Bitcoin's recent rally—up 14.6% over the past 30 days—has breathed new life into the mining sector. The hashprice, or daily revenue per petahash per second (PH/s), has jumped from $53.20 to $60.49, a 13.7% increase. At an operating expense (OPEX) of $0.06 per kilowatt-hour (kWh), several top-tier ASIC miners are now generating significant daily profits, while even legacy machines like the Bitmain Antminer S9 can claw back into the black when electricity costs are ultra-low.
Top ASIC Miners by Daily Profit
The most profitable rig currently is Bitmain's Antminer S21e XP Hydro 3U, delivering 860 TH/s at 11,180 watts. It nets an estimated $35.66 per day. In second place is the American-made Auradine Teraflux AH3880 (600 TH/s, 8,700 W), followed by Bitmain's Antminer S21 XP+ Hydro (500 TH/s, 5,500 W) with $22.17 daily profit. Other profitable models include the S21 XP Hydro (473 TH/s, $20.29), Bitdeer's Sealminer A2 Pro Hydro (500 TH/s, $19.36), Bitmain's S21e XP Hyd (430 TH/s, $17.83), Canaan Avalon A1566HA 2U (480 TH/s, $17.27), Bitdeer Sealminer A2 Hydro (446 TH/s, $16.24), Bitmain S19 XP Hydro 3U (512 TH/s, $15.55), MicroBT Whatsminer M63S+ (424 TH/s, $15.14), and Auradine Teraflux AI3680 (375 TH/s, $14.47). These figures highlight that high-hashrate, efficient ASICs are the clear winners in the current bull market.
Micro-Miners: Small Rigs, Modest Earnings
For hobbyists, smaller rigs still offer a taste of mining. Bitmain's Antminer S17+ (2019, 73 TH/s, 2,920 W) earns about $0.19 daily. The Nerdminer NerdQaxe++, launched in March 2025, consumes just 76 watts for 4.8 TH/s and earns $0.18 per day. Canaan's Avalon Nano 3S (6 TH/s, 140 W) nets $0.16, while the Bitaxe Supra Hex 701 (June 2025, 4.2 TH/s, 75 W) yields $0.14 daily. These micro-miners are more about fun than profit, but they remain viable for low-power enthusiasts.
Vintage S9 Series: From Losses to Revival with Cheap Power
The once-dominant Bitmain Antminer S9 series is now mostly unprofitable at standard electricity costs ($0.06/kWh). The S9 SE (16 TH/s, 1,280 W) loses $0.88 per day, while the original S9 (11.5 TH/s) loses $0.93. The S9j and S9k models each lose over $1 daily. However, when the OPEX drops to $0.02/kWh, these aging workhorses spring back to life: the S9 SE earns $0.35/day, the S9 Hydro (18 TH/s) earns $0.25, and even the original S9 brings in $0.18 per day. This demonstrates that low-cost electricity is the key to extending the life of older mining hardware.
Overall, Bitcoin's bullish trend is delivering tangible profits to miners. While top-end machines dominate the profitability charts, older rigs can still survive—and even thrive—under the right power conditions. Miners should carefully evaluate hashpower, energy efficiency, and electricity rates to maximize returns in 2025's ongoing rally.