Overclocking Bitaxe: The Honest Guide to More Hashrate in Your Living Room

By Dominik Lederer · Founder, Hardware Engineer & Solo-Mining Expert · July 5, 2026 · Reading time: approx. 7 minutes

Sunday evening, 10:40 PM. A display glows on the desk, a number appears in the browser: 625 MHz. A click on "Save", the fan breathes briefly, and the hashrate climbs. No wrench, no fumbling with warranty seals, no cloud asking for permission. Overclocking a Bitaxe is chip tuning for people who would never lower their car – and it's the moment when a device becomes a hobby.

But I'm not writing this text to persuade you to tweak the settings. I'm writing it because there's an astonishing amount of nonsense circulating in forums on the topic: from "it immediately voids the warranty and burns out" to "everyone can achieve 1.8 TH/s, just increase the voltage." Both are wrong. The truth, as is often the case, has decimal places.

What does overclocking really achieve with a Bitaxe?

Objectively speaking: Our setups run at around 1.3 TH/s with about 17 watts ex-works. With increased frequency and core voltage – the community has settled on 625 MHz and 1,250 mV as a solid target – the integrated BM1370 chip delivers approximately 1.5 TH/s at around 20 watts. That's a good 15% more computing power.

The American Bitaxe retailer Solo Satoshi has documented the values across models: "At 625 MHz and 1,250 mV, the Gamma achieves 1.5 TH/s at 20 watts" – a statement that matches our own measurements at the workbench. However, a prerequisite is always cooling that can dissipate these three additional watts. On the tiny die of the BM1370, three watts are not a footnote.

And yes, it can go even higher. With water cooling and voltages beyond 1.4 volts, enthusiasts have broken the 1.8 TH/s barrier. But that's Formula 1, not commuter traffic. For operation on a bookshelf – where a Bitaxe Home Solo Miner belongs – the range up to about 1.5 TH/s is the corridor where effort, noise, and risk are in a reasonable balance.

How do I overclock my Bitaxe in AxeOS – step by step?

The beauty of AxeOS: everything happens in the browser, nothing is permanent. A failed setting costs you a restart, not hardware.

Step 1 – Note down the initial situation. Open the IP address of your Bitaxe in the browser and write down three values: current hashrate, chip temperature, power consumption. Without a baseline, tuning is just guesswork.

Step 2 – Increase frequency in small steps. Under settings, you'll find frequency and core voltage. Increase the frequency in 25 MHz increments. Don't jump. Each step should be observed for at least an hour.

Step 3 – Only adjust voltage if necessary. If the hashrate becomes unstable or hardware errors appear, the chip lacks voltage. Increase moderately, up to a maximum of 1,250 mV, as long as you're using air cooling. More voltage means disproportionately more waste heat – physics is non-negotiable.

Step 4 – 24 hours of continuous operation. A setting that lasts an hour is a candidate. A setting that lasts a day is a result. Keep two temperatures in mind: the ASIC (ideally 50–60 °C) and the voltage regulator.

Step 5 – If problems arise: take a step back. By definition, the sweet spot is the step below the first unstable one. Those who accept this have understood the principle. Those who don't will eventually buy new hardware.

What power supply do I need for overclocking?

Here, a matter of comfort becomes a matter of safety. The Bitaxe needs a stable 5 volts, and a power supply operating continuously at its load limit will get hot, become unstable – and in the worst case, become a fire hazard. The rule of thumb from power supply design also applies here: continuous load should be well below the nominal power.

Specifically, this means: For normal operation at around 17 watts, a clean 25-watt power supply is sufficient. If you lightly overclock, going towards 20 watts, a 30-watt nominal power supply will run smoothly. And if you want to seriously tune – higher voltage, larger cooler, summer operation – take a 50-watt power supply right away and you'll have the issue off the table forever. We have all three stages in our assortment, not for sales logic, but because a €15 power supply at its limit is the dumbest place to save money in the whole setup.

When does overclocking become dangerous with the Bitaxe?

Time for the honest chapter. The chip itself is surprisingly forgiving – it throttles before it dies. The weakest link is the voltage regulator (VR), the small component that converts your 5 volts into the core voltage for the ASIC. For the Gamma, there's a clear line in the community: a VR temperature consistently above 70 °C is the warning zone. It's not the processor that ages there; it's the power supply – and that fails without warning.

Therefore, my uncomfortable advice: if you want to consistently exceed 625 MHz, you should first invest in cooling and only then in ambition. A larger heatsink with heat pipes and a quiet 60mm fan not only lower the chip temperature, but also dissipate heat from the VR area. That's exactly what we built our upgrade kits for – the Ultimate variant is designed for operation beyond 2 TH/s, yet remains quiet enough for the living room. Overclocking remains your risk, not ours: it's an alteration of factory settings, and whoever undertakes it should know why.

"Overclocking isn't a profit lever. It's the cheapest entry ticket into semiconductor physics I know – three watts of learning money a year for an understanding that no ETF savings plan will ever teach you."
— Dominik Lederer, Founder Polarblocks

Is overclocking financially worthwhile – honestly calculated?

Let's calculate it without marketing fluff. Assumptions: 24/7 operation, German household electricity at €0.35/kWh, network hashrate around 1.1 Zettahash per second (as of July 2026).

Out of the box, the miner draws 17 watts: that's 149 kWh per year, about €52 in electricity costs. Overclocked to 20 watts, this becomes 175 kWh, about €61 – additional costs of around €9 per year. For that, your hashrate increases by a good 15%. Bitcoin pays out an average of 6 blocks per hour, so 6 × 24 × 365 = 52,560 blocks per year. With 1.5 TH/s, the theoretical chance of finding a block is about 1 in 14,000 per year, with 1.3 TH/s it's about 1 in 16,100. Not a business model. But a better lottery ticket for nine euros – and the ticket doesn't expire, it just keeps hashing.

For comparison, it's worth looking at the alternatives typically offered:

My conclusion is unspectacular, and that's on purpose: Overclock if the technology appeals to you – not because you think you'll get rich from it. The 15% more hashrate won't change your life. But the journey to get there will change how you understand this machine. And understanding has always been the better return.