Bitmain · Mar 2026
Antminer S21j XP Hydro
- Hashrate
- 495.00 Th/s
- Power
- 5.94 kW
- Efficiency
- 12.00 W/Th
- Benchmark
- $0.14/kWh
The 2026 refresh of the XP Hydro: 495 Th/s, revised control board, quieter pumps.
Top payouts / 24h
- QUAI$20.60
- PPC$17.65
- BTC$16.77
CatalogueSHA-256$20.60/day SHA-256$20.80/day SHA-256$20.80/day
SHA-256Hydro cooledReleased Sep 2024#11 by 24h profit
Bitmain
Antminer S21 XP Hydro
The unit that made hydro mainstream. Still 12.00 W/Th, now at secondary-market pricing.
Hashrate
473.00 Th/s
Power draw
5.68 kW
Efficiency
12.00 W/Th
Profit / 24h
$19.68
Priced per unit on request — pricing moves with batch, condition and freight destination.
Technical faceplate drawing generated from this unit's own specs — board count, port layout and vent density track the real configuration. Photography available on request.
The short version
Two years on, the S21 XP Hydro remains the most widely deployed liquid-cooled miner in the world, which makes it the safest used purchase in the catalogue: parts, firmware and technicians are everywhere. Our stock is tested for 72 hours on the bench before it ships.
- Most widely deployed hydro platform globally
- 72-hour bench burn-in on every used unit
- 12.00 W/Th at 473 Th/s
Full specification
- Manufacturer
- Bitmain
- Model
- Antminer S21 XP Hydro
- Release
- Sep 2024
- Algorithm
- SHA-256
- Cooling
- Hydro — direct liquid loop
- Nameplate hashrate
- 473.00 Th/s
- Power at the wall
- 5676 W
- Efficiency
- 12.00 W/Th
- Benchmark power price
- $0.14/kWh
- Electricity cost / 24h at benchmark
- $19.07
- Gross revenue / 24h
- $19.68
- Profit / 24h
- $19.68
- Data source
- August 2026 dataset
Run the numbers
Break-even power price: $0.144/kWh
Gross / day
$19.29
Power / day
−$18.69
Net / day
$0.60
- Net per month
- $18.16
- Net per year
- $217.71
- Margin on revenue
- 3.1%
Gross revenue is the catalogue figure for this unit. Net subtracts electricity at your rate only — pool fees, hosting and hardware amortisation are not included, and payouts move with network difficulty.
Where the money comes from
Best-paying SHA-256 targets over the last 24 hours.
Top coins — revenue
- QUAISHA-256$19.68
- PPCSHA-256$16.91
- BTCSHA-256$16.03
Top coins — profit
- QUAISHA-256$19.68
- PPCSHA-256$16.91
- BTCSHA-256$16.03
Switching targets is a firmware and pool-config change, not a hardware change. Most operators point at the top line and let a profit switcher handle the rest.
What a quote includes
- Unit price at your order quantity
- Lead time and current batch availability
- Freight to your site, duties flagged separately
- Warranty terms — new, refurbished or as-is
- Payback estimate against your real power price
Comparable SHA-256 units
Bitdeer · Sep 2025
Sealminer A3 Hydro
- Hashrate
- 500.00 Th/s
- Power
- 6.75 kW
- Efficiency
- 13.50 W/Th
- Benchmark
- $0.13/kWh
Half a petahash per chassis at a price point that clears quickly on volume orders.
Top payouts / 24h
- QUAI$20.80
- PPC$17.82
- BTC$16.94
Bitdeer · Mar 2025
SealMiner A2 Pro Hyd 500T
- Hashrate
- 500.00 Th/s
- Power
- 7.45 kW
- Efficiency
- 14.90 W/Th
- Benchmark
- $0.12/kWh
Previous-generation 500T sled. Best value per terahash if power is cheap.
Top payouts / 24h
- QUAI$20.80
- PPC$17.82
- BTC$16.94