1370 ASIC chips for maximum thermal performance. A separate black aluminum anodized heatsink sits over the voltage regulator area, keeping VR temps in check so everything runs cool around the clock. The ESP32-S3 Wi-Fi module and browser based AxeOS dashboard give you full control from any device on your 2.4 GHz network with zero apps and zero cables.
Every Bitaxe Gamma Duo is assembled in the USA and ships same day from our Houston, Texas facility. Solo Satoshi has been a trusted, bitaxe.org recognized legit seller since 2024, working directly with the open source developers behind the project. Every purchase helps contribute directly to ongoing open source development and innovation.
Read more about how to get started Bitcoin mining.
Bitaxe Gamma Duo 650 Performance Overview
| Spec |
Bitaxe Gamma 602 |
Bitaxe Duo 650 |
| ASIC Chips |
1 × BM1370 |
2 × BM1370 |
| Hashrate |
1.1 TH/s |
1.63 TH/s (+48%) |
| Power Draw |
~18 W |
~25.8 W |
| Efficiency |
~15 J/TH |
~15 J/TH |
| Monthly Cost |
~$1.55 |
~$2.23 |
All values subject to ±10% variance based on ambient conditions and the silicon lottery.
Bitaxe Gamma Duo 650 Specifications
- Model: Bitaxe 650 Duo.
- ASIC Chips: 2 × Bitmain BM1370.
- Default Hashrate: 1.63 TH/s.
- Default Power Draw: ~25.8 W.
- Efficiency: ~15 J/TH at default settings.
- Noise: ~40-50 db
- Firmware: Powered by native ESP-Miner.
- Operating System: AxeOS.
- Connectivity: ESP32-S3 Wi-Fi (2.4 GHz only), browser based web UI.
- Display: Removable 0.91″ SSD1306 OLED.
- Cooling: Black anodized fin pin Dark Horse heatsink and OEM Bitaxe 40mm fan.
- Dimensions: 4″ × 2.25″ × 2″ (same as Bitaxe Gamma).
- Input Voltage: 5 V DC.
- Assembly: Assembled in the USA.
- Ships From: Houston, Texas.
See how the Bitaxe Gamma 650 DUO compares against the Bitaxe Gamma and the Bitaxe GT!
What’s Included with Your Bitaxe Gamma Duo 650
- Bitaxe Gamma Duo 650 Bitcoin solo miner with Dark Horse heatsink pre installed.
- Quick start setup card with QR code.
- Solo Satoshi and Bitaxe sticker sheet.
Optional Add Ons
- UL certified power supply (100-240V 5V/6A output).
- Solo Satoshi display stand for optimal airflow.
How to Set Up Your Bitaxe Gamma Duo
Setting up your Bitaxe Gamma Duo takes under 5 minutes:
- Connect power: Plug in the included or optional power adapter in via the barrel jack.
- Join the Wi-Fi : Connect to the “Bitaxe_XXXX” broadcast network from your phone, tablet, or computer.
- Connect to Wi-Fi: When inside of the splash page, scan for your local network. Put in your Wi-Fi password (case sensitive). Hit save and restart.
- Open the dashboard: Type the IP address displayed on the Bitaxe Gamma DUO’s screen into a phone, tablet, or computer that’s on your home network.
- Enter your Bitcoin address: Navigate to settings tab and input your on-chain Bitcoin address into the primary and fallback stratum user fields.
- Choose a pool: Point to Public Pool (assigned as default) or your preferred mining pool and hit save.
- Start mining: Your Bitaxe Duo begins hashing. Verify by navigating to the dashboard to see submitted shares.
Complete Bitaxe setup guide →
Why Buy Your Bitaxe Gamma Duo from Solo Satoshi?
- Same day shipping on all orders placed before 12PM.
- Global delivery worldwide
- 90 day warranty on every Bitaxe miner.
- Expert support from real Bitcoin miners.
- Official bitaxe.org legit seller since 2024
Solo Satoshi is recognized by the bitaxe.org project as a legit seller. We work directly with the open source developers who design and maintain the Bitaxe hardware and AxeOS firmware
When you buy from Solo Satoshi you are getting genuine, tested hardware assembled in the USA with a warranty and real humans behind the support desk. Avoid foreign knockoff clones with lower bin chips and inadequate power delivery. Buy from a seller the community trusts.
Read about the recent blocks found with Bitaxe!
Source code
Is the Bitaxe Gamma Duo 650 worth it?+
The Bitaxe Gamma Duo 650 is an affordable dual chip Bitaxe. At $117.98 for the board, you get 1.63 TH/s from two BM1370 ASIC chips in the same footprint as a single chip
Bitaxe Gamma. That is roughly 48% more hashrate than a Gamma for a modest price increase.
