Manufacturer: BITMAIN TECHNOLOGIES INC.
Website: www.bitmain.com
Antminer S21 Imm. Product Manual
Published: Jul. 2024
1. Specification
Product Glance
| Attribute | Value |
|---|---|
| Model | S21 Imm. |
| Version | 10 |
| Crypto algorithm/coins | SHA256|BTC/BCH/BSV |
| Working mode(1-1) | NEM, HEM |
| Typical hashrate, TH/s(1-2) | NEM: 239, HEM: 301 |
| Power on wall @30°C (1-3), Watt(1-2) | NEM: 3824, HEM: 5569 |
| Power efficiency on wall @30°C, J/TH(1-2) | NEM: 16.0, HEM: 18.5 |
Detailed Characteristics
| Attribute | Value |
|---|---|
| Power supply | |
| Phase | 3 |
| Input voltage range, Volt(2-1) | 380~415 |
| Input frequency range, Hz | 50~60 |
| Input max current, Amp | 12 |
| Hardware configuration | |
| Networking connection mode | RJ45 Ethernet 10/100M |
| Server size (Length*Width*Height, w/o package), mm | 293*236*364(2-2) |
| Server size (Length*Width*Height, with package), mm | 570*316*430 |
| Net weight, kg | 17.15 |
| Gross weight, kg | 20.45 |
Environment requirements
| Parameter | Value |
|---|---|
| Inlet oil temperature, °C | 30~55 |
| Oil flow, m³/h | 1 |
| Storage temperature, °C | -20~70 |
Notes
- (1-1) NEM: Normal Energy Mode; HEM: High Energy Mode.
- (1-2) The Hashrate value, Power on wall, and Power efficiency on wall are all typical values. The actual Hashrate value fluctuates by ±3%, and the actual Power on wall and Power efficiency on wall fluctuate by ±5%.
- (1-3) Inlet oil temperature.
- (2-1) Caution: Wrong input voltage may cause server damage.
- (2-2) The height includes a 44mm handle.
2. Performance Curve
(1) Hashrate vs. Inlet Oil Temperature
This graph illustrates the relationship between Inlet Oil Temperature (°C) on the X-axis and Hashrate (TH/s) on the Y-axis for the S21 Imm. miner. Data points are shown for two working modes: NEM (Normal Energy Mode) and HEM (High Energy Mode). In NEM mode, the hashrate is approximately 239 TH/s across the temperature range of 30°C to 55°C. In HEM mode, the hashrate starts at 301 TH/s at 30°C, remains at 301 TH/s until 45°C, and then drops to 278 TH/s at 50°C and 55°C.
(2) J/T vs. Inlet Oil Temperature
This graph shows the relationship between Inlet Oil Temperature (°C) on the X-axis and J/T (Joules per Terahash) on the Y-axis for the S21 Imm. miner. Data points are presented for NEM and HEM working modes. In NEM mode, the J/T value is consistently 16 J/T across the temperature range from 30°C to 55°C. In HEM mode, the J/T value is 18.5 J/T across the entire temperature range from 30°C to 55°C.
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