234 TH/s. 15 J/TH. The BM1370 Changes Everything.
The Bitmain Antminer S21 Pro is the flagship of Bitmain's 2024 S21 generation — powered by the BM1370, a chip that delivers nearly double the per-chip output of the BM1368 in the standard S21. With 195 chips across three hashboards, the S21 Pro achieves 234 TH/s at an elite 15 J/TH — 14% more efficient than the base S21 and delivering 34 additional terahashes at roughly the same power draw. For miners who need the best balance of hashrate, efficiency, and price without stepping up to hydro cooling infrastructure, the S21 Pro is the decisive choice.
234
TH/s Hashrate
15 J/TH
Efficiency
3510W
Power Draw
Important — power requirements
This miner requires a dedicated 220–240V AC, 20A circuit. Standard Australian 240V power is compatible, but the S21 Pro needs its own dedicated circuit — the same type used for air conditioners or EV chargers. It uses a C19 power connector (not the C13 used on S19-series miners) — ensure your PDU or power cable is compatible. Contact MinerHub before purchasing if unsure about your electrical setup.
The BM1370 — what makes the Pro genuinely different
The S21 Pro is not a higher-clocked version of the standard S21 — it uses a completely different chip. The BM1370 delivers approximately 1.2 TH/s per chip, nearly double the ~700 GH/s of the BM1368 in the base S21. This means the S21 Pro achieves its 234 TH/s target with just 195 chips versus 396 chips in the 200TH S21 — fewer chips, cleaner power delivery, lower thermal density per chip, and better long-term reliability.
At 15 J/TH, the efficiency advantage compounds over time. Over one year of continuous operation, the S21 Pro saves approximately 4,380 kWh compared to a standard S21 producing the same total hashwork — real, measurable savings on your electricity bill every month.
Where the S21 Pro sits in the full lineup
S21 151TH
Hashrate151 TH/s
Power2643W
Efficiency17.5 J/TH
ChipBM1368
S21 200TH
Hashrate200 TH/s
Power3500W
Efficiency17.5 J/TH
ChipBM1368
S21 Pro ← this unit
Hashrate234 TH/s
Power3510W
Efficiency15 J/TH
ChipBM1370
S21 XP 270TH
Hashrate270 TH/s
Power3645W
Efficiency13.5 J/TH
ChipBM1370
The S21 Pro and S21 XP share the same BM1370 chip. The XP packs 91 chips per hashboard vs 65 on the Pro, giving the XP its 36 TH/s hashrate advantage and 1.5 J/TH efficiency edge — at a significantly higher upfront cost. For most operators, the Pro delivers the overwhelming majority of the XP's value at a more accessible price point.
Supported coins
BTC — Bitcoin
BCH — Bitcoin Cash
BSV — Bitcoin SV
Why the Antminer S21 Pro?
- 234 TH/s SHA-256 — BM1370 5nm chip
- 15 J/TH — 14% better than base S21
- 195 chips — cleaner, lower-density design
- Integrated APW17 PSU — no extra purchase
- 4-fan push-pull air cooling — 24/7 stable
- 220–277V input — AU 240V compatible
- Ethereum connectivity — reliable pool management
- Bitmain web dashboard — real-time monitoring
- 365-day Bitmain factory warranty
- AU warranty + MinerHub expert support
Recommended mining pools
Foundry USA Pool
World's largest BTC pool · FPPS · Low variance payouts
Antpool (Bitmain)
Official Bitmain pool · PPS+ · Seamless S21 Pro support
F2Pool
Strong AU server latency · PPS+ · 2.5% fee
ViaBTC
SOLO / PPLNS / PPS modes · Reliable AU uptime
Full specifications
Technical Specifications
| Specification |
Value |
| Model |
Antminer S21 Pro (234TH) |
| Manufacturer |
Bitmain |
| ASIC chip |
BM13705nm — 195 chips total, 65 per hashboard × 3 boards
|
| Per-chip output |
~1.2 TH/snearly 2× the BM1368 used in base S21
|
| Algorithm |
SHA-256 |
| Hashrate |
234 TH/s±3% variance
|
| Power consumption |
3510W±5% variance at wall
|
| Energy efficiency |
15 J/THat 25°C ambient · saves ~4,380 kWh/year vs S21 200TH
|
| Noise level |
75–76 dBventilated, dedicated space required
|
| Input voltage |
220–277V AC20A dedicated circuit — AU 240V compatible
|
| Power connector |
C19 (20A)not backward-compatible with S19 C13 power cables
|
| Cooling |
Air-cooled — 4 PWM fans (push-pull) |
| Connectivity |
Ethernet RJ45 10/100M |
| Interface |
Bitmain web dashboardaccessible from any browser on the same network
|
| Supported coins |
BTC, BCH, BSVany SHA-256 Stratum V1 pool
|
| PSU |
Integrated APW17built-in, no separate power supply required
|
| Dimensions (L×W×H) |
400 × 195 × 290 mm |
| Net weight |
15.4 kg |
| Operating temperature |
0°C – 45°C |
| Humidity range |
10% – 90% RHnon-condensing
|
| Release date |
July 2024 |
| Bitmain warranty |
365 daysbrand new factory warranty
|
| MinerHub warranty |
AU Warranty support via MinerHub |
Bitcoin mining profitability depends on network difficulty, BTC price, electricity costs, and other market conditions. MinerHub does not guarantee mining returns. All hashrate, power, and efficiency figures are manufacturer-stated typical values (±3–5%). Power requirements: a dedicated 220–240V AC, 20A circuit is required — the S21 Pro uses a C19 power connector, incompatible with C13/C14 cables used on the S19 series. Consult a licensed Australian electrician if needed. 75–76 dB noise level requires a ventilated space away from living areas.
