Description
Why the NerdQAxe++ — The 6 TH/s Open Source Solo Miner That Won Block #920,440
Four BM1370 ASIC chips — the same silicon that powers the Antminer S21 Pro — packed onto a single open-source board. The NerdQAxe++ is the most popular multi-chip miner in the entire OSMU ecosystem, and for good reason.
- 6.0 TH/s from four chips — Rev 6.1 delivers the hashrate of a 2015 Antminer S7 (which needed 135 chips) using just four. That is what a decade of semiconductor progress looks like on your desk.
- 16.5 J/TH efficiency — 45% more efficient than previous NerdQAxe generations. Every watt works harder, which means lower electricity bills and less heat in your home.
- Real block wins — A solo miner running six NerdQAxe++ units found Block #920,440 on October 27, 2025. The reward: 3.15 BTC — over $342,000 USD. This is not hypothetical. Every hash counts.
- Desktop-quiet, 24/7 operation — Dual-fan cooling with spring-mounted heatsink keeps ASIC temperatures under 58°C at full speed, with noise around 40 dB. Put it on a bookshelf and forget it is there.
- Hand-assembled and tested in Canada — D-Central’s ASIC repair technicians build, tune, and quality-check every unit. If something ever goes wrong, the same team that built it can fix it.
Technical Specifications
| Specification | Value |
|---|---|
| ASIC Chip | Bitmain BM1370 (Antminer S21 Pro / S21+) |
| Chip Count | 4 |
| Algorithm | SHA-256 |
| Hashrate (Stock, 600 MHz) | 4.8 TH/s |
| Hashrate (Rev 6.1 Default) | 6.0 TH/s |
| Power Consumption | ~100W |
| Efficiency | 16.5 J/TH |
| Power Input | 12V DC via XT30 connector |
| Connectivity | Wi-Fi 802.11 b/g/n 2.4 GHz (ESP32-S3) |
| Display | LILYGO T-Display S3 (1.9″ color LCD, 2 programmable buttons) |
| Firmware | AxeOS / ESP-Miner (open-source, OTA-updatable) |
| Dimensions | ~90mm x 120mm x 40mm (3.5″ x 4.7″ x 1.6″) |
| Cooling | Dual-fan system with spring-mounted heatsink |
| ASIC Temperature | ~48°C (stock) / ~57°C (full speed) |
| Noise Level | ~40 dB |
| Monthly Electricity | ~$8.70/mo at $0.12/kWh | ~$14.40/mo at $0.20/kWh |
| Open Source | Yes — GNU GPL v3.0 (firmware), open hardware design |
What’s in the Box
- NerdQAxe++ Rev 6.1 board (4x BM1370 ASICs, fully assembled and tested)
- Spring-mounted aluminum heatsink
- Dual-fan cooling assembly
- LILYGO T-Display S3 screen (pre-installed)
- XT30 power cable
- Quick start guide
You will also need: A 12V DC power supply with XT30 connector (10A / 120W minimum recommended). Available separately in our power supplies section.
Quick Setup
- Power on — Connect the 12V power supply via the XT30 connector. The display lights up and the NerdQAxe++ creates its own Wi-Fi hotspot.
- Connect and configure — Join the hotspot from your phone or computer. Enter your home Wi-Fi credentials, your Bitcoin wallet address, and your solo mining pool (e.g.,
solo.ckpool.orgorweb.public-pool.io). - Save and mine — Hit save. The NerdQAxe++ restarts, connects to your network, and begins hashing at 6 TH/s. Access the AxeOS web dashboard anytime by entering the device’s IP address in your browser.
- Monitor — The color LCD displays real-time hashrate, ASIC temperature, shares submitted, and BTC price. The web dashboard gives you full control over frequency, voltage, fan speed, and pool settings.
From unboxing to hashing in under 5 minutes. No assembly, no soldering, no Raspberry Pi required.
The OSMU Lineup — Find Your Miner
The Open Source Miners United ecosystem offers a miner at every level. D-Central carries the full lineup — the only Canadian retailer where you can start with a NerdMiner and scale all the way to a NerdOctaxe Gamma without switching shops.
| Device | Hashrate | Power | Price |
|---|---|---|---|
| NerdMiner | ~78 KH/s | ~1W | $49.99 |
| NerdNOS | 80–130 GH/s | ~8W | $139.99 |
| NerdAxe | 500 GH/s | ~12W | $189.99 |
| Bitaxe Gamma | 1.2 TH/s | ~18W | $189.99 |
| Modern Minibit | ~2 TH/s | ~25W | $229.99 |
| NerdQAxe | 1 TH/s | ~15W | $199.99 |
| NerdQAxe+ / Bitaxe GT | 2.15–2.5 TH/s | 35–55W | From $299.99 |
| Bitaxe Hex | 3+ TH/s | ~90W | $499.99 |
| NerdQAxe++ (You are here) | 6 TH/s | ~100W | — |
| NerdOctaxe Gamma | 9.6–12 TH/s | ~160–200W | TBD |
Already own a NerdQAxe++? The natural next step is the NerdOctaxe Gamma — double the chips, double the hashrate. Or stack multiple NerdQAxe++ units into a compact solo mining farm.
