ASICProfit: Siacoin & Blake2B-Sia Mining Guide
Learn how Siacoin and Blake2B-Sia ASIC mining works, why efficiency and electricity matter, and how to compare SC mining hardware and profitability.
Bitcoin dominates many ASIC mining discussions, but SHA-256 is only one mining lane.
Siacoin (SC) represents a different part of the proof-of-work market. Its specialized ASIC hardware operates on Blake2B-Sia, an algorithm built around the Sia ecosystem rather than Bitcoin.
For miners, that distinction matters. A Blake2B-Sia machine cannot simply be evaluated using Bitcoin difficulty, SHA-256 hashprice, or Bitcoin ASIC rankings. It has its own hardware market, network competition, coin price, electricity requirements, and profitability conditions.
ASICProfit currently tracks multiple Blake2B-Sia miners, ranging from compact machines to larger models such as the iBeLink BM-S3+ at 25 TH/s.
So what exactly are Siacoin and Blake2B-Sia, and what should miners check before entering this mining lane?
Siacoin is the native cryptocurrency associated with the Sia decentralized storage ecosystem.
From a mining perspective, the important point is that SC remains a proof-of-work asset with dedicated mining hardware.
Unlike a Bitcoin ASIC, which is built around SHA-256, a Siacoin ASIC is designed for the Blake2B-Sia algorithm.
That specialization creates an important limitation:
A Blake2B-Sia ASIC cannot simply switch over to SHA-256 Bitcoin mining when SC profitability falls.
The hardware investment is therefore closely tied to the economics of the Sia mining ecosystem.
This makes coin price, network competition and hardware efficiency especially important when evaluating an SC miner.
Blake2B-Sia is the proof-of-work algorithm used by dedicated Siacoin mining hardware.
For an ASIC operator, you don’t need to understand every cryptographic operation to understand the economics.
Think of mining algorithms as separate hardware lanes.
An ASIC optimized for one lane generally cannot jump into another.
That means comparing a 25 TH/s Blake2B-Sia machine directly with a 200 TH/s Bitcoin miner based only on hashrate would be meaningless.
A terahash on one algorithm is not economically equivalent to a terahash on another.
The correct comparison happens within the same algorithm and network.
A useful example is the iBeLink BM-S3+.
ASICProfit lists the machine at:
Those specifications immediately tell us more than a daily-profit number.
The machine produces 25 TH/s while drawing approximately 3.4 kW continuously. ASICProfit calculates its rated efficiency at 136 J/TH.
ASICProfit also currently lists several other Blake2B-Sia machines, including the iBeLink BM-S3, iBeLink BM-S1 Max, Goldshell SC6-SE and Goldshell SC5 Pro II.
That gives miners an actual hardware category to compare rather than evaluating one machine in isolation.
Take the BM-S3+ as an example.
Its 3,400 W rated consumption equals:
3,400 W ÷ 1,000 = 3.4 kW
Running continuously:
3.4 kW × 24 hours = 81.6 kWh/day
Now apply different electricity rates:
The hardware and hashrate remain identical.
Only electricity changes.
Yet moving from $0.04 to $0.10/kWh adds approximately $4.90 per day to the operating cost of one machine.
Across 10 BM-S3+ units, that difference becomes roughly $49 per day.
This is why a miner appearing profitable on a ranking does not automatically mean it will be equally profitable for every operator.
This is particularly important right now.
ASICProfit describes its miner rankings as live estimates that are updated frequently, covering more than 200 coins and 25+ algorithms.
Recent crawls demonstrate exactly why that matters.
Different ASICProfit snapshots have shown materially different daily profitability estimates for the BM-S3+, even though its physical specifications remained 25 TH/s and 3,400 W.
That isn’t contradictory to the basic economics of mining.
It illustrates them.
Hardware specifications are relatively fixed. Mining profitability is not.
SC price can move. Network competition can move. Difficulty can change. Electricity assumptions differ. The amount of SC generated by a given amount of hashrate can change.
So a profitability figure copied today should not become a permanent assumption in a six-month ROI calculation.
