The recent 14.6% surge in Bitcoin's price over the past 30 days has translated into significantly higher earnings for miners. The hashprice, or the value of 1 petahash per second (PH/s) of computing power, now stands at $60.49, up 13.7% from $53.20 a month ago. This rebound has pushed several application-specific integrated circuit (ASIC) mining rigs back into solid profitability, even as network difficulty remains elevated.
Top-Performing ASIC Rigs in July 2025
Assuming an operating expense (OPEX) of $0.06 per kilowatt-hour (kWh) and current difficulty levels, the Bitmain Antminer S21e XP Hydro 3U leads the pack with a hashrate of 860 TH/s and a power draw of 11,180 watts. Its estimated daily profit is $35.66, making it the most lucrative ASIC on the market today. The second-place rig is Auradine's Teraflux AH3880, a U.S.-made machine delivering 600 TH/s at 8,700 watts, offering better energy efficiency albeit lower raw hashing power. Close behind is the Bitmain Antminer S21 XP+ Hydro (500 TH/s, 5,500 watts), generating around $22.17 per day. Other notable profitable miners include the Antminer S21 XP Hydro (473 TH/s, $20.29/day), Bitdeer's Sealminer A2 Pro Hydro (500 TH/s, $19.36/day), the Antminer S21e XP Hyd (430 TH/s, $17.83/day), Canaan Avalon A1566HA 2U (480 TH/s, $17.27/day), Bitdeer Sealminer A2 Hydro (446 TH/s, $16.24/day), the older Antminer S19 XP Hydro 3U (512 TH/s, $15.55/day), MicroBT Whatsminer M63S+ (424 TH/s, $15.14/day), and Auradine Teraflux AI3680 (375 TH/s, $14.47/day).
Micro-Miners: Small Hashrate, Still Profitable
For hobbyists and low-power enthusiasts, the numbers shrink but the appeal remains. The Bitmain Antminer S17+ (2019, 73 TH/s, 2,920 watts) earns about $0.19/day. The tiny Nerdminer NerdQaxe++ (launched March 2025, 4.8 TH/s, 76 watts) nets $0.18/day. The Canaan Avalon Nano 3S (6 TH/s, 140 watts) brings in $0.16/day, while the Bitaxe Supra Hex 701 (June 2025, 4.2 TH/s, 75 watts) yields $0.14/day. These micro-rigs prove that even modest hardware can participate in mining profitably under favorable conditions.
The S9 Comeback: From Losses to Marginal Gains
The once-legendary Bitmain Antminer S9 series, a former titan of Bitcoin mining, is now largely unprofitable at standard electricity costs of $0.06/kWh. The S9 SE (16 TH/s, 1,280 watts) loses about $0.88/day, the original S9 (11.5 TH/s) loses $0.93/day, and models like the S9j and S9k lose over $1.07/day. However, if miners can access ultra-cheap power at $0.02/kWh, these aging machines claw back into profitability. The S9 SE earns $0.35/day, the S9 Hydro (18 TH/s) earns $0.25/day, and other S9 variants (S9j, S9i, S9k) generate between $0.18 and $0.22/day. This highlights that electricity cost remains the single most critical variable for legacy hardware survival.
In summary, the current Bitcoin bull run has breathed new life into ASIC mining profitability, especially for the latest high-efficiency models. Meanwhile, older equipment like the S9 series can still be viable in niche low-power-cost scenarios, though they remain largely uneconomical under standard rates.