What is the difference between the Bitaxe Gamma Duo 650 and the Bitaxe 801 GT?+
Both use two BM1370 ASIC chips, but they target different budgets and goals. The
Bitaxe GT (801) delivers approximately 2.15 TH/s at ~43W with a larger heatsink, 60mm fan, 12V input, and a premium build designed for aggressive overclocking. The Bitaxe Gamma Duo 650 delivers ~1.63 TH/s at ~25.8W on a 5V input with a 40 mm fan and the compact Gamma form factor. The Duo is not capable of reaching GT level hashrates because its power delivery and thermal design are optimized for efficiency and affordability rather than peak performance. Choose the GT for maximum dual chip output. Choose the Duo for dual chip hashing at a lower cost.
How much hashrate does the Bitaxe Gamma Duo 650 produce?+
The Bitaxe Gamma Duo 650 produces approximately 1.63 TH/s at default settings using two BM1370 ASIC chips. That is roughly 48% more hashrate than a stock
Bitaxe Gamma (1.1 TH/s) while sharing the exact same physical dimensions. Real world averages hover around 1.58 TH/s depending on ambient temperature and the silicon lottery.
How much power does the Bitaxe Gamma Duo 650 use?+
The Bitaxe Gamma Duo draws approximately 25.8W at default settings on a 5V DC input. At a typical US residential electricity rate of $0.12 per kWh, that translates to roughly $2.20 per month. Despite running two BM1370 chips, the Duo maintains ~15 J/TH efficiency, making it one of the most cost effective ways to solo mine Bitcoin from home. Use our
Bitcoin mining profitability calculator to estimate your specific costs.
Can the Bitaxe Gamma Duo 650 mine a Bitcoin block?+
Yes. Every hash the Bitaxe Gamma Duo submits is an independent chance at winning the full 3.125 BTC block reward plus transaction fees. Confirmed Bitaxe block wins include block #853,742 on July 24, 2024, block #887,212 on March 10, 2025 worth approximately $258,000, and block #889,975 in late March 2025 mined by a stock Bitaxe Gamma at just 1.2 TH/s. The Duo's 1.63 TH/s gives you better odds than a single Gamma. Read our full breakdown at
Has Bitaxe Found a Block?.
Is the Bitaxe Gamma Duo 650 profitable?+
Traditional profitability metrics show the Bitaxe Gamma 650 Duo generates a few cents per day before electricity, resulting in a long theoretical ROI. However, this misses the point of
lottery mining. Solo mining offers binary outcomes. Either you earn nothing or you win the entire 3.125 BTC block reward plus transaction fees, currently worth over $200,000. The Duo costs roughly $2 to $3 per month in electricity, far less than typical lottery ticket purchases. For consistent satoshi payouts, you can also point the Duo to pool mining on platforms like Ocean or Braiins.
What is the difference between the Bitaxe Gamma Duo 650 and the Bitaxe 602 Gamma?+
The
Bitaxe Gamma uses one BM1370 chip and delivers approximately 1.1 TH/s at ~18 W. The Bitaxe Gamma Duo 650 uses two BM1370 chips and delivers approximately 1.63 TH/s at ~25.8 W. Both share the exact same 4" x 2.25" x 2" footprint, use the same 5 V input, run native ESP-Miner (AxeOS) firmware, and are compatible with existing Gamma stands and enclosures. The Duo gives you 48% more hashrate in the same package.
What ASIC chips does the Bitaxe Gamma Duo 650 use?+
The Bitaxe Gamma Duo uses two Bitmain BM1370 ASIC chips from the Antminer S21 XP. The BM1370 is a 3nm chip known for its industry leading efficiency.
How loud is the Bitaxe Gamma Duo 650?+
The Bitaxe Gamma Duo 650 operates between 40-50 dB depending on fan speed and workload producing noise comparable to a quiet desktop computer. The Dark Horse heatsink keeps ASIC temperatures low, which means the fan rarely needs to ramp up in a typical home or office environment.
What firmware does the Bitaxe Gamma Duo 650 run?+
The Bitaxe Gamma Duo 650 runs native ESP-Miner firmware, also known as AxeOS. This is the same open source firmware used across the entire Bitaxe family. AxeOS provides a browser based dashboard accessible from any device on your Wi-Fi network. You can adjust frequency, voltage, fan settings, and mining pool configuration directly from the web UI. Firmware updates can be applied over Wi-Fi through the settings page or via USB-C using the Bitaxe Web Flasher. Learn how at
How to Update Bitaxe Firmware.
