How Long Does a Bitaxe Last? The Honest Lifespan Calculation

By Dominik Lederer, Founder, Hardware Engineer & Solo Mining Expert · August 7, 2026 · 8 min read

How long does a Bitaxe really last?

I get this question more often than any other, and usually, there's a second one behind it: Am I buying a device here that will be electronic waste in two years?

The honest answer begins with an admission. There is no manufacturer specification for the lifespan of a Bitaxe. No MTBF value for the circuit board, no operating hours specified for the BM1370, no failure statistics across the entire open hardware stock. Anyone who gives you a precise year has estimated it. I could do that too. I won't.

Instead, I'll turn the question around. What in this device can even break? A Bitaxe consists of a circuit board, an ASIC under a heatsink, a voltage converter, an ESP32-S3, a display, and a fan. Everything except the fan is solid-state electronics with no moving parts. The fan is the only component that literally wears out, and a reliable number is available precisely for it.

Noctua specifies an MTTF of over 150,000 hours for the NF-A6x15 5V PWM. At 24 hours a day, 365 days a year, that's 17.1 years. The manufacturer's warranty is 6 years. The bearing is an SSO2, the operating temperature range extends from minus 10 to plus 70 degrees, and the motor shuts itself off after one second if the rotor is blocked and then attempts to restart every 2 to 6 seconds.

This number is neither a guarantee nor a prophecy. MTTF is a statistical value from accelerated tests, not a promise for your individual unit. But it is the only tested lifespan specification contained in this casing, and it says something remarkable: the wear part is designed for 17 years.

Which component breaks first?

Based on my support experience: almost never what people expect.

The most common failure doesn't come from the device, but from the power outlet. The Gamma, with the BM1370, has the narrowest voltage window of the entire Bitaxe family. The TPS546 voltage converter expects 4.8 to 5.3 volts at the input, and a power supply that ran fine for years on an Ultra or Supra can trigger a power fault on the Gamma. This is not wear and tear. This is a mismatch that happens on day one just as easily as on day one thousand. I've calculated in detail elsewhere how to choose the right power supply.

After that comes the thermal paste. It dries out, which is chemistry and not a matter of opinion, and the hotter the connection runs, the faster it happens. Solo Satoshi recommends changing it every 12 to 18 months, or every 6 months with heavy overclocking. Cost: a few euros and ten minutes. This is the cheapest way to extend the life of this device.

Only after that comes the fan bearing. And a fan doesn't cost much and can be replaced in five minutes.

Does the ASIC lose hashrate over the years?

Here I have to admit that I don't have a good answer, and I think that needs to be said rather than glossed over.

There is no publicly published degradation curve for the BM1370. No one has measured a fleet of these chips over five years and published the results. What is physically known: electromigration in the interconnects accelerates exponentially with junction temperature, and beyond 90 degrees, leakage current increases so much that thermal runaway becomes possible. A chip that runs for years at 55 degrees ages significantly slower than one that is stuck at 72 degrees at the throttling limit.

What you will observe in AxeOS, however, is something else and is constantly mistaken for aging: the displayed hashrate fluctuates because it is averaged over submitted shares. Plus or minus 15 to 20 percent movement over a day is normal and says nothing about the condition of your chip. If you really suspect something is wrong, go through the troubleshooting in the correct order instead of staring at a number.

And then there's the effect that almost everyone considers to be wear and tear: your chances actually decrease over the years. But that's not due to your device, but because the rest of the network is growing. Difficulty is competition, not rust.

What does a Bitaxe cost over its entire lifespan?

Now it gets uncomfortable, and that's precisely why I'm calculating it.

Let's take the fan's MTTF as an optimistic upper limit: 17.1 years of continuous operation. A Bitaxe with around 17 watts draws 149 kilowatt-hours per year. At the current German price corridor of 31.1 to 35 cents per kilowatt-hour, that's 46.34 to 52.15 Euros per year. Over 17.1 years: 793 to 893 Euros in electricity.

This is offset by the statistical yield. At a difficulty of 126,231,507,121,868 and 1.3 TH/s, the expected waiting time for one's own block is 417,046,303,702 seconds, which corresponds to 1 hit in 13,224 years or an annual chance of 1 in 13,224. A block yields 3.125 BTC plus transaction fees, which, at a rate of 55,820.00 Euros (Kraken, August 7, 2026, 06:11 UTC, exchange rate dependent, CoinGecko counter-check 55,803 Euros) is about 174,400 Euros. The expected value is thus 13.19 Euros per year, accumulated over 17.1 years at around 226 Euros.

793 Euros in costs versus an expected value of 226 Euros. The device does not pay for itself over its lifespan, and anyone who tells you otherwise is selling you a story. The complete derivation of this logic can be found in my expected value calculation, and the running costs in detail in the Bitaxe electricity costs 2026.

What you get for this difference is not an interest rate. It's a chance with unlimited duration, a device you own, and a piece of the network that knows nothing about you without your permission. Whether that's worth 46 Euros a year is up to you. I think: yes. But I tell you with the calculation alongside, not without.

