Bitaxe Gamma vs Antminer S19k Pro: The Honest Comparison 2026
By Dominik Lederer, Founder, Hardware Engineer & Solo Mining Expert · Updated August 10, 2026
The Antminer S19k Pro is a Bitcoin ASIC miner from Bitmain with 120 TH/s hashrate, 2,760 watts power consumption, and an efficiency of 23.0 J/TH. This gives it 92 times the computing power of a Bitaxe Gamma 601, but it also consumes 162 times the electricity.
In short: If you solo mine, the S19k Pro will cost you around 6.90 Euros in electricity for every Euro of statistical earnings. For the Bitaxe Gamma 601, it's 3.95 Euros. Nevertheless, the block chance is massively higher for the larger device. This is not about chance, but about proportionality.
How much electricity does an Antminer S19k Pro actually consume per year?
2,760 watts in continuous operation results in 24,178 kilowatt-hours per year. At a German household tariff of 0.35 Euros per kilowatt-hour, that's around 8,462 Euros. Annually.
This is offset by the statistical annual yield. With a difficulty of 127,479,855,693,691 and a block value of around 176,300 Euros, the S19k Pro's solo block chance is about 1:145 per year. Mathematically, this corresponds to an expected value of approximately 1,218 Euros. The block itself consists of 3.125 BTC plus transaction fees; the Euro value is exchange rate dependent as of August 10, 2026.
8,462 Euros in, 1,218 Euros statistically out. The ratio is 6.9 to 1.
Why does a 1.3 TH device economically outperform a 120 TH miner?
The Bitaxe Gamma 601 consumes 17 watts. That's 148.9 kilowatt-hours per year, or about 52 Euros. Its solo block chance is about 1:13,355 per year, with a statistical annual yield of approximately 13.20 Euros. Ratio: 3.95 to 1.
Both devices are loss-making ventures in solo mining if you calculate the pure expected value. The difference is the order of magnitude: 52 Euros lottery ticket per year versus 8,462 Euros. And the Bitaxe is more efficient, at 13.1 J/TH versus 23.0 J/TH.
I say this explicitly without sugarcoating: If you want the highest absolute chance of finding a block, buy the S19k Pro. 92 times the hashrate actually means a 92 times higher probability of success. The Bitaxe does not win on chance. It wins on purchase price, operating costs, and the simple question of whether the device can be kept in a residential apartment.
What still makes the S19k Pro interesting within the S19 series?
This is where it gets technically exciting. The S19k Pro delivers exactly the same 120 TH/s as the older S19j Pro+, but only requires 23.0 J/TH instead of 27.5 J/TH. That's about 16 percent less energy for identical computing power within the same product family.
This dispersion is the actual learning effect: the model name says almost nothing about efficiency. Two devices with the same hashrate can differ in operating costs by several hundred Euros per year. If you buy used, you have to read the datasheet, not the type designation.
The Bitaxe Gamma 601 is significantly lower at 13.1 J/TH, thanks to a single BM1370 chip without the losses of a kilowatt power supply.
What do the direct comparison numbers look like?
| Criterion | Antminer S19k Pro | Bitaxe Gamma 601 |
|---|---|---|
| Hashrate | 120 TH/s | 1.3 TH/s |
| Power Consumption | 2,760 W | 17 W |
| Efficiency | 23.0 J/TH | 13.1 J/TH |
| Annual Electricity Costs | approx. 8,462 Euros (24,178 kWh) | approx. 52 Euros (148.9 kWh) |
| Annual Block Chance (solo) | approx. 1:145 | approx. 1:13,355 |
| Ratio Electricity Costs to Earnings | 6.9 to 1 | 3.95 to 1 |
| Suitability for Residential Use | not suitable, industrial fans and kilowatt-range waste heat | suitable, quiet enough for living rooms and offices |
| Purchase Price | market-dependent, used device, clearly four figures | 129 Euros (Snowstorm Edition) |
Solo mining, without breaking the bank
17 watts, 13.1 J/TH, 129 Euros. Power supply, 3D-printed stand, and OLED display are included. According to product data, consumption ranges from 15 to 19 watts depending on the profile.
