Bitmain Antminer S21 (200Th) Antminer S21 200T

200 TH/s SHA-256 at 3,550W wall draw and 17.5 J/TH efficiency on Bitmain's BM1368 5nm chip architecture. ±3 percent hashrate and ±5 percent power tolerance per Bitmain official specification. Released February 2024. This is the base tier of the S21 generation hierarchy that also includes the S21 PRO (234 TH/s), S21+ (235 TH/s), and S21 XP (270 TH/s).

The S21 PRO delivers 234 TH/s at 3,510W and 15 J/TH for $3,083, while the base S21 delivers 200 TH/s at 3,550W and 17.5 J/TH for $1,402 used or $1,755 Plug and Play. The PRO produces 17 percent more hashrate at 17 percent better efficiency for 76 to 120 percent more CapEx. At $0.08 per kWh, the S21 base produces +$0.75 daily profit versus the PRO at +$1.87 daily. The PRO daily profit advantage pays back its CapEx premium over the S21 base in approximately 3.2 to 4.1 years. For shorter deployment horizons or operators with cheap electricity, the base S21 wins on CapEx efficiency. For longer deployments or expensive electricity, the PRO efficiency compounds to meaningful savings.

The S21 XP delivers 270 TH/s at 3,645W and 13.5 J/TH for $4,051, while the base S21 delivers 200 TH/s at 3,550W and 17.5 J/TH for $1,402 used or $1,755 Plug and Play. The XP produces 35 percent more hashrate at 23 percent better efficiency for 131 to 189 percent more CapEx. At $0.08 per kWh, the S21 base produces +$0.75 daily profit versus the XP at +$3.81 daily. The XP is the premium option with substantially better economics at any electricity rate. The base S21 is the budget entry point. Buyers comparing them make an explicit CapEx versus OpEx trade off: save $2,296 to $2,649 per unit acquisition cost on the base S21, but accept approximately $3 less daily profit per unit.

200 to 240V AC single phase at 20A maximum current via P13-C20 power cord. At 3,550W the unit draws approximately 16 amps continuous at 220V. Compatible with 220V residential outlets used for electric dryers and ovens, 240V commercial service, or industrial 220 to 277V service. Requires dedicated 20A circuit. Commercial 220V+ circuits required for deployment. Verify electrical service at the deployment site before purchasing if 220V is not already available.

Used at $1,402.23 is $352 cheaper than Plug and Play Ready at $1,755, a 25 percent premium for the verified configuration. Used units may have cosmetic wear, potentially reduced remaining warranty, and should be inspected before production deployment. Plug and Play Ready units are tested and verified for immediate deployment with the full 365-day Bitmain factory warranty. For buyers with technical expertise willing to inspect hardware, verify hashrate stability, and potentially refurbish components, the Used option produces $7.01 per terahash acquisition cost. For buyers prioritizing immediate deployment with full warranty coverage and minimum technical friction, Plug and Play Ready at $8.78 per terahash is the safer path.

Profitable at industrial and low residential electricity rates, marginal at typical residential rates. MillionMiner calculator at $0.08 per kWh shows +$0.75 daily profit, +$22.50 monthly, +$274 annually. Mining Now at $0.07 per kWh shows +$1.23 daily, +$36.90 monthly, +$448.95 annually. At $0.05 per kWh industrial hosting rates: approximately +$2.78 daily, +$83 monthly, +$1,014 annually. Break even electricity rate at current Bitcoin pricing is approximately $0.085 per kWh. Payback at Used pricing and $0.08 per kWh is approximately 5.1 years; at $0.05 per kWh approximately 1.4 years. The S21 base is positioned for CapEx-efficient deployment at industrial electricity access, not for profit maximization at residential rates.

Sí. BraiinsOS+ soporta toda la serie S21, incluyendo el modelo base. El firmware ofrece ajuste automático que optimiza automáticamente el voltaje y la frecuencia del chip para una eficiencia objetivo, datos de rendimiento por chip, gestión avanzada de pools y monitoreo integral. Los operadores que utilizan BraiinsOS+ en hardware S21 suelen lograr mejoras de eficiencia del 2 al 5 por ciento en comparación con el firmware original de Bitmain, llevando el S21 de 17.5 J/TH hacia 16.5 a 17 J/TH. El firmware Vnish es otra opción de terceros. El ecosistema de firmware de Antminer es el más desarrollado en la industria de minería ASIC, con amplia documentación y soporte comunitario. Tenga en cuenta que instalar firmware de terceros puede afectar la cobertura de la garantía del fabricante.