Your Next Step — Accessories and Upgrades
Upgrade Path
- Scale up: The NerdOctaxe Gamma doubles your chip count to eight BM1370s for 9.6–12 TH/s — the most powerful single-board OSMU miner available.
- Stack units: Run multiple NerdQAxe++ boards together for additive hashrate. Six units found Block #920,440 in October 2025.
Recommended Accessories
- 12V Power Supplies — The NerdQAxe++ needs a 12V/10A (120W minimum) PSU with XT30 connector. A quality 12V/15A unit gives headroom for sustained 24/7 operation.
Need help with any open-source miner? D-Central is a full-service ASIC repair shop — the same technicians who build your NerdQAxe++ can diagnose and repair it.
Solo Mining with the NerdQAxe++
Solo mining means you submit hashes directly to the Bitcoin network. No pool, no splitting rewards. If your NerdQAxe++ finds a valid block, you keep the entire block reward — currently 3.125 BTC.
The Odds — Honest Numbers
At 6 TH/s against a global network hashrate of ~850 EH/s, the NerdQAxe++ has approximately a 1-in-390,000 chance per day of finding a block. Over a full year of 24/7 operation, the cumulative probability is roughly 0.09%.
Those are long odds. But they are not zero. And the cost to play is about $9–15 per month in electricity.
It Happens
On October 27, 2025, a solo miner running six NerdQAxe++ units found Block #920,440. The block reward: 3.15 BTC — over $342,000 USD. This was not a pool payout divided among thousands of miners. This was one person, running open-source hardware on a desk, who hit the lottery.
Multiple Bitaxe and NerdQAxe devices have confirmed solo block finds throughout 2025, with combined payouts exceeding $1 million USD. The OSMU community tracks these wins — they are verified on-chain and real.
Why Solo Mine?
- Sovereignty — Your miner, your node, your keys. No pool operator between you and the Bitcoin network.
- Decentralization — Every solo miner is an independent vote on the network. You strengthen Bitcoin by distributing hashrate.
- The asymmetry — The cost is $9–15/month. The potential upside is 3.125 BTC. That risk/reward ratio does not exist anywhere else.
- Every hash counts — Even at 6 TH/s, you are a real participant in Bitcoin’s consensus mechanism. Your hashes secure the network.
Recommended solo mining pools: Solo CKPool (solo.ckpool.org — 2% fee, proven infrastructure, 14+ confirmed block finds) or Public Pool (web.public-pool.io — fee-free, self-hostable).
Frequently Asked Questions
What is the NerdQAxe++?
The NerdQAxe++ is a quad-chip open-source Bitcoin solo miner using four Bitmain BM1370 ASIC chips — the same chips found in the Antminer S21 Pro. Rev 6.1 delivers 6.0 TH/s of SHA-256 hashrate at approximately 100W, making it the most popular multi-chip miner in the OSMU (Open Source Miners United) ecosystem. It runs AxeOS firmware, connects via Wi-Fi, and is designed for 24/7 home operation.
What are the chances of finding a Bitcoin block?
At 6 TH/s, the NerdQAxe++ has roughly a 1-in-390,000 chance per day. Over one year, cumulative probability is approximately 0.09%. Stacking multiple units improves odds proportionally — six units running together give you roughly 0.54% annual probability. A miner running six NerdQAxe++ units found Block #920,440 in October 2025 and earned 3.15 BTC ($342,000+ USD).
What power supply do I need?
The NerdQAxe++ requires a 12V DC power supply with an XT30 connector. Minimum recommended: 10A (120W). A quality 12V/15A PSU gives headroom for sustained operation. Important: Never use a 5V power supply — the NerdQAxe++ runs on 12V. Check our power supplies section for compatible options.
How loud is the NerdQAxe++?
Approximately 40 dB at normal operation — comparable to a quiet desktop computer or a refrigerator humming. The dual-fan system is designed for 24/7 home use. You can place it on a desk, shelf, or in a closet without disturbing anyone in the room.
How much electricity does it use per month?