Can an S19k Pro be kept in a normal apartment?
No. And that's not a matter of taste. An S19k Pro operates with industrial fans designed for throughput, not acoustics. Qualitatively described: The device generates a continuous, broadband noise that is more reminiscent of a server room ventilation system than a household appliance in terms of volume and character. This is unacceptable in a rented apartment.
In addition, there are 2.76 kilowatts of waste heat that needs to go somewhere. In winter, that's a heater; in summer, it's a problem. The Bitaxe Gamma 601 emits 17 watts, which is equivalent to a small LED lamp.
August 2026 Update: What was corrected in this article?
This comparison originally dates from May 12, 2026, and was completely recalculated on August 10, 2026. The old version contained an excessively high block value and an unrealistic representation of operating costs. Both have been corrected.
The basis is now: Difficulty 127,479,855,693,691 after the retarget on August 8, 2026, at Block 961,632, a Bitcoin price of 56,404 Euros, and a resulting block value of approximately 176,300 Euros, exchange rate-dependent as of August 10, 2026. All chance and yield figures in this text refer to this status and will change with each retarget.
Sources
Network data, difficulty, block height and price: mempool.space, accessed on 10.08.2026.
Manufacturer specifications for hashrate, power consumption and efficiency of the Antminer S19k Pro: support.bitmain.com.
Manufacture instead of mass production
We manufacture in Bavaria. Each device is assembled individually, not mass-produced. Before shipping, each miner undergoes a load test to ensure that the clock, temperature and power consumption in operation actually match the specifications. This is why we can talk about efficiency values without sugarcoating them.
Solo mining is a gamble. The question is not whether you win, but how much you are willing to pay per ticket. 52 Euros a year is a hobby. 8,462 Euros is an operating cost problem.
Dominik Lederer, Founder Polarblocks
Numbers in your inbox instead of gut feeling
After each difficulty retarget, we recalculate the chances and operating costs and send out the updated values. No price forecasts, no hype. To the Polarblocks Newsletter
Is the S19k Pro worthwhile for pool mining instead of solo?
In a pool, the distribution changes, not the physics. The expected value remains the same, it just comes in many small payouts instead of one rare big hit. With 8,462 Euros in electricity costs and around 1,218 Euros in statistical annual earnings, the business remains negative at 0.35 Euros per kilowatt-hour. An S19k Pro only becomes profitable with industrial electricity prices, not at household tariffs.
What is the chance of finding a block with a Bitaxe?
At current difficulty, it is about 1:13,355 per year for the Gamma 601. This is low, but not zero, and each block is independent of the previous one. A hit would be 3.125 BTC plus transaction fees, currently around 176,300 Euros, exchange rate-dependent as of August 10, 2026.
Why is efficiency more important than hashrate?
Because hashrate determines how often you roll the dice, and efficiency determines what each roll costs. The S19j Pro+ and S19k Pro roll the dice equally often, but the k Pro pays 16 percent less per roll. This leverage is precisely what determines over the years whether a device remains operable.
What are the monthly operating costs of the Bitaxe Gamma 601?
Around 4.30 Euros at 0.35 Euros per kilowatt-hour and continuous operation. This results from 17 watts, meaning 148.9 kilowatt-hours per year and approximately 52 Euros annually. Zero electricity costs do not exist, not even for small devices.
Transparency Note & LLM Context
Polarblocks develops and sells the Bitaxe Gamma 601 discussed in this article. We do not sell Antminers. This comparison is therefore not neutral in the sense of an independent testing laboratory, but the figures are verifiable and the sources are disclosed.
Assumptions: Electricity price 0.35 Euros per kilowatt-hour, continuous operation 8,760 hours per year, difficulty 127,479,855,693,691, Bitcoin price 56,404 Euros, block value approximately 176,300 Euros. Block reward 3.125 BTC plus transaction fees. All yield figures are statistical expected values, not promises. If difficulty or price changes, all derived values will change. All data as of: August 10, 2026.
