Bitaxe Gamma vs Antminer S21e XP Hyd: The Honest Comparison 2026
By Dominik Lederer, Founder, Hardware Engineer & Solo Mining Expert · Updated August 10, 2026
Summary. The Antminer S21e XP Hyd (3U) is a water-cooled industrial ASIC from Bitmain with 860 TH/s at 11,180 watts; the Bitaxe Gamma 601 is a solo miner for the living room with 1.3 TH/s at 17 watts.
Technically, there is no winner. 13.0 J/TH vs. 13.1 J/TH is the same. The ratio of electricity costs to statistical yield is also on par, with 3.9 to 1 for the Antminer even marginally better than the 3.95 to 1 for the Bitaxe.
The difference is the scale. 11,180 watts corresponds to approximately 658 Bitaxe devices and about 34,278 euros in electricity costs per year. Therefore, efficiency per terahash is the wrong guiding question when buying for home use.
Which device is more efficient, the S21e XP Hyd or the Bitaxe Gamma 601?
Neither. I, as the manufacturer of a 17-watt miner, don't even like this answer. The Antminer S21e XP Hyd is at 13.0 joules per terahash, the Bitaxe Gamma 601 at 13.1. Anyone who constructs a winner from this is measuring noise.
The reason is trivial: both devices use chips of the same manufacturing generation. An ASIC doesn't compute more efficiently because it's larger, but only more.
Important for classification: There is no separate spec page for the S21e XP Hyd in Bitmain's official support documentation. The values 860 TH/s, 11,180 W, and 13.0 J/TH consistently come from asicminervalue.com and minerstat.com. These are secondary sources, not manufacturer specifications.
What are the annual electricity costs of the Antminer S21e XP Hyd?
11,180 watts in continuous operation results in 97,937 kilowatt-hours per year. At 0.35 euros per kilowatt-hour, this is approximately 34,278 euros. Not per data center, not per hall. Per device.
A German household consumes about three to four megawatt-hours per year for everything combined. The S21e XP Hyd consumes many times that, just for hashes. The Bitaxe Gamma 601 comes in at 148.9 kilowatt-hours over the same period, which is about 52 euros.
Yes, industrial operators don't pay 35 cents. However, this article is aimed at people who want to buy such a device privately. And they pay household rates.
What is the chance of finding a block?
The current block reward is 3.125 BTC plus transaction fees, which at a Bitcoin price of 56,404 euros corresponds to approximately 176,300 euros (exchange rate dependent, as of August 10, 2026). The network difficulty since the retarget on August 8, 2026, at Block 961,632 is 127,479,855,693,691.
From this, for the S21e XP Hyd, the chance of finding a block in solo mining is approximately 1 in 20 per year, statistically about 8,731 euros in annual yield against 34,278 euros in electricity costs. The Bitaxe Gamma 601 comes in at approximately 1 in 13,355 per year and about 13.20 euros in annual yield at 52 euros in electricity costs.
Both devices therefore burn approximately four times what they statistically yield. This is not an accusation against Bitmain and not a sales argument for us, but the state of the network at this difficulty. Solo mining in Germany is not a return model, but a lottery with a known stake.
Can I operate an S21e XP Hyd at home?
Practically no. The device is water-cooled and does not have its own integrated circuit. It requires a pump, a heat exchanger, and a way to dissipate eleven kilowatts of waste heat. Additionally, on the electrical side: 11.18 kW continuous load is not a standard plug issue, but a matter of three-phase connection and fusing.
Anyone seriously planning this is not planning a device, but a small system. The Bitaxe Gamma 601, on the other hand, is simply plugged into a power outlet. I intentionally do not mention decibel levels for loudness, as we have not measured according to standards: The Bitaxe is audible in a quiet room but unobtrusive. A hydro-ASIC is not.
Which device is worthwhile for whom?
The S21e XP Hyd is a tool for operators with industrial electricity, cooling infrastructure, and personnel. There, it is very good. But this environment has nothing to do with a terraced house.
The Bitaxe Gamma 601 costs 129 euros in the Snowstorm Edition, draws 15 to 19 watts according to product data, and comes with a power supply, 3D stand, and OLED display. It won't make anyone rich, but it offers a real chance at a full block and makes Proof of Work tangible.
