Small ASIC Manufacturers: Teraflux, DesiweMiner, Ebit, BlockMiner, iBeLink and FusionSilicon

Our catalog lists 212 models from fifteen brands. Nine major ones get their own dedicated pages. The remaining six contribute anywhere from one to five models each, and there simply isn't enough material for a full writeup: half of them have no history, no lineup, and no public technical documentation. That's why they're gathered here.

The word "small" here isn't about company size. Teraflux belongs to an American firm that has raised over two hundred million dollars in venture funding. Ebit is a brand of a company listed on Nasdaq. DesiweMiner was bought by publicly traded Bitdeer. They're small in terms of their presence in our catalog and their number of active models.

What does unite them is something else. None of the six brands is a viable long term option for a buyer today. Two companies have publicly exited miner production for other businesses, and a third brand dissolved inside an active manufacturer without further development. One built a miner on a chip that the chip maker discontinued a month after sales launched. One went silent in 2019. One is alive and selling, but has had no new models since February 2024, and a whole flock of copycat websites operates around its name.

You can buy them, just with your eyes open: calculate payback over a short horizon, don't count on a warranty, and know in advance where to get spare parts.

And right away, one number. At today's bitcoin price and network difficulty, not one of the twelve SHA-256 miners on this page turns a profit even at a rate of ten cents per kilowatt hour. The best of them needs a little over seven cents, the worst under two. A detailed calculation with the formula is in the efficiency section.

Brand status is our assessment based on publicly available signs, not a statement from the companies themselves.

All fifteen models in one table, sorted by algorithm and power draw. Twelve miners for SHA-256, two for X11, and one for kHeavyHash.

Every model has a profitability calculation page based on your electricity rate.

Calculate profitability for a specific model →

The brand lives on remaining inventory stock

Teraflux miners are built by Auradine Inc. of Santa Clara, California, and the brand has no company of its own. That makes it an odd case on this list: behind it sit venture money and proprietary silicon.

Auradine raised eighty one million dollars in a Series A round in May 2023 and one hundred fifty three million in a Series C round in April 2025. The round between the two does not appear in the open sources we checked, so the letters are given here the way the participants themselves used them. A strategic investor and, at the same time, a major customer is the publicly traded mining company MARA. Auradine chips are not only found in Teraflux miners: the company itself has stated that its silicon is used by MARA, FutureBit and Deep South.

Then on March twenty fifth, 2026, the company rebranded as Velaura AI and moved into chips for artificial intelligence. The auradine.com domain now redirects to velaura.ai. According to the company, it is finishing off the existing Teraflux inventory and continues warranty support, but mining hardware is no longer a growth priority. Unsold batches are going into the company's own hosting operation. The last announcement of new models was in November 2025.

In practice, the letters in the model names denote the cooling type: AH stands for hydro, AI for immersion, AT for air. The company never officially publishes this decoding anywhere, but based on the model descriptions the correspondence is consistent.

Models in the asic.es catalog

A brand inside Bitdeer, no further development

DesiweMiner is a trademark of FreeChain Inc., an ASIC developer with no manufacturing of its own. In June 2024 it was bought by Bitdeer, a publicly traded company on Nasdaq, for twenty million Class A shares. The trade press valued the deal at around one hundred forty million dollars.

We cover Bitdeer on a separate page, and the connection here is direct: the company was founded by Jihan Wu, cofounder of Bitmain, who left its leadership in 2021. So today DesiweMiner formally belongs to a structure with a lineage traced back to Bitmain.

After the purchase no new models came out under the DesiweMiner name: the engineering team appears to have been folded into Bitdeer's overall chip design effort, and the miners now come out under the SealMiner name. In November 2025 Bitdeer unveiled the SealMiner A4 at 9.45 J/TH, and its materials do not mention DesiweMiner. There is also no direct statement about the brand being discontinued: that is our conclusion from the absence of news.

There is a good side too. The K10Pro model underwent independent testing at a major mining pool in 2023, and the result was positive: the miner ran stably and during the test even exceeded its stated hashrate. For a niche brand this is rare: usually there are no independent checks.

