ASICProfit: iBeLink BM-S3+ Review: 25 TH/s SC Miner
Explore the iBeLink BM-S3+ with 25 TH/s hashrate, 3,400W power use and 136 J/TH efficiency for Blake2B-Sia and Siacoin mining.
ASIC mining is not limited to Bitcoin. Specialized machines also compete on alternative proof-of-work networks, and the iBeLink BM-S3+ is a good example of what a modern Siacoin-focused ASIC looks like.
Released in April 2025, the BM-S3+ is designed for the Blake2B-Sia algorithm, delivering a rated 25 TH/s while consuming approximately 3,400W. ASICProfit currently lists Siacoin (SC) as its mineable coin.
That makes this a very different proposition from buying a SHA-256 Bitcoin miner. The BM-S3+ gives miners exposure to a specific algorithm and network, so profitability depends heavily on Siacoin’s market price, network conditions and your electricity rate.
Let’s break down the numbers.
The headline figure is 25 TH/s, but hashrate alone doesn’t tell us whether an ASIC makes sense.
Power consumption and efficiency matter just as much.
ASICProfit calculates efficiency at 136 J/TH, while other current specification databases report the same rated figure. The machine uses Ethernet connectivity and is designed to operate between approximately 5°C and 40°C.
You can view its current specifications and live estimates directly on the iBeLink BM-S3+ ASICProfit page.
A 3,400W ASIC is effectively a continuous 3.4 kW load when operating at rated power.
The difference between $0.04 and $0.10/kWh is almost $4.90 per day, or roughly $147 per 30 days, for exactly the same machine.
ASICB independently calculates the BM-S3+’s daily consumption at approximately 81.6 kWh and a $6.53 daily electricity bill at $0.08/kWh.
This is why an ASIC’s profitability should always be calculated using the electricity rate where it will actually operate.
Here is where the BM-S3+ becomes especially interesting.
At the time ASICProfit’s individual miner page was crawled, it estimated approximately $20.81/day in gross income, with $3.26 of electricity and around $17.54/day in estimated profit under the electricity assumption displayed by the page.
However, ASICProfit’s broader miner listings have shown materially different BM-S3+ profitability estimates at different snapshots.
That isn’t a reason to ignore a profitability calculator.
It’s exactly why miners should use one.
ASIC revenue changes as coin prices, network difficulty, hashrate and other variables move. A profitability figure should therefore be treated as a live estimate, not a fixed earnings promise.
Check the latest result before making a purchase or operating decision rather than relying on the number quoted in this article.
The previous iBeLink BM-S3 provides a useful reference point.
ASICProfit lists the older BM-S3 at approximately 19 TH/s and 3,100W, while the BM-S3+ increases rated output to 25 TH/s at 3,400W.
That means the Plus model adds about:
6 TH/s more hashrate, or roughly 31.6% more relative to 19 TH/s.
Yet rated power rises from approximately 3,100W to 3,400W, an increase of only about 9.7%.
The efficiency difference is even clearer. A current hardware profile places the BM-S3+ at 136 J/TH, while the older BM-S3 is approximately 163 J/TH.
That illustrates an important ASIC principle:
More power consumption does not necessarily mean worse efficiency.
The relevant question is how much hashrate you receive for that electricity.
The BM-S3+ is not a general-purpose cryptocurrency miner.
ASICProfit identifies its algorithm as Blake2B-Sia and currently associates it with Siacoin (SC).
You cannot look at the economics of Bitcoin SHA-256 mining and assume they apply to this machine.
That’s both a limitation and part of the reason specialized ASICs exist.
If Siacoin mining conditions become highly favorable, specialized hardware can benefit. But if SC price or mining economics deteriorate, the operator doesn’t have the flexibility to simply point this ASIC at Bitcoin.
Algorithm exposure should therefore be considered alongside hashrate, efficiency and electricity.
The specifications make this questionable for many normal residential environments.
The BM-S3+ is rated around 75 dB and uses air cooling. It also requires 190–240V input power and continuously consumes around 3.4 kW at its rated specification.
That means potential operators should think about more than the electricity bill.
There is also heat removal, ventilation, electrical capacity and noise.
At 3.4 kW, nearly all the electrical energy consumed eventually becomes heat in the surrounding environment. A single machine therefore represents a substantial continuous thermal load.
Before buying one, verify that your electrical circuit, ventilation and cooling setup can safely support continuous operation.
One useful way to evaluate the BM-S3+ is to ignore today’s profit figure for a moment and calculate its break-even electricity price.
The formula is simple:
Daily gross mining revenue ÷ 81.6 kWh/day
For illustration, suppose the machine generates $15/day gross.
$15 ÷ 81.6 = approximately $0.184/kWh
At $10/day gross:
$10 ÷ 81.6 = approximately $0.123/kWh
At $7/day:
$7 ÷ 81.6 = approximately $0.086/kWh
Notice what happens.
The ASIC itself hasn’t changed. It is still producing 25 TH/s and consuming around 3,400W.
But as mining revenue changes, the electricity price the machine can economically tolerate changes with it.
That is why live calculations matter.
The BM-S3+ makes the most sense to evaluate for miners who specifically want Blake2B-Sia and Siacoin exposure, have suitable 190–240V infrastructure, can manage an air-cooled 3.4 kW machine, and have a competitive electricity rate.
It is less compelling for someone simply searching for the “most profitable ASIC” without considering algorithm concentration.
Profitability rankings can change quickly.
A better comparison considers hardware price, TH/s, J/TH, electricity, algorithm, network conditions and expected operating life together.
ASICProfit tracks live estimates across more than 200 coins and 25+ algorithms, making it possible to compare the BM-S3+ against other current ASIC options rather than evaluating it in isolation.
The iBeLink BM-S3+ is a specialized Siacoin mining machine with a straightforward hardware proposition: 25 TH/s, 3,400W and approximately 136 J/TH on Blake2B-Sia.
Its improvement over earlier Siacoin ASIC hardware is meaningful, but specifications alone don’t determine whether buying one makes financial sense.
Electricity is the first major variable.
At $0.04/kWh, rated power costs about $3.26 per day. At $0.10/kWh, the same machine costs $8.16 per day to power.
Then comes the bigger variable: mining revenue.
SC price, network competition and mining conditions can change what 25 TH/s earns, sometimes quickly. That’s why the profitability displayed today should never be mistaken for a guaranteed return tomorrow.
Before purchasing the BM-S3+, calculate it using your electricity price, stress-test weaker revenue scenarios, and compare its ROI with other ASICs.
Check the iBeLink BM-S3+ on ASICProfit and calculate your ROI now!
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