Description
Why the NerdQAxe+ — The Quietest Quad-Chip Open Source Bitcoin Solo Miner
The NerdQAxe+ takes the quad-chip architecture that the original NerdQAxe pioneered and upgrades it with BM1368 chips — the same ASIC silicon that powers the Antminer S21. The result is a quieter, more efficient quad-chip solo miner that delivers 2.4–2.5 TH/s at just 50–55W, with a best-in-class efficiency of ~20 J/TH.
- Four BM1368 chips, S21-generation efficiency — each chip is a direct descendant of the silicon in Bitmain’s Antminer S21, one of the most efficient industrial miners ever built. The NerdQAxe+ puts that efficiency on your desk.
- Whisper-quiet operation — rated at less than 25 dBA in quiet mode, the NerdQAxe+ is the quietest quad-chip miner in the OSMU lineup. Run it in your bedroom, office, or living room without anyone noticing.
- CE certified — this is not a prototype or a dev board. The NerdQAxe+ has passed CE certification (Bitronics), making it a legitimate commercial product with verified electromagnetic compatibility and safety standards.
- New thermal design — a precision-machined aluminum heatsink paired with an 80mm ThermalRight fan and a new buck converter that reduces operating temperatures by 10+ degrees Celsius compared to the original NerdQAxe.
- Plug-and-play with full dashboard — the 1.9″ color LCD and browser-based AxeOS interface give you real-time visibility into hashrate, chip temperatures, power draw, uptime, and Bitcoin network stats. Set up in under 5 minutes via Wi-Fi.
The NerdQAxe+ sits in the sweet spot of the OSMU lineup: more hashrate and better efficiency than single-chip miners, quieter and more affordable than the NerdQAxe++ or NerdOctaxe. For home miners who want meaningful quad-chip hashrate without the noise, heat, or power draw of higher-tier devices, this is the one.
D-Central Technologies has been in the OSMU ecosystem since the early days — we created the original Bitaxe Mesh Stand, developed custom heatsinks for the Bitaxe and Hex, and have shipped thousands of open-source miners from our facility in Laval, Quebec. Every NerdQAxe+ is inspected and tested by our ASIC repair technicians before it leaves our shop. $5–$10 from every sale goes directly to OSMU development.
Technical Specifications
| Specification | Value |
|---|---|
| ASIC Chip | Bitmain BM1368 (Antminer S21 generation) |
| Chip Count | 4 |
| Algorithm | SHA-256 |
| Hashrate (Stock) | 2.4–2.5 TH/s |
| Hashrate (Overclocked) | Up to ~3.0 TH/s |
| Power Consumption | 50–55W at stock settings |
| Idle Power | <3W |
| Efficiency | ~20 J/TH (stock), ~17.5 J/TH (tuned) |
| Power Input | 12V DC, barrel jack (8A power adapter) |
| Recommended PSU | 12V / 10A, 120W (UL-certified) |
| Connectivity | Wi-Fi 802.11 b/g/n, 2.4 GHz (ESP32-S3) |
| Display | LILYGO T-Display S3 (1.9″ color LCD, removable) |
| Firmware | AxeOS (ESP-Miner fork), open-source, OTA-updatable |
| Cooling | Precision-machined aluminum heatsink + 80mm ThermalRight fan |
| Noise Level | <25 dBA (quiet mode), ~40 dB (normal) |
| Weight | ~270g (~0.6 lbs) |
| CE Certified | Yes (Bitronics) |
| Open Source | Yes — GitHub: shufps/qaxe (revision 5.0) |
| Monthly Electricity Cost | ~$4.80/month at $0.12/kWh |
What’s in the Box
- Fully assembled NerdQAxe+ with 4x BM1368 ASIC chips
- LILYGO T-Display S3 color screen (removable)
- Precision-machined aluminum heatsink (pre-installed)
- 80mm ThermalRight cooling fan (pre-installed)
- AxeOS firmware pre-loaded and ready to mine
You will also need: A 12V DC power supply (10A / 120W recommended) — available separately in our shop. The NerdQAxe+ uses a standard barrel jack connector.
Quick Setup
- Power on — Connect the 12V power supply. The NerdQAxe+ boots up in seconds and creates its own Wi-Fi hotspot. The SSID appears on the color LCD screen.
