Bitmain Antminer S21 Hydro
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BitmainSHA-256BTC
Antminer S21 Hydro (335T)
335 TH/s5,360 WHydro-cooled
Profit / day
-$0.29/day
after power at $0.08/kWh
Efficiency
16.00J/TH
Availability
Out of stockNone available right now. We can tell you when it’s back.—
Profitability · SHA-256 · BTC
Is the Antminer S21 Hydro profitable?
Not at $0.08 per kWh. The Bitmain Antminer S21 Hydro (335T) mines Bitcoin on the SHA-256 algorithm at 335 TH/s, drawing 5,360 W (16.0 J/TH). At $0.08 per kWh it earns about $10.00 a day but spends $10.29 on power, so it loses $0.29 a day.
It’s #67 of 269 SHA-256 miners on efficiency. It isn’t in stock with us at the moment. It’s a hydro (water-cooled) unit, released in February 2024.
- Break-even power price
- $0.078/kWh
- Daily profit rank
- #180of 533
It only makes money below this.
Across every miner we track.
Antminer S21 Hydro specifications
Other coins it can mine
Mine instead
BitcoinBTCRanked on
$10.000.000133 BTC
–
0.000038%
$31.0B
−2.0%
QuaiQUAI
$11.871,652 QUAI
+19%
0.43%
$91kLow liquidity
+14.7%
DigiByte (SHA-256)DGB
$11.013,619 DGB
+10%
1.3%Noticeable
$2.3M
−3.3%
eCashXEC
$10.991,937,540 XEC
+10%
0.76%
$1.6M
−6.2%
Bitcoin SVBSV
$9.990.615 BSV
<1%
0.14%
$6.6M
−2.4%
Bitcoin CashBCH
$9.860.0412 BCH
−1%
0.01%
$175.1M
−13.7%
Paid on top
Fractal BitcoinFB
+<$0.010.00172 FB
+<1%
0.00004%
$2.4M
−16.8%Volatile
NamecoinNMC
+<$0.010.000144 NMC
+<1%
0.00004%
$0Illiquid
+0.4%
ElastosELA
+<$0.010.000144 ELA
+<1%
0.00004%
$307k
−43.0%Highly volatile
HathorHTR
+<$0.010.0129 HTR
+<1%
0.00004%
$71kLow liquidity
−17.7%Volatile
Max potential profitUnlikely
-$0.29/day
-$0.29 BTC profit + <$0.01 paid on top
How it compares · SHA-256 miners
| Miner | Rank | Efficiency | Profit / day |
|---|---|---|---|
| Bitmain Antminer S23 Hyd 3U (1.16 PH) | #1 | 9.5 J/TH | $13.48 |
| Bitdeer SealMiner A4 Ultra Hydro | #2 | 9.4 J/TH | $10.38 |
| Bitmain Antminer S23e Hyd U2H (865T) | #3 | 10.0 J/TH | $9.22 |
| Bitmain Antminer S23e Hyd 2U (865Th) | #4 | 10.0 J/TH | $9.22 |
| Bitaxe Gamma Duo 650 | #62 | 16.0 J/TH | -$0.00 |
| NerdMiner NerdQaxe++ | #63 | 15.8 J/TH | -$0.00 |
| MicroBT WhatsMiner M60S++ | #90 | 15.9 J/TH | -$0.16 |
| Bitmain Antminer S21 Hydro (335T)This miner | #93 | 16.0 J/TH | -$0.29 |
| Bitmain Antminer S21 (200T)Earlier model | #114 | 17.5 J/TH | -$0.75 |
| Bitmain Antminer T21 (190Th)Newer model | #134 | 19.0 J/TH | -$1.26 |
More from Bitmain
| Miner | Profit / day |
|---|---|
| Bitmain Antminer Z15 Pro (860K)Equihash | $125.48 |
| Bitmain Antminer Z15 Pro (840K)Equihash | $122.43 |
| Bitmain Antminer Z15K (565kh)Equihash | $81.17 |
| Bitmain Antminer Z15KEquihash | $75.09 |
| Bitmain Antminer Z15Equihash | $60.99 |
Figures updated 00:01 UTC, 10 November 2026, using today’s network difficulty and coin prices. Estimates, not financial advice.