At an operating cost of $0.04 per kilowatt-hour (kWh), the current yield of the Sha256 Bitcoin Miner is categorized as a clear profit ladder, with high hashrate hydro units setting the pace and setting some efficient air and immersion options.
4 Cent Test: Which Bitcoin Mining Rigs Still Shining?
The Hill King at this power price is printing around $50.06 per day at Bitmain Antominer S23 Hydro 3U, at about 11,020 W on the wall at 1,160 th/s.
This is the classic “slow hash at it” approach. It’s a daily take that sets the huge throughput of the class, wise power, and all the benchmarks that follow. Nevertheless, the S23 Hydro 3U will not reach buyers until January 2026.
The runner-up was the Antminer S21E XP Hydro 3u from Bitmain at 860 Th/s and 11,180 W, which earned $34.23 a day using today’s BTC prices. Its efficiency promotes pure TH/SSSSSS-HYDRO 3U per watt, but still provides a strong daily dollar figure. When cheap power meets a large amount of hash, physics and mathematics shake hands.
Third place is at the 819 Th/s Proto Rig and the sturdy 12,000 W, which is suitable for $31.30 a day. It is a typical custom class brute created by blocks. It’s more starving for touch than the leader, but the hashrate keeps it at the top layer. If electrical capacity is available, a higher draw for the unit will be converted to a proportionately higher daily output.
The BitDeer SealMiner A3 Pro Hydro features a fourth slot at 660 Th/s, 8,250 W and $26.58 a day. The combination of hydro cooling and measured power draw makes it an attractive mid-top option. Right behind that, Bitmain’s Antminer S23 Hydro (non-3U) clock registers 580 Th/s at 5,510 W at 580 W at nets for $25.03 a day.
Auradine’s Teraflux AH3880 adds diversity to the Podium crowd: 600 Th/s, 10,740 W, and $21.06/1 day. It provides consistent output with 4 cents of power and is positioned along comparable units. This unit highlights how efficiency and wattage create a narrow margin that separates mid-layer machines.
Bitmain’s Antminer S21 XP+ Hydro continues at 500 Th/s at 5,500 W, generating $20.86 per day. Bitdeer’s Sealminer A3 Hydro offers the same 500 Th/s, but with a 6,750 W draw, it costs $19.66 per day. This comparison shows how the same hashrate can produce different returns when efficiency is taken into account.
The 473 Th/s and 5,676 W Bitmain Antminer S21 XP Hydro continues for $19.28 a day. From there, Bitdeer’s Sealminer A2 Pro Hydro shows 500 Th/s at 7,450 W and $18.99 a day. This is thirsty than the A3 hydro of the same hashrate, but it is still solid in this Opex. Bitmain’s Antminer S23 Immersion (442 Th/s, 5,304 W) adds $18.02 a day. This is a lovely “cool and quiet” option where soaking is standard.
The midpack begins to compress. Canaan’s Avalon A1566ha 2U posts 480 Th/s for 8,064 W at $17.35 per day, while Microbt’s Whatsminer M63S ++ matches daily numbers -464 Th/s, 7,200 W, $17.35/day. For a slightly higher th/s, draw a little more power. The other one is leaning towards efficiency. Either way, with four cents of power, they land in the same daily dollars.
Bitmain’s Antminer S21E XP Hydro supplies 430 Th/s and 5,590 W supplies $17.11 per day. Old but related Antminer S19 XP Hydro 3U log 512 Th/s and 10,600 W at $16.59 per day, proving that the legacy hydrobox remains viable when running cheaply.
Bitdeer’s Sealminer A2 Hydro (446 Th/s, 7,360 W) slot costs $16.25 per day. Microbt’s Whatsminer M63s+ marks the ladder points where power begins to get into pinch – 424 Th/s, 7,208 W, $15.25 per day – power begins to get into pinch. Still, at $0.04/kWh, even these units maintain a respectable daily return when run continuously.
From here, this area turns into a clinic about efficiency trade-offs. Bitmain’s Antminer S21+ Hydro costs $13.56 a day at 358 Th/s and 5,370 W. Microbt’s WhatsMiner M63S List 390 Th/s, 7,215 W, $13.46 a day. Microbt’s WhatsMiner M66S ++ 356 Th/s, especially 5,518 W Lands $13.31/1 day. The pattern is clear: trim watts and protect profits.
Bitmain’s Antminer S23 (air-cooled) posts 318 Th/s for just 3,498 W at $13.27 per day. This reminds us that wise wattages can maintain smaller hash rigs in conversation. The 335 Th/s and 5,360 W Bitmain’s Antminer S21 Hydro generates $12.37 per day, placing it in a middle tier machine with a balance of efficiency and hashrate with electricity costs.
Auradine’s TeraFlux AI368Q is 360 TH/s, 6,840 W, and $12.25 a day. Bitmain’s Antminer S21+ Hydro (319 Th/s variant) trimmed to 4,785 W and is net for $12.08 a day. These units exhibit consistent power usage and output, and performance figures remain stable when compared with larger operational groups.
Antminer S21 XP Immersion at 300 Th/s and 4,050 W returns $11.80 a day, while Bitdeer’s Sealminer A3 Pro Air concludes the list with 290 Th/s, 3,625 W and $11.68/day. There are still places in the air where water and soak are particularly unrealistic, but with this opex, water and soak tend to keep small edges.
Bitmain’s Antminer S9 series was once the backbone of global hash power before 2019, but is now lost. Units like the S9 SE, S9I, S9J, and S9 Hydro all generate negative returns, with daily losses ranging from $0.39 to $0.72. The industry’s crucial flagship, the S9 family today plays more than a viable option as a relic of the past in Bitcoin mining.
What pops out on all 26 models (not including the S9S) is how the Hydro-Cooled class seized the rung at the top. At the top is a hashrate story. The 1,160 Th/s of the S23 Hydro 3U can bulldoze the bulldoze when it drops in January, but the midtable is an efficient storyline, with a sub-7 kW rig of 300-500 Th/s coming in surprisingly close to the daily dollars. The cheap power is won by pure hash. A practical power budget keeps efficient units in money.
Another takeaway: The parity moment is real. Both the Canaan Avalon A1566ha 2u and Microbt Whatsminer M63s++ show printing at $17.35 per day. For operators, that means that procurement can take into account availability, guarantees and fleet standardization without giving up on profits in a market where supply timing is half the game.
Mixing vendors also takes advantage of the risk. The lineup spans the Bitmain S23/S21 family, Bitdeer’s Sealminer A-Series, Microbt’s M63/M66 units, Auradine’s Teraflux model, Canaan Avalon Anchor, and even custom-style Proto Rig from the block, helping to block logistics across farm navigation parts, businesses and the entire sachet. At $0.04/kWh, math supports diversity without sacrificing much with meter.
In short, at the 4-cent Opex threshold, the profit ladder is topped with high-throughput hydrogear (the upcoming Bitmain Antminer S23 Hydro 3U) in a tightly packed mid-length that keeps the light as green in efficiency. From the S21E XP Hydro 3U and Proto Rig to the SealMiner A3 Pro Air, all models here can draw that weight. The correct choice of racks depends on your amplifier, aisle and appetite.
