It is the most common question a curious home miner asks: a battered used Antminer S9 can be had for the price of a nice dinner, and it churns out roughly ten times the raw hashrate of a brand-new Bitaxe. So why does almost every experienced home miner steer a first-timer toward the tiny single-chip board instead of the cheap industrial workhorse? The honest answer has very little to do with hashrate and almost everything to do with where the machine has to live. At D-Central we have repaired, hosted, and resold both since 2016 — here is the unsentimental breakdown.

The two machines at a glance

These are devices from two completely different eras and design philosophies. The S9 (2016) is a decommissioned data-center miner; the Bitaxe (2023–present) is an open-source hobbyist board built for the home.

Spec	Antminer S9	Bitaxe Gamma (601)
Released	2016 (discontinued; used/refurb only)	2024, in active production
ASIC	189× BM1387 (16nm), 3 hashboards	1× BM1370 (5nm — same generation as the S21 Pro flagship)
Hashrate	~13.5 TH/s	~1.0–1.2 TH/s
Power draw	~1,300–1,400 W	~15–18 W
Noise	~75–85 dB (two screaming 6,000 RPM fans)	Near-silent (one small low-RPM fan)
Power source	Heavy server PSU (APW3++), best on 220–240V	5V DC barrel / USB-C-class brick
Firmware	Closed Bitmain stock (third-party available)	AxeOS — fully open-source
Hardware design	Closed, proprietary	Open-source (schematics + Gerbers public)

Noise: this is the dealbreaker nobody warns you about

An S9 is not loud the way a vacuum cleaner is loud. It is loud the way a small jet on a runway is loud — a sustained 75–85 dB shriek from two high-static-pressure fans that never slow down. It was engineered to run in a warehouse where nobody can hear it. Put one in a bedroom, an apartment, or any room a human occupies and it is genuinely unbearable; people resort to building soundproof boxes (which then trap heat and cook the boards). The Bitaxe, by contrast, runs at a whisper. You can keep a Gamma on your desk while you work and forget it is there. For the vast majority of first-time home miners, this single factor settles the argument.

Power and heat: a space heater vs. a phone charger

At ~1,400 W, an S9 dumps almost exactly the heat of a plug-in space heater into the room, 24 hours a day. In a Canadian winter that can be a feature — it is genuinely useful BTUs — but in summer, or in a small space, it is a problem you will pay to cool back down. It also sits right at the edge of a standard North American 120V/15A circuit (good for ~1,440 W continuous), and Bitmain’s PSU is most efficient on 220–240V, so most owners end up wanting a dedicated 240V outlet. A Bitaxe Gamma sips ~15–18 W — less than a laptop charger — and runs on any wall outlet with a small DC adapter. Over a month of 24/7 operation, the S9 burns roughly $100–$130 of electricity at typical rates; the Bitaxe costs a dollar or two. That gap is the whole story of why one is a learning toy you can leave on forever and the other is a commitment.

Hashrate and the lottery math, honestly

Yes, the S9’s ~13.5 TH/s is about eleven times the Gamma’s ~1.2 TH/s, so on paper it buys you eleven times the lottery tickets. But context matters: against a Bitcoin network now measured in the hundreds of exahash, both machines are astronomically long shots to solo-mine a block. The S9’s better odds are still measured in centuries of expected time, and the Gamma’s are longer still. The difference is that the S9 costs ~75–100× more electricity to buy those extra tickets. Neither device is an income strategy — they are solo-mining lottery tickets, and the only sane way to run either is to point it at a solo pool, leave it on, and treat any block as a happy accident. Framed that way, the Bitaxe is simply the cheaper, quieter ticket you can actually afford to keep running for years.

Sovereignty and learning value

This is where the Bitaxe genuinely pulls ahead, and it is the reason we recommend it as a first miner even though the S9 hashes harder. The Bitaxe is fully open: open hardware (public schematics and board files) and open firmware (AxeOS on an ESP32-S3). You can read every line, flash your own build, watch the stratum traffic, see exactly how a share becomes a submitted block, and understand the machine end to end. It teaches you how Bitcoin mining actually works. The S9 is a closed Bitmain appliance — a brilliant one, and one we have deep respect for, since it is the chip family that put real hashpower in ordinary hands — but it is a sealed black box you operate, not one you learn from. If your goal is to understand mining (or to eventually run your own node-and-miner stack), the Bitaxe is the better classroom.

Repairability

Both are repairable, but at very different skill levels. A dead S9 hashboard means reflow work and BM1387-level chip diagnosis under a microscope — the kind of thing our shop does daily, but not beginner territory. A Bitaxe is a single board with a documented BOM; if a chip or VRM fails, the community and the open design make it tractable to diagnose and fix at the kitchen table, and replacement boards are cheap. For a first-timer, “I can actually fix this myself” is worth a lot — see our Bitaxe repair and diagnostics guide.

So which should you buy?

• Buy a Bitaxe if you live anywhere near where you sleep, want to learn how mining works, value sovereignty and silence, and want a solo-lottery machine you can leave on 24/7 for the cost of a couple of coffees a month. For most home miners in 2026, this is the right answer — start with the Bitaxe Gamma profile and the Bitaxe product page.
• Consider a used S9 only if you have a garage, basement, or detached space where 80 dB and 1,400 W of heat are acceptable, a 240V circuit available, and you want maximum raw hashrate per dollar of hardware — and you are comfortable that the electricity bill, not the purchase price, is the real cost. In a cold climate it can double honestly as a heater.

The S9 earned its legendary status, and we still service them with pride. But for the person asking “what’s a good first miner for my home,” the math, the noise meter, and the power bill all point the same way: the little open-source board wins. If you want to compare full specs side by side, our ASIC miner spec database has both machines and everything in between.

Frequently asked questions

Is a Bitaxe better than an Antminer S9?

For home use, yes — the Bitaxe is near-silent, draws ~15–18W, and is open-source and repairable, while the S9 is a ~1,400W, 75–85 dB industrial miner. The S9 has roughly 11× the hashrate but is impractical in a living space.

Can you run an Antminer S9 at home?

Technically yes, but it is loud (~75–85 dB) and hot (~1,400W), runs best on a 240V circuit, and costs roughly $100–$130/month in electricity — impractical for most homes without a dedicated, ventilated, sound-isolated space.