At 100W continuous draw: approximately $8.70 CAD/month at $0.12/kWh (Quebec average) or $14.40 CAD/month at $0.20/kWh. That is roughly the same as running two incandescent light bulbs 24/7.
Can I use the NerdQAxe++ for pool mining?
Yes. AxeOS supports both solo and pool mining. You can point it at any Stratum-compatible pool (Ocean, Braiins, etc.) for small, regular payouts. However, most NerdQAxe++ owners solo mine — the whole point of this device is the chance at a full 3.125 BTC block reward.
What is the difference between Rev 5.x and Rev 6.1?
Rev 6.1 is the latest revision with significant improvements: 6.0 TH/s default hashrate (vs 4.8 TH/s on Rev 5.x), thick 1oz copper traces for better power delivery, fuse-free design with intelligent power monitoring, improved dual-fan cooling, and reduced EMI. Rev 6.1 is 45% more electricity-efficient at full 6 TH/s than previous generations.
NerdQAxe++ vs Bitaxe Hex — which should I buy?
Both are in the 3-6 TH/s class. The NerdQAxe++ Rev 6.1 delivers 6 TH/s at ~100W using four BM1370 chips (better efficiency at ~16.5 J/TH). The Bitaxe Supra Hex delivers ~4.2 TH/s at ~90W using six BM1368 chips (~21 J/TH). The NerdQAxe++ offers more hashrate and better efficiency. The Hex is part of the Bitaxe ecosystem with AxeOS. Both are excellent — the NerdQAxe++ is the better choice for maximizing hashrate per dollar.
How do I update the firmware?
Open the AxeOS web dashboard in your browser (use the IP address shown on the display), navigate to Settings, and upload the latest firmware file. The update takes about 60 seconds. Firmware releases are published on the official GitHub repository. OTA (over-the-air) updates mean you never need to physically access the device.
What Bitcoin wallet should I use?
Any on-chain Bitcoin wallet with a native SegWit address (starting with bc1q). Recommended: Sparrow Wallet, Electrum, BlueWallet, or any hardware wallet (Coldcard, Trezor, Ledger). Never use an exchange deposit address — if you find a block, you want those 3.125 BTC in a wallet you control.
Can I buy a NerdQAxe++ in Canada?
You are buying from the builders. D-Central Technologies hand-assembles every NerdQAxe++ in our facility in Laval, Quebec. CAD pricing, fast Canadian shipping, bilingual support in English and French, and no cross-border customs or duties. Every unit is burn-tested at rated hashrate before shipping. Visit our shop to order.
What if my NerdQAxe++ needs repair?
D-Central’s ASIC repair team is the same team that builds your NerdQAxe++. They work with BM1370 chips daily, servicing everything from NerdQAxe++ units to full industrial Antminers. With 2,500+ miners repaired since 2016, D-Central offers a level of after-sale support no other OSMU retailer can match. If it breaks, the people who built it can fix it.
Built in Canada
Every NerdQAxe++ from D-Central is hand-assembled and tested in Laval, Quebec by our team of ASIC repair technicians. The same people who diagnose and repair thousands of Antminers, Whatsminers, and Avalons every year are the ones building your miner.
This is not a factory-sealed unit from an overseas warehouse. Each board is inspected, powered on, burn-tested, and verified before it ships. If it does not hold stable hashrate at rated specifications, it does not leave our facility.
And because we are also a full-service ASIC repair shop, your miner is backed by real technical support. Not a help desk reading a script — actual technicians who understand every component on that PCB. If you ever have an issue, we can diagnose and repair it in-house.
D-Central Technologies — Bitcoin Mining Hackers since 2016. We have been in the OSMU ecosystem since the beginning, pioneering accessories like the original Bitaxe Mesh Stand and developing custom heatsinks for the Bitaxe and Bitaxe Hex. When you buy from D-Central, you are buying from builders who live and breathe this technology.
Supporting Open-Source Mining
The NerdQAxe++ exists because of open-source collaboration. The hardware designs are publicly available on GitHub. The firmware is open-source under the GNU General Public License v3.0. Anyone can inspect, modify, improve, and manufacture these devices. That is how decentralized hardware development works.
$5–$10 from every OSMU device sale at D-Central goes directly back to the open-source mining community — supporting the developers who design these boards, write the firmware, and keep the ecosystem alive.
When you buy a NerdQAxe++, you are not just buying a miner. You are voting for a future where Bitcoin mining hardware is transparent, auditable, and accessible to everyone — not locked behind proprietary firmware and corporate gatekeepers.
The NerdQAxe++ is part of the OSMU (Open Source Miners United) ecosystem. Learn more about the full open-source mining lineup at our Bitaxe Hub.
Every hash counts.
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