Suppose Siacoin price rises sharply.
At first glance, that sounds automatically positive for miners because every SC produced has a higher USD value.
But mining economics can react.
If stronger economics encourage additional Blake2B-Sia hashrate to join the network, competition can increase.
That creates a familiar mining cycle:
Coin price rises → mining revenue improves → additional hashrate becomes attractive → competition increases → revenue per unit of hashrate can face pressure.
The reverse can also happen.
This is why looking only at the SC/USD chart isn’t enough to evaluate a Blake2B-Sia ASIC.
Miners need to combine coin price, expected coin production, electricity and hardware efficiency.
ASICProfit’s current SC hardware listings show how different machines can compete on the same algorithm with different hashrate and power characteristics.
For example, the BM-S3+ is listed at 25 TH/s and 3,400 W, while the earlier BM-S3 is listed at approximately 19 TH/s and 3,100 W.
The BM-S3+ therefore produces considerably more rated hashrate for a relatively smaller increase in power consumption.
That is the kind of comparison miners should make.
Don’t ask only:
Which Siacoin miner has the highest TH/s?
Ask:
How much electricity does it require to produce each TH/s?
Efficiency becomes particularly valuable if mining revenue weakens because the lower-cost machine has more room before electricity consumes its gross revenue.
One useful metric is the break-even electricity price.
The simplified formula is:
Daily gross mining revenue ÷ daily electricity consumption = break-even $/kWh
The BM-S3+ consumes approximately 81.6 kWh/day.
Suppose it hypothetically generates $15/day gross:
$15 ÷ 81.6 = $0.184/kWh
At $10/day:
$10 ÷ 81.6 = $0.123/kWh
At $7/day:
$7 ÷ 81.6 = $0.086/kWh
Notice that the ASIC itself never changed.
It remained a 25 TH/s, 3,400 W machine.
But as mining revenue fell from $15 to $7, its electricity-only break-even rate dropped from roughly 18.4 cents to 8.6 cents per kWh.
That’s the number an operator should understand before buying hardware.
Specialized ASICs have an advantage and a disadvantage.
Their advantage is specialization.
Their disadvantage is also specialization.
Buying a Blake2B-Sia ASIC means committing hardware capital to a relatively narrow mining lane.
If Bitcoin SHA-256 economics improve dramatically, the BM-S3+ cannot participate.
If Scrypt mining becomes more attractive, it cannot switch to Litecoin or Dogecoin.
Its economics remain tied to the opportunities available to Blake2B-Sia hardware.
That doesn’t automatically make the investment unattractive. It simply means algorithm exposure belongs in the ROI calculation alongside hardware price and electricity.
Before buying a Siacoin ASIC, start with its rated hashrate, power consumption and efficiency. Then calculate electricity using the rate you will actually pay.
Next, check current SC production and revenue rather than relying on an old profitability screenshot.
Then stress-test the machine.
What happens if revenue drops 10%?
What happens at -20%?
What if your electricity price rises?
How much uptime does the machine need to achieve your expected payback?
Finally, compare several machines operating on the same algorithm.
ASICProfit’s Siacoin miner listings currently provide a useful starting point for comparing Blake2B-Sia hardware.
Siacoin and Blake2B-Sia offer ASIC miners a very different lane from Bitcoin mining.
Instead of SHA-256, operators are dealing with specialized Blake2B-Sia hardware whose economics are tied to SC production, Siacoin’s market value, network competition, electricity and ASIC efficiency.
Machines such as the iBeLink BM-S3+ show how developed this hardware category has become. At 25 TH/s, 3,400 W and 136 J/TH, it offers substantial dedicated Blake2B-Sia computing power.
But the same rule that applies to Bitcoin ASICs applies here:
Hashrate alone does not determine profitability.
Electricity matters.
Efficiency matters.
Network conditions matter.
And the price shown on a profitability calculator today is a snapshot, not a guaranteed future return.
Use ASICProfit to compare Siacoin ASICs, enter your actual electricity assumptions and calculate your ROI now!
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