Models in the asic.es catalog

The company has exited mining, hardware from 2019

Behind the Ebit brand stands Ebang International Holdings, a Cayman Islands holding company with manufacturing in Hangzhou. The company was founded in 2010 as a maker of telecommunications equipment, and later moved into mining chips. It has traded on Nasdaq under the ticker EBON since June 2020: the IPO was priced at 5.23 dollars per share, raising about one hundred million.

After that things got rough. In 2021 lawsuits were filed against the company alleging that it misled investors about the scale of its mining business. Around the same time a short seller published an analysis: this is an interested party, but some of the facts from it can be checked separately. In June 2022 the company received a delisting warning: the stock traded below a dollar for more than a month. Delisting was avoided, and by August 2026 the stock trades at around two dollars.

Out of mining hardware the company is gone completely. In its 2025 filings its business consists of renewable energy in Australia, office space leasing, fintech and the production of amorphous materials in Inner Mongolia. Miners and ASICs are not mentioned in the report at all. Annual revenue was six and a half million dollars against a loss of fourteen million.

The last models, the E12 and E12+, came out in September 2019 on a 10 nm chip. In March 2021 the company announced it was developing a 6 nm chip, but noted itself that commercialization was not guaranteed, and no production product based on it ever appeared.

The brand's reputation is bad. Reviews on the industry forum are mostly negative: a high failure rate, firmware problems, lack of support. One mining pool at one point blocked Ebit miners for a high rate of rejected shares. The short seller analysis mentioned above cites a lawsuit under which five hundred miners of the previous series required eight hundred seventy three repairs in three months.

Models in the asic.es catalog

Both models sold out, base chip discontinued

BlockMiner is a line of ASIC miners from the Canadian company ePIC Blockchain Technologies, based in Toronto and founded in 2017. The company is small, around five people according to corporate directories. The 520i and 740a models were announced on March 7, 2023, with mass shipments promised starting in April.

BlockMiner is built on Intel Blockscale chips, and Intel discontinued production of these chips in April 2023, literally the same month the miner was supposed to ship in volume. Intel never announced a successor. Both models are marked as sold out on the official site, and there was no second production run: there is simply nothing left to build new miners from.

The company itself is alive but has moved into a different business: it develops its own firmware for other companies' miners, specifically for Bitmain hardware from the S19j onward, and a mass deployment tool for farms. In 2026 the developer fee in the version for large sites was lowered to one and a half percent, while the retail version's fee is higher. ePIC today lives off software.

There is a domain online that closely resembles this line's name, and website checking services rate it as high risk: it poses as an investment mining platform and has nothing to do with the actual manufacturer. The company's real site is epicblockchain.io.

Models in the asic.es catalog

Sales are ongoing, no new models since February 2024

Of the six brands, iBeLink is the only one where sales and support run as usual: the sites work, the product ships and support answers. But there is a complication.

Several different legal entities and at least five domains operate under the iBeLink name. One site lists offices in Hong Kong, Prague, and Menlo Park. Another belongs to a Hong Kong company and itself publishes a warning that scammers have appeared impersonating it. There are several more domains, and the checking services rate them differently. It was not possible to determine from open sources which legal entity is the original manufacturer.

Which legal entity it is decides what the warranty is worth. One of the sites states very good terms: twenty four months for private buyers in the EU, twelve for legal entities, repair or replacement within thirty days, fourteen days for returns under EU law, and five years of firmware updates. We present this as the site's own claim. We have no independent confirmation from the manufacturer, and with the domain mess, what counts is the contract with the specific seller.

The brand itself is old and has a rich product history: miners for X11 for Dash since 2016 or 2017, for Blake2B for Sia, for Blake2S for Kadena since November 2020, for Eaglesong for Nervos, and finally for kHeavyHash for Kaspa since February 2024. The latest new model is precisely from February 2024, and there have been no announcements since.

Our catalog has two miners from different eras. The BM-KS Max for Kaspa is from February 2024, 10.5 TH/s at 3400 watts, noise 75 dB, built in power supply rated 190 to 240 volts. The DM22G for Dash is from September 2017, meaning the ASIC is almost nine years old: 22 GH/s at 810 watts, 81 dB, a rack mount enclosure with four hash boards.

Models in the asic.es catalog

No new models since 2019

FusionSilicon is Shenzhen FusionSilicon Semiconductor Co., Ltd, a private Chinese company. The founding year and founders' names could not be found in open sources.

