Bitmain Antminer S21++ (ASIC) Mining Profitability & Solo Block Chance
See the daily, monthly and annual mining profitability of the Bitmain Antminer S21++ ASIC across every compatible proof-of-work coin, plus its solo block-hit probability. BackPoW uses live network difficulty and coin prices, and lets you set your electricity cost and pool fee to get realistic net profit figures.
Bitmain Antminer S21++ at a glance
- Type: ASIC
- Mineable coins: 9
- Primary algorithm: SHA-256
- Hashrate: 235.33 TH/s
- Power draw: 3878 W
- Efficiency: 16.5 J/TH
- Current market price: $1,759–$2,884 across 13 vendors (median $2,032)
- Payback period: ~502 days (median price ÷ best net daily profit at $0.069/kWh)
- Breakeven electricity rate: 0.1125 USD/kWh — mining becomes unprofitable above this electricity tariff
- Efficiency rank: #46 of 201 by energy efficiency among SHA-256 ASICs
- Expected time to solo mine 1 BitcoinII block: ~12.8 h at the Bitmain Antminer S21++'s rated hashrate
- Most profitable coin today: BitcoinII (BTCII) — ~$10.47/day gross
- Top mineable coins: BitcoinII, Quai-SHA, Peercoin, Bitcoin, eCash
Top Bitmain Antminer S21++ coins by daily revenue
Estimated gross mining revenue per day at the Bitmain Antminer S21++'s rated hashrate, using live network difficulty and coin prices (before electricity and pool fees):
- BitcoinII (BTCII) — ~$10.47/day gross
- Quai-SHA (QUAI) — ~$10.10/day gross
- Peercoin (PPC) — ~$9.90/day gross
- Bitcoin (BTC) — ~$9.22/day gross
- eCash (XEC) — ~$9.14/day gross
Recommended solo mining pools for the Bitmain Antminer S21++
To solo mine with the Bitmain Antminer S21++, connect your rig's stratum configuration to a verified solo pool gateway so you receive 100% of the block reward when finding a block. Top verified solo pools for BitcoinII (BTCII):
- sneakattack.se — 0% fee (180.08 TH/s)
- jackpool.ru — 0.5% fee (35.24 TH/s)
- nitropool.net — 0.5% fee (11.72 TH/s)
- mining-dutch.nl — 1% fee (854.50 TH/s)
- solofury.com — 1% fee (514.42 TH/s)
Compare all BitcoinII solo mining pools & stratum fees →
Frequently asked questions
What coins can I mine with the Bitmain Antminer S21++?
The Bitmain Antminer S21++ (ASIC) can mine 9 proof-of-work coins on BackPoW, including BitcoinII, Quai-SHA, Peercoin, Bitcoin. Each coin shows its estimated hashrate, daily revenue and solo block-hit probability.
How profitable is the Bitmain Antminer S21++ for mining?
Profitability of the Bitmain Antminer S21++ depends on the coin, its network difficulty, the coin price, your electricity cost and pool fees. BackPoW ranks every mineable coin by daily, monthly and annual profit so you can pick the best target.
What is the best coin to mine with the Bitmain Antminer S21++?
Right now the single highest-earning coin for the Bitmain Antminer S21++ is BitcoinII (BTCII), at about $10.47/day gross (gross, before electricity). BackPoW re-ranks every mineable coin daily using live network difficulty and prices, so this can change.
Can the Bitmain Antminer S21++ solo mine?
Yes. BackPoW computes the Bitmain Antminer S21++'s solo block-hit probability per coin using a Poisson model based on live network hashrate, so you can gauge your realistic chance of finding a block.
How long would the Bitmain Antminer S21++ take to solo mine one BitcoinII block?
About one BitcoinII (BTCII) block every 12.8 h on average at the Bitmain Antminer S21++'s rated hashrate, using BitcoinII's live network hashrate. Real results are random (Poisson) around this mean, recalculated every update.
Where can I solo mine with the Bitmain Antminer S21++?
You can solo mine BitcoinII with the Bitmain Antminer S21++ by connecting to verified solo stratum gateways such as sneakattack.se, jackpool.ru, nitropool.net. These pools forward 100% of the block reward directly to your wallet upon discovery (minus standard pool fees).
What is the breakeven electricity rate for the Bitmain Antminer S21++?
The Bitmain Antminer S21++ breaks even at approximately 0.1125 USD/kWh. If your electricity tariff is below this threshold, mining is profitable at current coin prices and network difficulty. Above this rate, power costs exceed daily revenue and the miner operates at a loss. BackPoW recalculates this figure every update.
Coins you can mine with the Bitmain Antminer S21++
- Mine BitcoinII (BTCII) with the Bitmain Antminer S21++
- Mine Quai-SHA (QUAI) with the Bitmain Antminer S21++
- Mine Peercoin (PPC) with the Bitmain Antminer S21++
- Mine Bitcoin (BTC) with the Bitmain Antminer S21++
- Mine eCash (XEC) with the Bitmain Antminer S21++
- Mine BitcoinCash (BCH) with the Bitmain Antminer S21++
- Mine Fractal (FB) with the Bitmain Antminer S21++
- Mine DGB-SHA (DGB) with the Bitmain Antminer S21++
- Mine Unobtanium (UNO) with the Bitmain Antminer S21++
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