- Connect and configure — Join the hotspot from your phone or computer. Your browser opens the AxeOS setup portal automatically. Enter your home Wi-Fi credentials, your Bitcoin wallet address, and your solo mining pool (e.g.,
solo.ckpool.orgorweb.public-pool.io). - Start mining — Save settings and the NerdQAxe+ connects to your network. All four BM1368 chips spin up and begin hashing. The LCD and web dashboard show real-time hashrate, chip temperatures, shares submitted, and Bitcoin network stats.
- Tune it your way — Use the AxeOS web portal to adjust ASIC frequencies and voltages. Push toward 3 TH/s with overclocking, or dial it back for ultra-quiet operation. Over-temperature security controls keep the hardware safe regardless of your settings.
The OSMU Lineup — Find Your Miner
D-Central carries the complete open-source mining ecosystem — from your first educational miner to a serious multi-chip solo rig. The NerdQAxe+ hits the quad-chip sweet spot: four chips, quiet enough for any room, efficient enough for 24/7 operation.
| Device | Hashrate | Power | Price |
|---|---|---|---|
| NerdMiner | ~78 KH/s | ~1W | $49.99 |
| NerdNOS | 80–130 GH/s | 7–8W | $139.99 |
| NerdAxe | ~500 GH/s | ~12W | $189.99 |
| Bitaxe | 625 GH/s – 1.2 TH/s | 12–21W | $189.99 |
| Minibit | ~2 TH/s | ~21W+ | $229.99 |
| NerdQAxe | 1.7–2.4 TH/s | ~55W | Clearance |
| NerdQAxe+ | 2.4–2.5 TH/s | 50–55W | From $299.99 |
| Bitaxe GT | 2.15 TH/s | 35–43W | From $299.99 |
| Bitaxe Hex | 3+ TH/s | ~60W | $499.99 |
| NerdQAxe++ | 4.8–6 TH/s | 70–100W | Coming Soon |
| NerdOctaxe Gamma | 9.6–12 TH/s | 160–200W | Coming Soon |
All prices in CAD. Visit the Bitaxe Hub for deep-dive guides, comparisons, and setup tutorials across the full OSMU lineup.
Your Next Step — Accessories and Upgrades
Want more hashrate? The Bitaxe Hex ($499.99) delivers 3+ TH/s from six chips. For maximum open-source hashrate, the NerdQAxe++ pushes 6 TH/s from four BM1370 chips — the most popular multi-chip OSMU miner.
Complete your NerdQAxe+ setup with a NerdQAxe Modern Stand. Need it repaired? D-Central’s ASIC repair team has fixed 2,500+ miners — we support what we sell.
Frequently Asked Questions
What is the NerdQAxe+?
The NerdQAxe+ is a quad-chip open-source Bitcoin solo miner using four Bitmain BM1368 ASIC chips — the same generation of silicon found in the Antminer S21. It delivers 2.4–2.5 TH/s at stock settings while consuming just 50–55W. It is CE certified, runs the open-source AxeOS firmware, and features a 1.9″ color LCD for real-time mining stats. The NerdQAxe+ is the efficiency-optimized evolution of the original NerdQAxe.
How does the NerdQAxe+ compare to the original NerdQAxe?
The NerdQAxe+ is a significant upgrade across the board. It uses BM1368 chips (S21 generation) instead of the original’s BM1366 chips (S19 XP generation), delivering better efficiency (~20 J/TH vs ~23–32 J/TH), similar or higher hashrate (2.4–2.5 TH/s vs 1.7–2.4 TH/s), quieter operation (<25 dBA vs ~40 dB), and lower operating temperatures thanks to a redesigned buck converter. The NerdQAxe+ also carries CE certification.
What are my chances of finding a Bitcoin block?
At 2.5 TH/s against the current network hashrate (~800+ EH/s), your daily probability of finding a block is approximately 1 in 1.4 million. Over a full year of 24/7 mining, your cumulative probability is roughly 0.026%. The odds are long — but every hash is an independent roll of the dice, and the prize is a full 3.125 BTC block reward (~$300,000+ CAD). The NerdQAxe+ is a lottery ticket that costs under $5/month in electricity.
How loud is the NerdQAxe+?
