Bitcoin’s recent price strength is improving mining economics across the ASIC market. According to the source material, bitcoin has risen 14.6% over the past 30 days, lifting the value of 1 petahash per second (PH/s) of hashpower to about $60.49, up from $53.20 a month earlier. Under an operating cost assumption of $0.06 per kilowatt hour and current network difficulty, a number of high-end mining rigs are now back in solid profit territory.
High-performance ASICs lead the profitability rankings
The most profitable model in the report is Bitmain’s Antminer S21e XP Hydro 3U. The machine delivers 860 TH/s of hashrate while consuming 11,180 watts, translating into an estimated $35.66 in daily profit. That makes it the top-performing ASIC in the comparison, although the power draw is substantial and highlights the trade-off between raw performance and operating intensity.
Second place goes to Auradine’s Teraflux AH3880, an American-made miner rated at 600 TH/s with power consumption near 8,700 watts. While it trails the Bitmain flagship in total hashrate, the machine is positioned as relatively more efficient than the top-ranked unit. Another strong contender is Bitmain’s Antminer S21 XP+ Hydro, which provides 500 TH/s at only 5,500 watts. The report estimates this model generates roughly $22.17 per day in profit and carries an efficiency rating of 11 joules per terahash.
Other leading machines also remain comfortably profitable in the current environment. The Antminer S21 XP Hydro at 473 TH/s and 5,676 watts produces around $20.29 per day. Bitdeer’s Sealminer A2 Pro Hydro, introduced in March 2025, offers 500 TH/s at 7,450 watts and generates an estimated $19.36 daily. Bitmain’s S21e XP Hyd, released in November 2024, produces 430 TH/s while drawing 5,590 watts, good for about $17.83 in daily profit.
The rest of the upper tier includes Canaan’s Avalon A1566HA 2U with 480 TH/s and 8,064 watts, earning about $17.27 every 24 hours; Bitdeer’s Sealminer A2 Hydro at 446 TH/s and 7,360 watts, producing roughly $16.24; Bitmain’s older S19 XP Hydro 3U at 512 TH/s and 10,600 watts, earning $15.55; MicroBT’s Whatsminer M63S+ at 424 TH/s and 7,208 watts, earning $15.14; and Auradine’s Teraflux AI3680, which rounds out the list at 375 TH/s, 5,625 watts, and about $14.47 in daily profit.
Smaller miners still have a niche
Although industrial-scale units dominate profitability rankings, the report notes that smaller and hobbyist-oriented machines are still capable of producing positive returns. Bitmain’s Antminer S17+, first released in 2019, delivers 73 TH/s while consuming 2,920 watts and still manages an estimated $0.19 per day in profit under the stated assumptions.
The newer Nerdminer NerdQaxe++, launched in March 2025, operates with just 76 watts of power and provides 4.8 TH/s, yet still earns about $0.18 per day. Two versions of the Bitmain S17 Pro from April 2019, rated at 53 TH/s and 50 TH/s, remain barely profitable at around $0.16 to $0.17 daily. Meanwhile, the compact Canaan Avalon Nano 3S outputs 6 TH/s at 140 watts and also clears approximately $0.16 per day.
The list of micro-miners also includes the Bitaxe Supra Hex 701, a June 2025 release with 4.2 TH/s of hashrate and a power draw of just 75 watts. Even with modest specifications, it still posts an estimated $0.14 in daily profit. These figures are small in absolute terms, but they suggest that low-power devices may still appeal to experimenters, home miners, and hardware enthusiasts who care about participation more than industrial-scale returns.
The S9 generation remains under pressure
Not every miner is benefiting equally from the current market conditions. The once-dominant Bitmain Antminer S9 series remains largely unprofitable at the assumed electricity cost of $0.06/kWh. The S9 SE, launched in June 2019 with 16 TH/s at 1,280 watts, is reported to be losing about $0.88 per day. The original S9 from 2017, offering 11.5 TH/s at 1,127 watts, is losing roughly $0.93 daily.
Other variants are in even worse shape. The S9 with 12.5 TH/s and the S9i at 14 TH/s are estimated to lose about $1.01 and $1.06 per day, respectively. The S9j and S9k, both in the 13.5 to 14.5 TH/s range and consuming more than 1,300 watts, are also losing around $1.07 each day. These results show how far mining economics have shifted as network difficulty rises and power costs weigh more heavily on older, less efficient hardware.
Cheap electricity can still change the picture
The report also emphasizes that older equipment should not be dismissed entirely, because electricity costs can dramatically alter the outcome. At just $0.02/kWh, some S9-series machines return to profitability. Under those conditions, the S9 SE can produce about $0.35 per day. The S9 Hydro, a 2018 model designed for higher power loads and rated at 18 TH/s, earns about $0.25 daily despite consuming 1,728 watts.
Additional S9 variants also move back into positive territory when electricity is cheap enough. The S9j and S9i earn about $0.22 and $0.21 per day, respectively, while the original S9 and the S9k each manage about $0.18 per day. In other words, the profitability of legacy ASIC fleets is now highly dependent on access to low-cost energy rather than on market price alone.
Efficiency remains the key competitive factor
The broader takeaway is that bitcoin’s latest rally is improving miner cash flow, but the benefits are being distributed unevenly. New-generation, high-efficiency ASICs are capturing the largest gains, with some machines generating well above $20 per day and the best-performing model exceeding $35 per day. Older hardware, by contrast, remains squeezed unless miners can secure unusually cheap electricity.
That dynamic reinforces a familiar industry reality: mining profitability depends not only on bitcoin’s price, but also on network difficulty, hardware efficiency, and power cost. As long as bitcoin remains strong, leading ASIC models should continue to outperform. But for aging fleets, survival in 2025 increasingly comes down to one question—how cheap the electricity really is.