Bitaxe Gamma vs Supra: Which Single-Chip Solo Miner Should You Buy?

The Bitaxe Supra and the Bitaxe Gamma are the two most popular single-chip solo miners we build, and they get confused constantly. Both are open-source, both fit on a desk, and both let you point a real Bitcoin ASIC at the network on your own terms. But they run different silicon, draw different power, and suit different rooms. This is the honest head-to-head, with every spec checked against our own hardware notes rather than marketing copy.

Standing on the shoulders of giants

Before any comparison, credit where it is due. Neither of these boards is ours to claim. The Bitaxe is an open-source hardware design stewarded by the Open Source Miners United (OSMU) community and the volunteer engineers who reverse-engineered Bitmain’s single-chip mining boards and gave the work away under CERN-OHL-S hardware and GPL-3.0 firmware (AxeOS). D-Central hand-builds, tests, and supports these units from Laval, Quebec — we did not invent them. We are simply careful builders standing on the shoulders of the people who made open silicon mining possible. If you want the full lineage and the rest of the family, start at the Bitaxe Hub.

Bitaxe Supra vs Gamma at a glance

Spec	Bitaxe Supra	Bitaxe Gamma
ASIC chip	BM1368	BM1370
Antminer class / silicon	Antminer S21-class, TSMC 5nm	Antminer S21 Pro-class, TSMC 5nm
Single-chip hashrate	~625–775 GH/s	~1.0–1.2 TH/s
Typical power draw	~12 W	~18–21 W
Best-case efficiency	~16–18 J/TH	~15 J/TH (tuned)
Heat & noise	Lowest — runs cool and quiet	Higher — wants stronger cooling
Starting price (CAD)	from $184.99	from ~$214.99
Best for	Efficiency, quiet rooms, multi-unit fleets	Maximum single-chip hashrate

The chips: BM1368 vs BM1370

The difference between these two boards is, at heart, one chip.

Supra — BM1368 (S21-class, 5nm)

The Supra carries the BM1368, the same generation of Bitmain silicon found in the Antminer S21, built on a mature TSMC 5nm process. In a single-chip Bitaxe it settles around 625–775 GH/s while sipping roughly 12 watts. That low absolute draw is the Supra’s whole personality: it runs cool, stays quiet, and is forgiving about cooling and power. It is the efficient, well-behaved entry point.

Gamma — BM1370 (S21 Pro-class, 5nm)

The Gamma steps up to the BM1370, the chip class behind the Antminer S21 Pro, fabricated on TSMC’s 5nm node — the refined S21 Pro silicon is what lets a single chip cross 1.0–1.2 TH/s — the highest hashrate you can get from one Bitaxe board today — and, when tuned, reach a best-case efficiency near 15 J/TH. The trade-off is honest: it draws more (~18–21 W), runs hotter, and rewards a proper heatsink and fan.

One thing worth saying plainly: more hashrate does not mean meaningfully better solo-mining odds. Against the full Bitcoin network, both boards are lottery tickets. The Gamma is a slightly bigger ticket, not a different game.

Which one should you buy?

Choose the Supra if…

• You care about efficiency and a quiet workspace — it lives happily on a desk, shelf, or bedroom without sounding like a server.
• You want the lowest entry price to learn solo mining and AxeOS.
• You plan to run several units. Lower per-unit power and heat make a small fleet far easier to cool and power than the same number of hotter boards.

Choose the Gamma if…

• You want the most hashrate from a single chip, full stop.
• You are chasing best-case efficiency and are willing to tune and cool for it.
• You would rather run one stronger board than juggle several smaller ones.

Still torn between one big board and several small ones? If raw aggregate hashrate is the goal, also look at the multi-chip designs: the dual-chip Bitaxe GT pushes ~2.15 TH/s at roughly 18 J/TH, and the Bitaxe Hex stacks six chips for the most hashrate in the family. Those are a different conversation, but worth knowing they exist before you decide.

What both boards share

Whichever you pick, you get the same open foundation: open-source AxeOS firmware, a five-minute Wi-Fi setup, solo or pool mining your choice, and a board you actually own and can flash, tune, or repair yourself. Both run the same accessories and cooling ecosystem, and both are covered by the same setup and fix-it resources — start with the Bitaxe troubleshooting guide if you ever get stuck. Full specs, cooling tiers, and firmware notes for the whole line live on the flagship Bitaxe page.

A word on how we operate: we are not Amazon. These are hand-built and tested before they ship from Laval, so a quoted lead time is a craftsman’s estimate, not a same-day promise — that is the cost of a board that arrives configured and working. New units carry the manufacturer warranty; returns are DOA-only, and the details are spelled out in our return and refund policy.

The honest bottom line

If you want efficient, quiet, affordable, and fleet-friendly, the Supra is the right call. If you want the most hashrate a single chip can deliver and you will cool it properly, choose the Gamma. There is no wrong answer — both put real, sovereign, open-source hash under your own roof.

Ready to commit? Compare configurations and order on the flagship Bitaxe product page, or see Canadian shipping and pricing on Buy a Bitaxe in Canada. Free shipping on Canadian orders over $500 CAD, shipped from Laval.

Frequently asked questions

Which Bitaxe is more powerful, the Gamma or the Supra?

The Bitaxe Gamma (Bitmain BM1370, ~1.0–1.2 TH/s) is more powerful than the Supra (BM1368, ~0.7 TH/s) — roughly 1.7× the hashrate, at a better J/TH efficiency.

Is the Bitaxe Gamma more efficient than the Supra?

Yes. The Gamma runs near ~15 J/TH versus the Supra’s ~17 J/TH, though it also draws more total power (~18W vs ~12W). Both use TSMC 5nm Bitmain silicon.

Should a beginner buy the Gamma or the Supra?

The Supra is the lower-cost, lower-power entry point; the Gamma gives the most single-chip hashpower and tuning headroom. Most buyers who want the best performance choose the Gamma.