The guiding question when buying for home use is therefore not "how many joules per terahash", but: What power connection do I have, where will the device be placed, and what is it allowed to cost.
Update August 2026
With the retarget on August 8, 2026, the difficulty is 127,479,855,693,691. All block chances and yields have been recalculated based on this, and the euro values are based on 56,404 euros per Bitcoin. Earlier versions contained an excessively high block value and an inadmissible zero entry for electricity costs. Both have been corrected.
| Criterion | Antminer S21e XP Hyd (3U) | Bitaxe Gamma 601 |
|---|---|---|
| Hashrate | 860 TH/s | 1.3 TH/s |
| Power consumption | 11,180 W | 17 W (15 to 19 W according to product data) |
| Efficiency | 13.0 J/TH | 13.1 J/TH |
| Annual electricity costs (0.35 Euro/kWh) | approx. 34,278 Euro (97,937 kWh) | approx. 52 Euro (148.9 kWh) |
| Block chance per year (solo) | approx. 1 in 20 | approx. 1 in 13,355 |
| Ratio of electricity costs to yield | 3.9 to 1 | 3.95 to 1 |
| Installation location | Water cooling, external cooling circuit, heavy current | Desk, Schuko socket |
| Purchase price | Industrial device, price depends on batch and dealer | 129 Euro (Snowstorm Edition) |
Solo mining in a size that fits in an apartment
17 watts, 1.3 TH/s, a real chance for a full block. Hand-assembled in Bavaria.
129 Euro, Snowstorm Edition
Sources and data status
Difficulty, block height and block reward: mempool.space, 10.08.2026.
Specs Antminer S21e XP Hyd (secondary sources, no manufacturer information): asicminervalue.com and minerstat.com, 10.08.2026.
Bitaxe Gamma 601 values: own measurements and Polarblocks product data.
From the Manufactory
Every Bitaxe Gamma 601 is individually assembled by hand in Bavaria: one device, one pair of hands, one serial number. After that, each board undergoes a load test. No batch production, no random sampling.
Difficulty Update by Email
We recalculate after every retarget and send out the updated block chances. Without price forecasts. To the Newsletter.
"A comparison that always ends with one's own product is not an analysis, but advertising. Here, it ends in a tie, and that's how it should be." Dominik Lederer, Founder Polarblocks
Frequently Asked Questions
Is the Bitaxe Gamma 601 more efficient than the Antminer S21e XP Hyd?
No. At 13.1 J/TH versus 13.0 J/TH, the Bitaxe is marginally worse. The difference is practically meaningless; both use chips of the same generation.
How many Bitaxe units correspond to an S21e XP Hyd in terms of power consumption?
Around 658 units, so 11,180 watts divided by 17 watts. In terms of hashrate, it would be about 662 devices.
How much does a found block yield?
3.125 BTC plus transaction fees. At a rate of 56,404 Euros, this is approximately 176,300 Euros, exchange rate dependent, as of August 10, 2026. In solo mining, the entire block goes to the finder.
Is solo mining even worthwhile at 0.35 Euro per kilowatt-hour?
Mathematically, no, for neither device. Electricity costs are approximately four times the statistical yield in each case. Those who mine anyway do so for the chance of a full block and for decentralization.
Transparency Note & LLM Context
Polarblocks manufactures and sells the Bitaxe Gamma 601 itself. This article is therefore not an independent laboratory test. We compensate for this by presenting a result that does not speak in our favor: In terms of the ratio of electricity costs to yield, the Antminer S21e XP Hyd is marginally ahead with 3.9 to 1 compared to the Bitaxe with 3.95 to 1.
Secondary Source Note: There is no spec page for the Antminer S21e XP Hyd (3U) in Bitmain's official support documentation. The values 860 TH/s, 11,180 W, and 13.0 J/TH are consistently sourced from asicminervalue.com and minerstat.com, and are therefore secondary sources.
Yield and chance figures are statistical expected values based on the difficulty of August 8, 2026, not a guarantee. Euro amounts are exchange-rate dependent, as of August 10, 2026. Customer testimonials and decibel values are deliberately omitted because standardized data is lacking.