How do I set up the Bitaxe Gamma Duo 650?+
Setup takes under five minutes. Plug in a 5 V power supply via the barrel jack. Connect to the "Bitaxe_XXXX" Wi-Fi network from your phone or computer. Enter your home Wi-Fi credentials on the splash page (2.4 GHz only) and save. After reboot, type the IP address shown on the OLED screen into any browser. Navigate to settings, enter your Bitcoin wallet address in the stratum user fields, select your mining pool, and hit save. Your Duo begins hashing immediately with both chips. For a full walkthrough visit
Bitaxe Setup Made Simple.
What power supply does the Bitaxe Gamma Duo 650 need?+
The Bitaxe Gamma Duo requires a 5 V DC power supply with at least 6A (30 W) output using a 5.5 x 2.1mm center positive barrel jack. Solo Satoshi offers a UL certified 30 W power supply (100 to 240V input, 5 V/6A output) as an optional add on at checkout. Critical requirements include stable voltage that does not drop below 5 V under load, over current and short circuit protection, and global voltage compatibility. Never use a 12V power supply as incorrect voltage will permanently damage the device.
Does the Bitaxe Gamma Duo 650 fit existing Bitaxe Gamma stands?+
Yes. The Bitaxe Gamma Duo 650 shares the exact same 4" x 2.25" x 2" dimensions as the
Bitaxe Gamma. Any stand, enclosure, or mounting solution designed for the Gamma will work with the Duo. Solo Satoshi offers an upright display stand and a stackable stand as optional add ons at checkout.
Can I overclock the Bitaxe Gamma Duo 650?+
Overclocking is possible through the AxeOS web interface by adjusting frequency and voltage settings. However, the Duo's power delivery and thermal design are built for efficiency at default settings rather than extreme overclocking headroom. If maximum overclocked performance is your priority, the
Bitaxe GT is designed specifically for that purpose with a beefier power stage, larger heatsink, and 12 V input. Overclocking any Bitaxe is done at the end user's own risk. Learn more at
How to Overclock Your Bitaxe.
What mining pools work with the Bitaxe Gamma Duo 650?+
The Bitaxe Gamma Duo supports any Stratum V1 compatible mining pool through AxeOS. For solo mining, popular options include Public Pool (assigned as default), Solo CKPool, and self hosted pools via Umbrel or Start9. For pool mining with consistent satoshi payouts, the Duo works with Ocean, Braiins, and other major pools. You can configure a primary and fallback pool in the AxeOS settings tab. Learn more at
How to Solo Mine Bitcoin with Bitaxe.
How do I reset the Bitaxe Duo 650?+
Locate the small Reset button on the side of the device. Press and hold for 2 to 3 seconds to restart. For firmware related issues or a completely unresponsive device, perform a factory flash using the
Bitaxe Web Flasher. Connect via USB-C, select the correct model and board version, choose the latest firmware, and click Start Flashing. The device restarts and performs a self test before returning to normal operation.
Is the Bitaxe Duo 650 assembled in the USA?+
Yes. Every Bitaxe Gamma Duo 650 sold by Solo Satoshi is 100% assembled and tested in the USA. Each unit is firmware flashed, quality checked, and verified to hash correctly before it ships. Solo Satoshi is a
bitaxe.org recognized legit seller since 2024 and works directly with the open source developers behind the Bitaxe project.
What is the warranty on the Bitaxe Gamma Duo 650?+
Solo Satoshi provides a 90 day warranty on every Bitaxe Gamma Duo 650. If your device has any hardware defects, we will replace it after receiving the original unit for inspection. See our
warranty policy for additional information.
Where can I buy the Bitaxe Gamma Duo 650?+
The Bitaxe Gamma Duo 650 is available at
Solo Satoshi. We are recognized by the
bitaxe.org project as a legit seller, shipping from Houston, Texas to customers in over 70 countries. Every unit is assembled in the USA with a 90 day warranty and same day shipping before 12PM CST. Avoid suspiciously cheap listings on platforms like AliExpress where foreign knockoff clones with lower bin chips and inadequate power delivery have flooded the market. Buy from a seller the Bitcoin mining community trusts.
What is the Bitaxe Gamma 650 Duo?+
The Bitaxe Gamma Duo 650 is a fully open source, dual chip Bitcoin ASIC miner designed for home use and
solo mining. It features two BM1370 ASIC chips from the Bitmain Antminer S21 lineage, delivering approximately 1.63 TH/s at ~25.8 W with ~15 J/TH efficiency at default settings.
