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Bitmain Antminer S21 XP Immersion (300Th)

Model: Antminer S21 XP Immersion

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300 TH/s immersion-cooled SHA-256 miner at 4,050W with 50 dB silent operation. No fans, no dust, extended hardware lifespan. Includes warranty and free DDP shipping from MillionMiner.

300 TH/s 4050W SHA-256 13.5 J/TH

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Genuine

Tested hardware

Worldwide

Global shipping

Support

Mining experts

Hashrate

300 TH/s

Power

4050 W

Efficiency

13.50 J/TH

Noise

50 dB

Estimated Mining Returns

Based on current BTC price & network difficulty. Indicative only.

Period Daily Weekly Monthly
Income
$12.77 $89.39 $383.10
Electricity
-$7.78 -$54.46 -$233.40
Profit
$4.99 $34.93 $149.70

Using 0.080 $/kWh · Network difficulty as of today. Estimates only.

Adjust rate in the bar above

Updated daily. Last refresh: Apr 21, 2026. Estimates at $0.08/kWh.

Full Specifications

Hashrate 300 TH/s
Power Consumption 4050 W
Efficiency 13.50 J/TH
Algorithm SHA-256
Model Antminer S21 XP Immersion
Release Year Oct 2024
Noise Level 50 dB
Dimensions 400 x 195 x 290mm
Weight 14.4 kg
Voltage 100-240V
Interfaces Ethernet 10/100M
Operating Temp 5 - 45 °C
Humidity 5 - 95 %
Cooling Type Immersion

What's in the Box

Antminer S21 XP Immersion
Power supply unit (PSU)
Power cables
Quick start guide

Contents may vary by batch. Exact items listed in order confirmation.

Quick Setup

1

Connect PSU to miner and plug into the outlet

2

Connect ethernet cable to your router or switch

3

Find miner IP via router admin or IP scanner tool

4

Open web interface, enter pool URL and wallet — start mining

Hydro-cooled miners require 380-415V three-phase power and a hydro cooling loop. Standard household outlets are not compatible. Contact our team for hosting options or setup guidance.

Product Details

Bitmain Antminer S21 XP Immersion 300TH Immersion-Cooled SHA-256 Bitcoin Miner for Advanced Operations

The Bitmain S21 XP Immersion produces 300 TH/s at 4,050W while submerged in dielectric cooling fluid. Immersion cooling eliminates fans entirely. The unit has no moving parts. All cooling happens through the fluid absorbing heat from chips and transferring it to external heat exchangers.

Immersion provides three operational advantages over air cooling: sustained hashrate without thermal throttling (fluid maintains consistent chip temperatures regardless of ambient conditions), extended component life (no thermal cycling from fan speed changes), and zero air filtration requirements (no dust, no contaminated air intake, no filter maintenance).

Universal 100 to 240V input on an immersion miner is notable. Most immersion hardware from MicroBT and newer Bitmain models requires 380V+ three phase. The S21 XP Immersion on single phase power opens immersion mining to facilities without industrial electrical infrastructure, provided they have the tank and fluid setup.

13.5 J/TH efficiency. The current S23 Immersion at 442 TH/s produces more hashrate at better efficiency but requires 380 to 415V. For single phase facilities with immersion infrastructure, the S21 XP may be the only Bitmain option.

50 dB from pumps and heat exchangers (the submerged unit is silent). 14.4 kg at 400 x 195 x 290mm. Ethernet connectivity. 5 to 45 degrees Celsius. Bitmain firmware ecosystem. Bitcoin, Bitcoin Cash, all SHA 256. Single phase dielectric fluid immersion cooling.

Immersion infrastructure requires: tanks, dielectric fluid (Engineered Fluids, 3M Novec, or equivalent), pumps, and external heat exchangers. Higher upfront investment than air cooling, offset by operational advantages.

Antminer S21 XP Immersion 300TH Silent Bitcoin Miner

Bitmain S21 XP Immersion. 300 TH/s at 4,050W submerged in dielectric fluid. Universal 100 to 240V on an immersion miner. Rare single phase immersion capability.

No fans, no moving parts, no air filtration. Sustained hashrate without throttling. Extended component life through consistent thermal management. S23 Immersion (442 TH/s) is more powerful but needs 380V+.

13.5 J/TH. 14.4 kg at 400 x 195 x 290mm. 50 dB from cooling infrastructure (unit is silent). Bitmain firmware. Ethernet. 5 to 45 degrees. Immersion requires tanks, dielectric fluid, pumps, and heat exchangers. Higher upfront infrastructure offset by operational advantages.

Immersion infrastructure has a higher upfront cost than air or hydro cooling: tanks ($2,000 to $10,000+), dielectric fluid ($1,000 to $5,000+ per tank depending on size and fluid type), pumps, and heat exchangers. The payback comes through higher sustained hashrate (no thermal throttling), longer hardware life (3 to 5+ years versus 3 years for air cooled), and zero fan maintenance. Model the infrastructure cost against operational savings over your deployment horizon.

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S21 XP Immersion 300TH Bitcoin Miner

Moderate noise SHA-256 at 300 TH/s from Bitmain. 300 TH/s at 4,050W in dielectric fluid. 100 to 240V universal immersion. No fans. Sustained hashrate. Extended component life. 13.5 J/TH. 14.4 kg. 50 dB external only. Single phase immersion. Bitmain firmware. Ethernet. Immersion infrastructure: tanks $2,000 to $10,000+, dielectric fluid $1,000 to $5,000+, plus pumps and heat exchangers. Payback through sustained hashrate and extended hardware life.

300TH Fully Immersed

Every component runs submerged in dielectric fluid, delivering 300 terahash with thermal management that air and standard hydro cooling cannot replicate.

Zero Fans, Zero Dust, Zero Wear

No mechanical moving parts in the cooling system. No dust ingress. Dramatically reduced maintenance and extended hardware lifespan.

Heat Recovery Ready

Immersion cooling captures thermal energy efficiently for secondary use in building heating, greenhouse cultivation, or other waste heat applications.

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FAQ

Frequently Asked Questions

300 TH/s SHA-256 at 4,050W immersion cooling. 13.5 J/TH. For dielectric coolant tank deployment.

Yes. Free DDP shipping.