When does a Bitaxe really expire?

The day the economics of this device truly change has nothing to do with a broken fan. It has been in the protocol since 2009.

At block height 1,050,000, the block reward will halve from 3.125 BTC to 1.5625 BTC. The current block height is 961,381 (mempool.space, August 7, 2026). So, 88,619 blocks are missing. With an average block time of 602 seconds, that's about 617 days, or mid-April 2028. Public countdown sites mention April 17 to 19, 2028; the deviation of a few days comes from different assumptions about block time and is normal.

On that day, your expected value will halve. From 13.19 Euros per year, it will become 6.60 Euros, assuming unchanged difficulty and exchange rate. Your electricity costs will not halve with it.

This is not an argument against buying, but against a false expectation. A solo miner is a lottery ticket whose drawing format changes every four years. The counter-effect is the price and transaction fees, and no one knows those in advance, including me. Those who buy today expecting a return are calculating incorrectly. Those who buy today because they enjoy 52,560 draws a year on their own desk are buying the right thing.

"The hardware isn't the expiration date. The halving calendar is. And that's been fixed for seventeen years, while your device only needs a fan." Dominik Lederer, Founder Polarblocks

How to keep your Bitaxe alive as long as possible?

Four things, that's all it takes. All of them take less than an hour a year.

First: Keep temperature under control. The ASIC operates optimally between 40 and 65 degrees, throttles at about 70 degrees, and shuts down at 75 degrees. Solo Satoshi recommends a room temperature of 18 to 24 degrees. Every degree less on the chip is purchased lifespan. If it gets too hot for you, an upgraded cooler helps more than any firmware setting.

Second: Remove dust monthly. A clogged heatsink acts like a blanket. Short bursts of compressed air, hold the fan blade, done.

Third: Renew thermal paste every 12 to 18 months. With continuous overclocking, rather every 6 months.

Fourth: Use a power supply that matches the Gamma. Not the cheapest, but one with stable 5 volts and enough reserve. This is the only one of these four measures that actually costs money, and the only one whose absence truly kills a device.

What is consciously missing from this list: overclocking. It's allowed, it's fun, and I do it myself. But it's the only point where you trade lifespan for hashrate, and this trade should be a conscious decision rather than a default.

How does it compare to the lottery and an industrial miner?

Lifespan is only a meaningful criterion if compared to alternatives. A lottery ticket has a lifespan of exactly one drawing.

	Bitaxe Gamma 601	Traditional Lottery	3,500-W Industrial Antminer
Chances of winning per year	1 in 13,224 for a full block of 3.125 BTC plus transaction fees. The chance continues around the clock, even if you forget it.	1 in 139,838,160 per draw for Eurojackpot. If you don't play, you have no chance, and last week's ticket is worthless.	1 in 64 at 270 TH/s, by far the best odds. However, it comes with a device that simply cannot be operated in a living room.
Running costs in a home office	46 to 52 Euros per year, roughly a streaming subscription. Over 17 years of continuous operation, this totals 793 to 893 Euros.	208 Euros per year with two tips per week, and this money is truly gone after the drawing.	30,660 kilowatt-hours per year, so 9,535 to 10,731 Euros. Plus a heavy-duty power connection and a room you'll never want to enter again.
Drawer risk (boredom factor)	Low. The display shows new numbers every day, and maintenance consists of four actions a year rather than an obligation.	High. Nothing happens between draws, there's nothing to look at and nothing to understand.	Very high, because the device ends up in the basement or back on sale after a week at the latest.
Learning effect & blockchain fascination to touch	High. Difficulty, shares, halving, and electricity costs become concrete on your own device, and each maintenance step explains another component.	None. Marking six numbers teaches no one anything about probability.	Present, but inaccessible. At 75 decibels in the next room, no one voluntarily looks at the dashboard.

Frequently Asked Questions about Bitaxe Lifespan

Will a Bitaxe last 10 years? Possible, but unproven. The only component with a published lifespan specification is the fan with an MTTF of over 150,000 hours, which is 17.1 years of continuous operation. There are no manufacturer specifications for the PCB, ASIC, and voltage converter. Realistically, thermal paste and the fan will need to be replaced within this period.

Does a Bitaxe have to run 24/7? No. Every hour of shutdown proportionally reduces your expected value and proportionally saves electricity, and with an expected value of 13.19 euros versus 46 to 52 euros in electricity costs per year, shutting down is even a small mathematical plus. However, those who mine solo do so precisely because of the continuous chance.

Will the Bitaxe lose its purpose after the 2028 halving? It will lose half of its expected value in BTC, assuming difficulty and price remain the same. What it will not lose: its function as an independent network participant and the chance of a whole block. Whether the price will offset the effect, nobody knows.

How often do I have to replace the fan? According to the datasheet, statistically not at all within 17 years. In practice, you'll notice it by the noise long before it stops: a bearing that starts to grind becomes audible. I measured how a healthy device sounds in the volume test.

Is a repair even worth it? For a device starting at 129 euros, whose typical repair consists of a fan or some thermal paste, almost always. That's precisely why we build with standard parts.