75 dB from four cooling fans at peak operation. Standard industrial ASIC noise comparable to a vacuum cleaner or busy restaurant. Same noise profile as the S21 PRO, S21 XP, S23, and most current generation air cooled Bitcoin miners. Requires dedicated mining space: warehouse, shipping container, garage with sound isolation, dedicated outbuilding, or professional hosting facility. Not suitable for shared residential spaces, apartments, or offices with neighboring occupants. Fan RPM and therefore noise scales with ambient temperature: deployment in hotter environments produces higher noise as fans work harder to maintain chip temperatures.

400 x 195.5 x 290 mm miner dimensions at 13.5 kg net weight. Standard Antminer chassis format compatible with existing S19 and S21 series rack configurations and mining shelves. Single person handling with appropriate lifting technique. Fits standard 4U rack mount configurations or open mining shelving without specialized hardware. Packaged shipping weight approximately 17 kg including PSU and packaging materials.

5 to 45 degrees Celsius ambient operating range at 5 to 95 percent humidity tolerance per Bitmain official documentation. Operating temperature maximum decreases by 1°C per 300 meter elevation increase above 900 meters per Bitmain's altitude guidance. For deployment in hot climates such as the UAE, Texas summer, Arizona, or tropical regions, ambient cooling infrastructure must hold intake air below approximately 40°C at peak load to maintain consistent hashrate. Fan RPM increases substantially as ambient temperature approaches the 45°C upper limit, raising noise and reducing component lifespan.

All SHA-256 proof of work cryptocurrencies. Bitcoin (BTC) is the primary target. Bitcoin Cash (BCH), Bitcoin SV (BSV), eCash (XEC), Fractal Bitcoin (FB), and other SHA-256 chains are also mineable. AuxPoW merged mining is available through compatible pools such as RSK (Rootstock) alongside Bitcoin, providing supplementary rewards at zero additional hashrate cost. Most operators mine Bitcoin directly at major pools for maximum revenue stability. Alternative SHA-256 chains occasionally deliver higher per-hashrate revenue during specific market conditions, making pool-switching strategies viable for operators with flexible configurations.

Yes. The S21 ships with an included PSU sized for the 3,550W rated load, along with the P13-C20 power cord. Box contents per MillionMiner: Antminer S21 unit, power supply unit (PSU), power cables, and quick start guide. Contents may vary by batch, with exact items listed in order confirmation. The included PSU eliminates external power brick sourcing decisions and connector compatibility concerns. PSU inclusion may vary between Used and Plug and Play Ready configurations; verify at purchase if running a multi-unit deployment plan.

Standard Antminer setup. Step one: verify 220 to 240V electrical circuit with 20A capacity at the deployment location. Step two: connect the included P13-C20 power cord to the integrated PSU and plug into the 220V+ outlet. Step three: connect Ethernet cable to the router or network switch. Step four: find miner IP through Bitmain IP Reporter software, router DHCP assignment table, or network scanning tool. Step five: open the Antminer web interface in a browser, login with default root/root credentials (change immediately for security), configure SHA-256 pool URL and BTC wallet address. Step six: verify hashrate stabilizes at approximately 200 TH/s within 10 to 15 minutes of startup.

Cada gran grupo de minería SHA-256 admite el S21: Foundry USA, AntPool, F2Pool, ViaBTC, Braiins Pool, Luxor, OCEAN, SpiderPool, EMCD y todos los otros pools compatibles con SHA-256. Protocolo estándar Stratum sin restricciones de hardware en la selección del pool. Las tarifas del pool generalmente oscilan entre 0 y 3 por ciento de los ingresos, dependiendo del modelo de negocio del pool. NiceHash soporta el S21 para los vendedores del mercado de alquiler de hashrate que prefieren rentar ingresos en lugar de recompensas directas por minería. Verifique las especificaciones del pool antes del despliegue, incluyendo los umbrales mínimos de pago, la precisión en la declaración del hashrate y cualquier requisito mínimo de hashrate.

