Nexus S1: The First 3nm Home Miner — 10 TH/s at 100W
Four BM1373 chips harvested from the Antminer S23, ~10 TH/s for ~100 watts, and fully open-source firmware. The specs, the real power cost, how it stacks up against every Bitaxe and NerdQaxe, and what 10 TH/s actually means for solo block odds.
The Nexus S1 is the first home Bitcoin miner built around Bitmain’s brand-new 3nm BM1373 ASIC — and it lands at a number that makes hobbyists do a double-take: roughly 10 TH/s for about 100 watts. That’s industrial-class efficiency in a box that sits on your desk, plugs into a normal wall outlet, and runs about as quietly as a desktop PC.
This breakdown covers what the Nexus S1 actually is, how the BM1373 compares to the BM1370 that powers today’s Bitaxe and NerdQaxe miners, the real power cost of running one, where it sits against the rest of the open-source home-mining lineup, and — honestly — where the marketing numbers and the early real-world numbers diverge.
The headline that matters for home miners: ~100W. That’s the price of a couple of coffees a week in electricity, quiet enough for a living room, and the single biggest reason this machine belongs at home rather than in a garage.
What is the Nexus S1?
The Nexus S1 is a desktop solo miner sold under several brands (Helium Deploy, Bitcoin Merch, PunkHash, BSB Miners, ZC Miner, XC Miner and others), all built on the same reference board: four BM1373 ASICs pulled from the mainboard of Bitmain’s Antminer S23. Where a Bitaxe Gamma is a single-chip teaching tool and a NerdQaxe++ packs four older BM1370 chips, the Nexus S1 is the first widely available quad-chip board to ship the new 3nm silicon.
It’s genuinely plug-and-play: connect power, join your WiFi through the on-board web dashboard, point it at a pool, and you’re hashing. The package includes the stand and the power supply, so there’s nothing else to buy. Warranty is typically 90 days from the seller plus a manufacturer minimum of one year worldwide (up to two years for EU buyers). Price sits around ~$599 depending on the vendor (some list $599–$699).
The BM1373: why 3nm matters for home mining
To understand the Nexus S1 you have to understand the chip. The previous-generation BM1370 — the heart of the Bitaxe Gamma, Bitaxe GT and NerdQaxe++ — comes from the Antminer S21 Pro and delivers roughly 1.2–1.5 TH/s per chip at ~15–17 J/TH. It was already best-in-class for hobby hardware.
The BM1373 is the next step: same family lineage, but fabricated on a 3nm process (down from 5nm) and harvested from the new Antminer S23 board. The jump from 5nm to 3nm isn’t a minor “tick-tock” — it’s a real power-efficiency generation. In practice the BM1373 delivers around a third less energy per terahash than the BM1370, which is exactly why four of them can hit ~10 TH/s while sipping ~100W.
That efficiency is the whole point. For a home miner you don’t have a cooling plant or three-phase power — joules per terahash and thermals matter far more than peak hashrate. The BM1373 wins on both.
Full specifications
| Spec | Nexus S1 |
|---|---|
| ASIC | 4× Bitmain BM1373 (3nm, from Antminer S23) |
| Hashrate | ~10 TH/s (some vendors quote 10.3 TH/s) |
| Power draw | ~100W nominal (XC Miner: 103W) |
| Efficiency | ~10 J/TH (manufacturer claim) |
| Cooling | AXP90 full-copper heatsink with heat pipe |
| Noise | ~50 dB |
| Connectivity | 2.4 GHz WiFi (Ethernet on some variants) |
| Protection | Automotive-grade onboard fuse |
| Firmware | Open-source (AxeOS / ESP-Miner family) |
| In the box | Miner, stand, power supply |
| Price | ~$599 (varies by vendor; some up to $699) |
| Availability | First shipments June 2026 (pre-order) |
| Warranty | 90 days seller + 1 yr manufacturer (2 yr EU) |
Power & consumption: the home-mining sweet spot
This is where the Nexus S1 shines. At about 100W it draws less than a gaming PC or a bright lamp — you can run it 24/7 on any normal outlet without rewiring anything, without a dedicated breaker, and without turning your office into a furnace.
Here’s what ~100W actually costs to run around the clock (2.4 kWh/day, ~72 kWh/month):
| Electricity price | Per day | Per month | Per year |
|---|---|---|---|
| $0.10 / kWh | $0.24 | ~$7.20 | ~$86 |
| $0.15 / kWh | $0.36 | ~$10.80 | ~$130 |
| $0.20 / kWh | $0.48 | ~$14.40 | ~$173 |
| $0.30 / kWh | $0.72 | ~$21.60 | ~$259 |
| €0.25 / kWh (EU avg) | ~€0.60 | ~€18 | ~€216 |
For most households that’s the price of a couple of coffees a week to keep 10 TH/s of always-on lottery hashpower running. Combined with ~50 dB noise and a desktop footprint, this is what makes the Nexus S1 a true home miner rather than a garage-only machine.
