iBeLink BM-S3 Plus (25 TH/s)

The iBeLink BM-S3 Plus (25TH) is an air-cooled Blake2b-Sia ASIC miner rated at 25 TH/s for 3400 W, released in April 2025. That works out to 136 J/TH, the best efficiency of any Blake2b-Sia miner in the MinerCompare list and the top of the iBeLink BM-S range. It mines Siacoin (SC) and BTCB2, the Bitcoin fork that moved to the same hash, so one machine can be pointed at either coin, and MinerCompare shows whichever pays more at your electricity rate. Hashrate and power are quoted with a tolerance of roughly 5 percent, so real efficiency can sit slightly on either side of the rated figure. This is an industrial-class machine, not a desktop device: at 3400 W it draws about 15 A at 230 V and runs at around 75 dB. It suits operators with cheap electricity, a proper power feed and a space built… for noisy hardware, and it is the machine to look at when energy cost per terahash decides the result.

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The BM-S3 Plus measures 340 x 190 x 293 mm and weighs 14 kg, a compact, heavy block for 25 TH/s. It runs on 190-240 V mains and connects through Ethernet only, with no Wi-Fi. Cooling is by air, and the noise level of about 75 dB means it belongs in a garage, workshop or dedicated mining room rather than a living space; hearing protection is sensible for anyone working next to it. The rated operating range is 5-40 °C at 10-90 % humidity. Keep the intake air cool and dry and give the exhaust side free space, because the machine turns almost all of its 3400 W into heat. Plan a dedicated circuit with a suitable breaker and cable, and check that your supply can carry the load before you order. Within the family, the BM-S3 (19TH) is the nearest sibling at 163 J/TH, while the BM-S1 and BM-S1 Max… are older and clearly less efficient. The Plus is the pick if you want the lowest power cost per terahash on Blake2b-Sia.

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