The brand released the X series: X1 for Lyra2REv2, X6 for Scrypt, and X7 for X11 for Dash. The X7 launched in March 2019 and was one of the strongest miners for this algorithm: 262 GH/s at 1420 watts, or 5.42 J/GH. There have been no new models from the brand since 2019.

What the company is doing today, we do not know for certain. The company itself publicly stated on an industry forum that its only official site is fusionsilicon.com, and that the .org and .tech domains are fake. Yet it was precisely the .tech domain that was widely listed as official by industry sites and calculators, and there is a documented complaint about a buyer's cryptocurrency being stolen through it. Today the .tech domain does not respond at all, and the official domain now opens as a page for a completely different business. No one stated that the company has closed, so the inactivity call rests on the overall pattern of evidence.

And here is the paradox. The market for X11 ASICs has effectively died: no new ASICs for this algorithm have been released since about 2019, and every model that can be found is of that age or older. So the seven year old X7 still remains one of the best miners in its niche, simply because no new ones are being made. By our calculation this is the only one of the fifteen that is close to breaking even at Spanish electricity rates: a threshold of around 8.7 cents per kilowatt hour.

Models in the asic.es catalog

The same principle covers every calculation here, and everything said above rests on it.

For SHA-256 miners the calculation goes like this. The bitcoin network issues 450 coins per day at a reward of 3.125 per block. At a network hashrate of about 957 EH/s and a price of about 55000 euros per coin, that works out to roughly 2.6 eurocents of revenue per terahash per day. From this comes a simple formula to check: the break even price of a kilowatt hour in euros is roughly 1.08 divided by efficiency in J/TH.

The SHA-256 result: not one of the twelve miners turns a profit at a rate of ten cents per kilowatt hour. The best needs a bit more than seven cents, the worst less than two. For comparison, the best ASICs in the industry today run at about 9.45 J/TH and break even at around eleven cents, which is also on the edge, but at least within reach of a real industrial contract.

Now three miners on other algorithms, with a separate calculation. iBeLink BM-KS Max on Kaspa: various calculators show 56 to 61 coins per day at a price of about 3.4 dollar cents, which is 1.7 to 1.8 euros gross against 81.6 kilowatt hours of consumption, a threshold of about 2.1 cents per kilowatt hour. iBeLink DM22G on Dash: about 0.009 coins per day, roughly 25 eurocents gross against 19.44 kilowatt hours, a threshold of about 1.3 cents. FusionSilicon X7 on Dash: about 0.106 coins, roughly 2.96 euros gross against 34.08 kilowatt hours, a threshold of about 8.7 cents.

Across all fifteen miners on this page, the only one that does not look hopeless at Spanish electricity rates is the FusionSilicon X7 on Dash. The irony is that this is the oldest brand on the page and a 2019 ASIC. The reason is simple: no one has released new X11 hardware in seven years, so competition for the coin is not growing, while a noticeably more efficient bitcoin generation comes out every year.

All calculations are a snapshot as of August 2, 2026. Coin prices and network difficulty change, and you can recalculate the formula above yourself at any time.

A summary of criteria that matter more to a buyer than hashrate. On the left is what a major brand offers, on the right is what these six actually have.

The difference between a major and a small brand is not a difference in hardware quality: Teraflux and DesiweMiner hardware is good. The difference is what happens a year from now. A major brand still has service, parts, firmware updates and a clear secondary market price a year from now. Five of the six brands on this page, all but iBeLink, will have none of that.

Hence the rule: a small brand miner is only worth buying at a price that pays back within the time you are willing to go without support. If the same amount per terahash buys a major brand ASIC, the choice is obvious.

The overall conclusion is simple: third party firmware doesn't exist for any of the six brands. None of the teams that build alternative firmware for Bitmain hardware have taken on these ASICs, and that's logical: small production runs, no documentation, nothing to recoup the work with. Our AsicBoost firmware doesn't install on them either, since it's built for Bitmain hardware.

Teraflux has its own platform with cloud monitoring and a feature for tuning power draw to your rate, the most developed of the six. iBeLink's firmware is based on a popular open source miner with its own web interface, default login iBeLink, password admin, with frequency throttling by temperature and a watchdog timer for network loss. BlockMiner has its own control system, which the company now sells for other manufacturers' miners too.