Want your exact numbers? Drop your electricity rate and hashrate into the SoloFury solo mining calculator and the profitability tool to see your real running cost and expected return, coin by coin.
Performance & efficiency vs the field
How does it stack up against the rest of the 2026 open-source home-mining lineup? The table below uses stock figures; all of these run open-source AxeOS-style firmware.
| Miner | Chips | Hashrate | Power | Efficiency | Approx. $/TH |
|---|---|---|---|---|---|
| Bitaxe Gamma 602 | 1× BM1370 | ~1.2 TH/s | ~18W | ~15 J/TH | ~$64/TH |
| Bitaxe GT 801 | 2× BM1370 | ~2.15 TH/s | ~43W | ~20 J/TH | — |
| NerdQaxe++ Rev 7 | 4× BM1370 | ~4.8 TH/s | ~70W | ~14.5 J/TH | ~$104/TH |
| NerdOctaxe Gamma | 8× BM1370 | ~9.6 TH/s | ~160W | ~16.7 J/TH | — |
| Nexus S1 | 4× BM1373 | ~10 TH/s | ~100W | ~10 J/TH | ~$60/TH |
Read that last row carefully. The Nexus S1 delivers roughly double the hashrate of a NerdQaxe++ at a better efficiency, and it matches the hashrate of an eight-chip NerdOctaxe Gamma while drawing about 60W less. On a dollars-per-terahash basis it’s among the cheapest ways to put serious hashpower on your desk. For a home miner optimising for “most hashrate per watt and per dollar,” it’s the new reference point.
The honest part: marketing vs early real-world numbers
Every vendor advertises “10 TH/s at 100W, 50% less power than BM1370.” Two things are worth knowing before you buy:
- The efficiency gain over BM1370 is closer to ~33% in practice, not the round “50%” used in marketing. Still a generational leap — just not magic.
- Early units have shown higher real draw. Independent bench testing has reported some first-batch BM1373 boards pulling closer to 140W, with a few aggressive configs hitting ~12 TH/s at ~160W — a sign the BM1373 still has early-stage voltage/frequency stability quirks to be ironed out in firmware.
None of this is a dealbreaker — even at 140W for 10 TH/s (~14 J/TH) it’s competitive with the best BM1370 boards, and open-source firmware tuning tends to improve these numbers over time. But a credible buying decision should use ~10 J/TH as the best case and ~14 J/TH as the conservative case, and budget electricity at ~120–140W if you want a safety margin.
Open-source firmware & the repository
One of the best things about the Nexus S1 is that it’s not a black box. Like the entire Bitaxe / NerdAxe ecosystem, it runs firmware from the AxeOS / ESP-Miner family — open source under the GPL-3.0 licence. You can read every line, build it yourself, and you’re never locked into a vendor’s roadmap.
The relevant repositories:
- Upstream firmware (AxeOS): github.com/bitaxeorg/ESP-Miner — the canonical ESP32-S3 firmware and web dashboard that powers the whole open-source mining scene (1,100+ commits, actively maintained).
- Multi-chip / display lineage: quad-chip boards like the Nexus and NerdQaxe run ESP-Miner forks that add an LVGL display layer and per-board tuning — for example github.com/BitMaker-hub/ESP-Miner-NerdAxe and the NerdQaxe “Nerd*OS” fork. The Nexus S1 sits squarely in this family.
What open-source firmware buys you in practice: a browser dashboard (just open the miner’s IP), live hashrate / temperature / efficiency graphs, a REST API for automation, OTA updates, and the freedom to set any pool and any wallet you want. Community updates have historically unlocked 10–15% more hashrate on existing hardware purely through better tuning — so the device tends to get better after you buy it.
What 10 TH/s really means for solo odds
Let’s be honest about the lottery, because that honesty is the whole point of solo mining. At the current Bitcoin network size (~930 EH/s, difficulty ~139 T heading toward ~125 T after the next retarget), here’s roughly how often each device would find a BTC block on average:
| Device | Hashrate | Avg. time to a BTC block |
|---|---|---|
| Bitaxe Gamma 602 | ~1.2 TH/s | ~14,700 years |
| NerdQaxe++ | ~4.8 TH/s | ~3,700 years |
| NerdOctaxe Gamma | ~9.6 TH/s | ~1,840 years |
| Nexus S1 | ~10 TH/s | ~1,770 years |
Those are statistical averages, not a schedule. Solo mining is a lottery: a block can land on day one or never — the math tells you the long-run rate, not your luck. The Nexus S1 roughly doubles your BTC odds versus a NerdQaxe++ for the same wall outlet, which is real, but on Bitcoin alone it’s still a moonshot.
