Significant price hikes on 5090, L40S and Enerperise Blackwell Series GPUs continues into Q1 2026. Please note Credit Card payments will only work if USD or AED currency is selected on top right corner of the website. For US customers; before placing an order for any crypto miners, inquire with a live chat sales rep or toll-free phone agent about any potential tariffs. HGX B200 lead times are now between 8-20 weeks for Golden Sku selections, with custom BOMs exceed 26 weeks. HGX H200 offerings in stock, as well as limited HGX B300. We are now certified partners of Supermicro in both NA and MENA regions.
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✓ Manufacturer: Bitmain
✓ Model: Antminer S21+ Hyd
✓ Hashrate: 358TH
✓ Crypto Algorithm: SHA256
✓ Power on Wall @25°C: 5925W ±5%
✓ Power Efficiency on Wall @25°C: 15.0 J/TH ±5%
✓ Power Supply AC Input Voltage: 200~240V
✓ Power Supply AC Input Frequency: 47~63Hz
✓ Release Date: February 2025
✓ Cooling: Hydrocooling
✓ Dimensions (L x W x H): 410 x 170 x 209 mm
✓ Noise Level: 50 dB
✓ Net Weight: 12.85 kg
✓ Gross Weight: 14.5 kg
✓ Operating Temperature: 5~45°C
✓ Storage Temperature: -20~70°C
✓ Operating Humidity (Non-condensing): 5~95% RH
✓ Operating Altitude: ≤2000m
✓ Requirements: 3-phase 380v input power and a standalone cooling kit (12kw only) which can be found here. Hydro cabinets and containers for larger operations can also be considered.
✓ Warranty: 1 year manufacturer parts or replace
This is a preorder. All sales final. No returns or cancellations. For bulk inquiries, consult a live chat agent or call our toll-free number.
The Antminer S21 Hydro is Bitmain's latest cutting-edge, water-cooled Bitcoin miner, setting a new standard in the industry. Boasting a remarkable hashing power of 395 terahashes per second (TH/s), this miner operates at just 5925 watts, making it one of the most powerful and efficient Bitcoin miners available.
A key feature of the Antminer S21 Hydro is its innovative water-cooling system, which significantly enhances heat dissipation and cooling efficiency. This not only ensures optimal performance but also extends the lifespan of the hardware by keeping temperatures in check. Additionally, the reduced energy consumption translates into lower operational costs, making the S21 Hydro a more eco-friendly option compared to traditional air-cooled miners.
The miner is designed with user convenience in mind, featuring a user-friendly interface that allows for easy monitoring and management of mining operations. With real-time data on hashrate, temperature, and energy consumption, users can stay fully informed and optimize their mining activities for maximum performance.
Overall, the Bitmain Antminer S21 Hydro offers a powerful combination of high performance, energy efficiency, and ease of use, making it an excellent choice for both individual miners and large-scale operations.
For those interested in scaling their mining setups, various cooling solutions are available. These include external cooling units for single miners, server racks accommodating up to four hydro miners, and larger-scale options like the Bitmain Antspace HK3 V6, which can house up to 210 hydro miners for more extensive mining projects.
| Specification | Details |
|---|---|
| Manufacturer | Bitmain |
| Model | Antminer S21+ Hyd |
| Hashrate | 395 TH/s |
| Crypto Algorithm | SHA256 |
| Power on Wall @25°C | 5925W ±5% |
| Power Efficiency on Wall @25°C | 15.0 J/TH ±5% |
| Power Supply AC Input Voltage | 200~240V |
| Power Supply AC Input Frequency | 47~63Hz |
| Release Date | February 2025 |
| Cooling | Hydrocooling |
| Dimensions (L x W x H) | 410 x 170 x 209 mm |
| Noise Level | 50 dB |
| Net Weight | 12.85 kg |
| Gross Weight | 14.5 kg |
| Operating Temperature | 5~45°C |
| Storage Temperature | -20~70°C |
| Operating Humidity (Non-condensing) | 5~95% RH |
| Operating Altitude | ≤2000m |
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