The recent surge in Bitcoin’s price, climbing 14.6% over the past 30 days, has revitalised the profitability of ASIC (application-specific integrated circuit) Bitcoin miners. With the going rate for 1 petahash per second (PH/s) of hashpower now hovering around $60.49, significantly higher than $53.20 a month ago, top-tier mining rigs are generating substantial daily earnings. This renewed profitability is a welcome development for miners riding the ongoing BTC bull run of 2025.
Leading ASIC Rigs and Their Daily Earnings
At an operating expense (OPEX) of $0.06 per kilowatt hour (kWh) and current difficulty levels, Bitmain’s Antminer S21e XP Hydro 3U stands out as the reigning champion among ASIC miners. This powerhouse machine boasts an impressive 860 terahash per second (TH/s) of hashpower, despite its hefty power consumption of 11,180 watts. At current rates, it’s estimated to pull in a remarkable $35.66 in daily profit.
Close behind is Auradine’s Teraflux AH3880, delivering 600 TH/s at a slightly more energy-efficient 8,700 watts. Bitmain’s Antminer S21 XP+ Hydro, a 500 TH/s workhorse that consumes a modest 5,500 watts, generates approximately $22.17 in daily profit with an energy efficiency rating of 11 joules per terahash. Other high-performing machines include the 473 TH/s Antminer S21 XP Hydro ($20.29 daily profit), Bitdeer’s Sealminer A2 Pro Hydro ($19.36 daily), Canaan’s Avalon A1566HA 2U ($17.27 daily), and Bitdeer’s Sealminer A2 Hydro ($16.24 daily). Even older but capable models like Bitmain’s S19 XP Hydro 3U and MicroBT’s Whatsminer M63S+ are pulling in respectable daily profits.
Micro-Miners and the S9 Saga: Small Gains and Comebacks
For hobbyists and those with lower power setups, smaller mining rigs are also seeing modest profits. Bitmain’s older Antminer S17+ from 2019 still manages about $0.19 per day. The compact Nerdminer NerdQaxe++ and Canaan Avalon Nano 3S are also netting around $0.16-$0.18 daily, demonstrating that even low-power machines can find profitability in the current market.
However, not all miners are equally buoyant. The once-dominant Bitmain Antminer S9 series, at an OPEX of $0.06 per kWh, remains unprofitable, with models like the S9 SE losing around $0.88 per day and the original S9 model bleeding about $0.93 daily. These ageing machines struggle to compete with current difficulty levels and electricity costs.
Yet, for those with access to ultra-cheap power, the S9 series can still make a comeback. At just $0.02 per kWh, the Bitmain Antminer S9 SE can pull in a daily profit of $0.35, while the S9 Hydro nets $0.25 a day. Other S9 models, including the S9j, S9i, and the original S9, can also turn a modest profit under these favourable conditions. This highlights that while most S9s are unprofitable at standard electricity prices, lower OPEX can extend their lifespan in the competitive world of Bitcoin mining.