365-day Bitmain factory warranty on brand new Plug and Play Ready units, among the longest warranties in the ASIC mining industry. Most competing manufacturers offer 180 days. Warranty covers manufacturing defects and hardware failures under normal operating conditions. Tampering with the warranty seal, use of incompatible PSU, exceeding rated voltage input, or physical damage from shipping voids coverage. Used configuration warranty terms vary depending on the unit's remaining factory warranty period and distributor policies; verify at purchase with MillionMiner. Warranty claims processed through MillionMiner support with direct Bitmain channel escalation as needed.

Standard air cooled Antminer maintenance. Quarterly dust cleaning of the four fan intakes and rear exhaust prevents thermal throttling and premature fan bearing wear. Annual fan bearing inspection with replacement if bearing noise develops. Monitor hashrate continuously through the Antminer web interface or BraiinsOS+ dashboard. Bitmain's S21 platform has two years of field reliability data as of April 2026 with no known systemic reliability issues. For Used unit operators, add initial inspection of chassis for signs of thermal stress, verify PSU capacitor health if possible, run 24-hour burn-in at rated load before production deployment, and test all four fans under load to confirm functional cooling.

Yes. MillionMiner hosting services accept S21 series hardware at managed facilities with 220V+ electrical infrastructure. At $0.07 per kWh hosted electricity: +$1.23 daily profit at current Bitcoin pricing. At $0.05 per kWh industrial hosting rates: approximately +$2.78 daily profit. Hosting eliminates facility CapEx, noise management, thermal infrastructure, and day-to-day operational overhead. For first time Bitcoin mining buyers without 220V circuits, dedicated deployment space, or 75 dB-tolerant mining location, hosting through MillionMiner is often the practical path to operational Bitcoin mining. Contact MillionMiner for current hosting rates, power tier options, and facility availability.

Yes, for buyers with 220V+ circuits and dedicated deployment space. The S21 base is the lowest CapEx current generation Bitcoin miner available at MillionMiner, with Bitmain's mature firmware ecosystem, extensive community support, and proven two-year field reliability. At Used pricing $1,402.23, it is the cheapest entry to current generation Bitcoin mining in the MillionMiner inventory. For first time buyers without 220V circuits or dedicated mining space, consider MillionMiner hosting instead of home deployment. For buyers wanting better efficiency who can accept higher CapEx, the S21 PRO at $3,083 produces 60 percent more daily profit. For minimum-CapEx experimentation with real Bitcoin mining before committing to a 200 TH/s industrial ASIC, the Bitaxe Touch ($199, 1.6 TH/s) is a lower-risk starting point.

The S21 base is the lowest CapEx route to S21 generation Bitcoin mining. Buy it if you want the cheapest per terahash entry to current generation hardware, you have access to 220V+ commercial circuits and dedicated mining space, you are building a fleet where per unit CapEx matters more than per unit efficiency, you prefer Bitmain's mature firmware ecosystem and BraiinsOS+ compatibility, or you are opportunistically scaling with uncertain electricity contract terms. Consider the S21 PRO at $3,083 if you want 17 percent better efficiency and more daily profit at higher CapEx. Consider the S21 XP at $4,051 if you want maximum hashrate and efficiency. Consider the Bitdeer SealMiner A3 Pro Air at $4,490 (290 TH/s, 12.5 J/TH) if you want the best air cooled efficiency available in the MillionMiner inventory.

Within S21 family upgrade paths: S21 PRO at 234 TH/s and 15 J/TH for $3,083, S21+ at 235 TH/s, S21 XP at 270 TH/s and 13.5 J/TH for $4,051, S21+ Hyd at 319 TH/s liquid cooled for $3,137, and S21 XP Hydro at 473 TH/s for $6,899. Next generation step: Bitmain S23 at 318 TH/s and 11 J/TH for $8,103. Competing manufacturers at similar or better efficiency: Bitdeer SealMiner A3 Pro Air at 290 TH/s and 12.5 J/TH for $4,490, MicroBT Whatsminer M79 at 920 TH/s hydro cooled. For fleet diversification across algorithms: Bitmain KS7 at 45 TH/s Kaspa for $2,123, Bitmain L9 at 17 GH/s Scrypt, Bitmain D9 at 1.77 TH/s Dash. For minimum CapEx entry to real Bitcoin mining as a starter experiment: Bitaxe Touch at 1.6 TH/s for $199.