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Field report · Sep 1, 2026 · 6 min read
The S19 XP Hyd made the cheapest coin of its whole generation
The cheapest bitcoin of anything from its era we have measured. Three years of a hydro machine that nobody was watching.
Bitmain Antminer S19 XP Hyd (257 TH/s)
The number nobody expected
A 257 TH/s S19 XP Hyd, bought once its price settled and racked in the UAE in October 2023, where our water loops run and a manufacturer warranty centre sits a short drive away. Three years on it is one of the most productive machines we have ever put in a rack, and almost nobody was paying attention to it at the time.
Bought at $5,505, it has mined and kept 0.2171 BTC, worth about $16,789 today. It burned $8,161 of electricity getting them — $37,598 a coin, the cheapest bitcoin of any machine from its generation we have measured.
Cashflow of $8,628 against a landed cost of $6,880. It covered its own hardware and is still mining, heading for about 2.0× by the 2028 halving.
$37,598 a coin. Nothing else from its generation got near that.
Why the hydro version aged better than the air one
At 20.8 J/TH the S19 XP Hyd is not an efficient machine by 2026 standards. What it had was scale: 257 TH/s in a single box, at a time when the air-cooled machines around it were doing 110 to 140. The fixed costs of owning a machine — freight, import duty, customs, rack space, the setup labour — are broadly the same whether the box does 120 TH or 257, so spreading them over twice the hashrate halves them per terahash.
That is the whole reason it beat its air-cooled contemporaries on cost per coin despite being no more efficient per terahash. It is also the reason we keep recommending people look at total output per unit and not only at J/TH.
The move that extended it
It ran in the UAE for 869 days — almost two and a half years in the plant it was built for. On 20 March 2026 we moved it to Nigeria, where it has run ever since. We did not wait for it to stop clearing at 6¢: we moved it once a full year of figures said 3.9¢ had become decisively the better home for it, which is an earlier date and a permanent one.
That relocation is what the rest of its life runs on. Nigeria mines fewer coins than the UAE because its uptime is lower, but it mines them for a third less — and once hashprice had fallen far enough, for long enough, that trade turned in Nigeria’s favour and stayed there. It has another 0.043 BTC and roughly $5,338 in it before the 2028 halving at 3.9¢, which it would not have at 6¢.
What it says about the 2022 generation
The S19 XP family cost more than its contemporaries and people complained about that at the time. Four years on it is the machine from that era that covered its hardware, ran straight through a halving, and still has earning left in it.
The lesson is not complicated and it keeps repeating: the machine that looks expensive on the day tends to be the one still working when the cheap one has been retired. That is the argument for buying efficiency, and this is what it looks like when it plays out over a full lifecycle.
- Bitmain Antminer S23 Hyd (563 TH/s) — 9.5 J/TH, In stock, $22,725 of electricity per bitcoin, 19% year one
- Bitmain Antminer S21j XP Hyd (495 TH/s) — 12 J/TH, In stock, $28,599 of electricity per bitcoin, 31% year one
- Bitdeer SealMiner A3 Pro Hyd (666 TH/s) — 12.5 J/TH, In stock, $29,513 of electricity per bitcoin, 25% year one
Which machines this covers
The other side of this machine
Antminer S19 XP Hyd review: 20.8 J/TH on water at $3 a terahash, and Nigeria pays best — Bitmain's S19 XP Hyd is a water-cooled machine that makes 257 TH/s from 5,345 W, at one of the lowest prices per terahash we list. On water in the UAE it clears its power with a thin margin today. At Nigeria's 3.9¢ it clears it by a wide one.
Disclosure
Firsthand Bitcoin sells and hosts mining hardware, including this machine. No manufacturer, distributor or affiliate programme paid for or reviewed this page and we take no commission on the links above. Historical figures are computed from daily bitcoin price and network hashprice, each day valued at its own prices. Nothing here is investment advice.