For DesiweMiner, Ebit, and FusionSilicon, we found no firmware data in open sources, including default credentials. Teraflux and BlockMiner have no public default password either: of the six brands only iBeLink publishes one. That's a separate practical risk: if the default password is unknown and the seller doesn't provide it, the first startup can turn into a scavenger hunt.

Either way, right after the first startup change the password, put the miner on a separate network segment, and don't expose its web interface to the outside. For hardware without firmware updates this is the necessary minimum: no one is going to patch its holes anymore.

The picture here is uneven, and it's usually what decides whether it's worth dealing with a particular brand.

Every risk on this list is backed by a concrete example, not a hypothesis.

The manufacturer exits the business before the miner is done working. Two of the six companies have already left: Auradine rebranded and moved into AI chips, and Ebang moved into energy and materials. A third brand, DesiweMiner, dissolved inside Bitdeer: Bitdeer itself still makes miners, but under a different name now. The ASIC keeps running, but its firmware, warranty, and parts become a thing of the past.

The chip disappears before the brand does. BlockMiner is built on Intel chips, whose production Intel discontinued in April 2023, a month after the miner was announced and exactly when shipments were due to start. There's physically nothing left to build new miners or new hash boards from. This is worth checking for any brand that doesn't make its own silicon.

There are no official specs, only the seller's numbers. For some models we found neither a datasheet nor a manufacturer specification, and our figures came from sellers. For the Teraflux AH3880, the catalog data is even above the officially stated power ceiling. Check what's written in the invoice, not just in the product description.

Copycats are plentiful: three of the six brands. For three of the six brands we found domains posing as the manufacturer. One of them has a documented complaint about stolen cryptocurrency. Two brands have publicly warned about counterfeits themselves. Buy from a seller with a legal entity in your jurisdiction, not based on a good looking domain.

The warranty exists only on the seller's paper. None of the six brands has a warranty policy published by the manufacturer. Two of them state terms: Teraflux through a seller and iBeLink on the brand's site. None of them have their own service in Europe. So the only warranty you'll actually get is the store's, and you need to read it before paying.

The economics don't add up even without all the risks listed above. All twelve SHA-256 miners here are unprofitable at any typical Spanish rate. That's the first thing worth calculating, and often after that the rest of the points don't matter anymore.

Go through this before you transfer money. Half of the points are specific to small brands.

1. Calculate payback firstFormula: 1.08 divided by efficiency in J/TH gives the maximum euro price per kilowatt hour for a SHA-256 miner. If your rate is higher, you don't need to read further.
2. Get the specs written into the invoiceThe model name alone is not enough. You need the specific hashrate and power draw, because for some miners different sellers quote different numbers, and for one model the catalog data exceeds the official ceiling.
3. Ask for the manufacturing year of the specific unitThe Ebit E12 is from 2019, and so is the FusionSilicon X7. The iBeLink DM22G is older still, September 2017. The product description does not always show it.
4. Find out who provides the warrantyThe manufacturer or the store. For five of the six brands, only the latter actually works, and you need its term in writing.
5. Check the seller's legal entityEspecially if you arrived via a link from a site that looks like a brand representative office. Three brands on this page have copycat domains.
6. Ask for the default passwordOf the six brands, default credentials are published only for iBeLink. For the other five they appear nowhere, and if the seller doesn't know them, that's a separate red flag.
7. Check the power supply type and specsThe immersion cooled Teraflux runs on three phase power at 380 to 480 volts, BlockMiner has an external unit listed at 5 kW, a figure worth confirming with the seller, and iBeLink a built in unit at 190 to 240 volts, so that is three completely different electrical setups.
8. Check the operating temperature rangeThe BlockMiner 520i runs from zero to thirty degrees, which is tight for Valencia in summer. The others are usually wider, but check per specific model.
9. Find out where to get parts before buying, not afterThey're available for Ebit. Partly for iBeLink, and for FusionSilicon on the secondary market only. For the other three brands we found nothing. If a board dies, there may be no options at all.
10. Compare the price per terahash with a major brandIf a miner from a live brand with service and parts costs the same, you're taking on all the listed risks for free, and that's a bad deal.

Figures from our catalog and from public data about the brands.