This is exactly why many home miners point the same hardware at smaller SHA-256 chains. With identical 10 TH/s, your odds of solving a block on a lower-difficulty network — Bitcoin Cash, eCash (XEC) and similar SHA-256 coins — are orders of magnitude better, often days-to-weeks instead of millennia. (Full disclosure: this is the SoloFury blog, and our non-custodial pool lets you solo-mine BTC, BCH, BC2, BCH2 and XEC with the same miner — coinbase paid straight to your own wallet. You change one stratum URL; nothing else changes.)
Not sure which chain to aim at? The SoloFury Network Radar shows live difficulty, retarget countdown and network hashrate for every supported SHA-256 coin, so you can spot the easiest target right now — and the calculator turns that into concrete odds for your exact hashrate.
Setup in three minutes
- Plug in the included PSU and power on.
- Connect to the miner’s setup WiFi, open the AxeOS dashboard in your browser, and join your home network.
- Enter your pool’s stratum URL and your wallet address as the worker, save, and you’re hashing.
No external computer, no command line, no drivers. The dashboard then shows live hashrate, temperature, efficiency and your best share difficulty. New to solo mining? Our step-by-step Bitaxe solo mining guide walks through the entire process from first boot to first share — it applies directly to the Nexus S1, since both run the same AxeOS-style firmware.
Plan your Nexus S1 setup with SoloFury’s free tools
Before you buy or plug in, run the numbers and pick your target with our free, no-signup tools:
- Solo mining calculator — odds, break-even and expected return for your exact hashrate and electricity price.
- Profitability tool — compare expected return across BTC, BCH, BC2, BCH2 and XEC.
- Network Radar — live difficulty, retarget countdown and network hashrate for every SHA-256 coin.
- Bitaxe solo mining guide — the complete step-by-step for first-time solo miners; applies directly to the Nexus S1.
Verdict: who should buy the Nexus S1?
Buy it if you want the most hashrate-per-watt and hashrate-per-dollar available in a quiet, desk-friendly, open-source package — and you’re comfortable being an early adopter of brand-new 3nm silicon. The ~100W consumption is genuinely excellent for 24/7 home operation, and the efficiency lead over BM1370 boards is real.
Wait if you need bulletproof, day-one stability and don’t want to deal with early-firmware tuning — in which case a mature NerdQaxe++ Rev 7 remains a superb, proven choice while the BM1373 firmware matures.
Either way, the BM1373 marks the start of a new efficiency era for home mining, and the Nexus S1 is the first device to put it on your desk.
FAQ
How much power does the Nexus S1 use?
About 100W at stock settings — roughly $7–$15 of electricity per month in most homes. Some early units have drawn closer to 140W, so budget ~120–140W for a safety margin.
Is the Nexus S1 open source?
Yes. It runs firmware from the AxeOS / ESP-Miner family (GPL-3.0). The upstream code lives at github.com/bitaxeorg/ESP-Miner, with multi-chip forks for boards like this one.
How does the BM1373 compare to the BM1370?
The BM1373 is a 3nm chip from the Antminer S23 and is roughly a third more energy-efficient than the 5nm BM1370 used in the Bitaxe Gamma and NerdQaxe++.
What are my odds of finding a Bitcoin block?
At ~10 TH/s and today’s ~930 EH/s network, on the order of once every ~1,770 years on average — a true lottery. Odds are dramatically better on smaller SHA-256 chains like BCH or XEC with the same hardware; run your own numbers in the SoloFury calculator.
How much does it cost?
Around $599 depending on the vendor (some list $599–$699), with the stand and power supply included.
The owl doesn’t burn watts it doesn’t have to. Four 3nm chips, a hundred quiet watts, and a wallet of its own. Small box, real hashpower, your keys.
Point your Nexus S1 at SoloFury
Non-custodial solo mining across BTC, BCH, BC2, BCH2 and XEC. 1% fee. 99% straight to your wallet via coinbase. Low-latency stratum from Atlanta, Frankfurt and Tokyo — and version-rolling (AsicBoost) on every endpoint, so your BM1373 runs at full efficiency.
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