The NerdQAxe+ is the quietest quad-chip miner in the OSMU lineup. In quiet mode, it operates at less than 25 dBA — quieter than a whisper. In normal operation, fan noise is approximately 40 dB, comparable to a quiet desktop computer. The 80mm ThermalRight fan and precision heatsink keep temperatures low without needing aggressive fan speeds. You can run this on your nightstand.
What power supply do I need?
The NerdQAxe+ requires a 12V DC power supply with a barrel jack connector. A 10A (120W) UL-certified adapter is recommended for reliable operation, especially if you plan to overclock. Never use a 5V Bitaxe power supply — the NerdQAxe+ runs on 12V. We carry compatible power supplies in our accessories shop.
Can I overclock the NerdQAxe+?
Yes. The AxeOS web interface allows you to adjust ASIC frequencies and core voltages. Users have pushed the NerdQAxe+ to approximately 3.0 TH/s with proper cooling and a robust power supply. Increase frequency in small steps and monitor temperatures — the over-temperature protection will throttle automatically if things get too hot. The improved thermal design of the NerdQAxe+ gives you more overclocking headroom than the original.
NerdQAxe+ vs Bitaxe GT — which should I buy?
Both deliver roughly 2.1–2.5 TH/s, but they take different approaches. The NerdQAxe+ uses 4x BM1368 chips, is quieter (<25 dBA vs ~35 dB), lighter (270g vs heavier), and has a larger color LCD display. The Bitaxe GT uses 2x BM1370 chips on a compact 120x60mm PCB, is more power-efficient (~18 J/TH vs ~20 J/TH), and uses a 6-layer board for better thermal performance. Choose the NerdQAxe+ for quieter operation and the Nerd-series ecosystem. Choose the Bitaxe GT for maximum efficiency and the smallest form factor. D-Central carries both.
Which mining pool should I use?
For solo mining (recommended), the top choices are Solo CKPool (solo.ckpool.org) — 2% fee, battle-tested infrastructure, multiple confirmed block finds — and Public Pool (web.public-pool.io) — no fees, community-driven, self-hostable. For pooled mining with regular small payouts, Ocean and Braiins are reliable options. At 2.5 TH/s, solo mining is the primary use case — you are hunting for the full 3.125 BTC block reward.
How do I update the firmware?
Open the AxeOS dashboard in your browser (enter the NerdQAxe+ IP address from your router or the LCD screen), navigate to Settings, and upload the latest firmware file. The update takes about 60 seconds. OTA (over-the-air) updates are fully supported — no physical access required. Always use firmware from the official GitHub repository.
Does D-Central offer support and warranty?
Yes. Every NerdQAxe+ sold by D-Central is tested and inspected by our ASIC repair technicians in Laval, Quebec before shipping. D-Central is one of North America’s leading ASIC repair facilities — if your miner needs service, our team has the expertise to diagnose and fix it. We support what we sell, in English and French. Learn about our repair services.
Can I buy a NerdQAxe+ in Canada?
Yes. D-Central Technologies is based in Laval, Quebec and ships the NerdQAxe+ across Canada with fast domestic shipping, CAD pricing, and bilingual support in English and French. No cross-border customs or duties. Every unit is inspected and tested by our ASIC repair technicians before shipping. Visit our shop to order.
What if my NerdQAxe+ needs repair?
D-Central’s ASIC repair team has serviced 2,500+ mining machines since 2016. We work with BM1368 chips daily in our ASIC repair facility. If your NerdQAxe+ develops any issue, our technicians in Laval, Quebec can diagnose and repair it in-house. That is a support guarantee no other OSMU retailer can match.
Supporting Open-Source Mining
The NerdQAxe+ is built on open-source hardware and software under the OSMU (Open Source Miners United) initiative. Every design file, schematic, and line of firmware code is publicly available. No black boxes, no proprietary lock-in — you own the hardware and the knowledge behind it.
$5–$10 from every NerdQAxe+ sold by D-Central goes directly to the OSMU development fund. This money supports the engineers and designers building the next generation of open-source mining hardware — from the NerdQAxe++ to devices that do not exist yet. When you buy from D-Central, you are directly funding the decentralization of Bitcoin mining at the silicon level.
Licensed under open-source terms. Full source code and hardware designs: github.com/shufps/qaxe
Every hash counts.
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