The Bitmain Antminer S21 XP 270T is the newest generation of ASIC miners from Bitmain, released back in June 2024. With a hashrate of 270 TH/s and an energy efficiency of 13.5 J/T, the S21 XP delivers a 12% improvement in efficiency compared to the S21 Pro, making it one of the most powerful and efficient Bitcoin miners still available in 2026.
Key Features
Hashrate: 270 TH/s
Power Consumption: 3684 W
Efficiency: 13.5 J/T (real-world tested)
Cooling: Four 140 mm fans
Power Supply: PSU included
Control Board: Amlogic A113D with 0.91″ OLED display
Warranty: 1-year manufacturer warranty
Design & Build
The S21 XP keeps the wide-body design of the S21 Pro, with identical dimensions and a gross weight of 47 lbs. It includes a C20-P13 power cable and features robust aluminum-backed hashboards with bolt-on heatsinks for reliable cooling.
One new addition is the detachable OLED display on the control board panel, giving operators quick access to miner status without logging into the dashboard.
Chip & Hashboard Improvements
The S21 XP hashboards carry 91 chips per board, compared to 65 chips on the S21 Pro. Each chip hashes at ~1 TH/s, running at lower frequencies for better efficiency. Power delivery has also been upgraded, with tinned copper bus bars replacing traditional PCB traces for more stable performance.
Why Choose the S21 XP?
✅ 12% more efficient than the S21 Pro
✅ Advanced cooling and power design
✅ Real-world tested efficiency of 13.5 J/T
✅ Optional Vnish aftermarket firmware for additional optimization
✅ Backed by Altair Technology’s fast U.S. shipping & support
In Summary
The Antminer S21 XP 270T combines raw power, advanced efficiency, and next-gen design improvements, making it the go-to choice for Bitcoin miners looking to scale their operations in 2026. With competitive pricing, U.S.-based shipping, and warranty-backed support, Altair Technology is your trusted source for the latest in mining hardware. Bitmain does offer a manufactures warranty on their antminers. Here is a warranty guide to walk you through that process.
Specifications
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Product Glance
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Model
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S21 XP
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Algorithm | Cryptocurrency
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SHA256 | BTC/BCH
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Hashrate, TH/s
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270
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Power on wall @25°C, Watt
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3645
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Power efficiency on wall @25°C, J/TH
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13.5
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Detailed Characteristics
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Power supply
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Power supply AC input voltage, Volt(1-1)
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220~277
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Power supply AC input frequency range, Hz
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50~60
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Power supply AC input current, Amp
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20
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Adapted AC output power requirement, W
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4000
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Hardware Configuration
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Network connection mode
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RJ45 Ethernet 10/100M
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Miner size (length*width*height, w/o package),mm(2-1)
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450*219*293
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Miner size (length*width*height, with package),mm
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680*390*450
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Net weight, kg
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20
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Gross weight, kg
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22
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Noise@25℃，dBA
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76
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Environment requirements
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Operation temperature,°C
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-20~45
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Storage temperature,°C
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-20~70
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Operation humidity(non-condensing) , RH
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10%~90%
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Operation altitude, m
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≤2000
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