Hashrate usually gets compared with watts, dollars, or joules per terahash. Weight is another useful engineering metric: how much SHA-256 throughput fits into each kilogram of hardware.
Using published manufacturer hashrate and net-weight figures for model variants we could verify, these seven machines had the highest ratios. The calculation is simple: TH/s ÷ net kilograms.
- Antminer S23 Hyd. — 580 TH/s, 13.0 kg — 44.6 TH/kg
- Antminer S23 XP Hyd. — 600 TH/s, 15.8 kg — 38.0 TH/kg
- Antminer S21 XP Hyd. — 473 TH/s, 13.8 kg — 34.3 TH/kg
- Antminer S21 XP+ Hyd. — 500 TH/s, 14.8 kg — 33.8 TH/kg
- Antminer S21e XP Hyd. — 430 TH/s, 13.8 kg — 31.2 TH/kg
- Antminer S21j XP Hyd. — 495 TH/s, 16.2 kg — 30.6 TH/kg
- Antminer S23e U2H — 865 TH/s, 29.0 kg — 29.8 TH/kg
The striking part is that every machine in this top seven uses hydro cooling. Removing large onboard air-cooling hardware lets manufacturers pack unusually high compute density into the miner chassis.
Apexto Mining — hardware look at the 473 TH/s Antminer S21 XP Hydro.
This is not the same thing as energy efficiency. Our ranking of the most efficient Bitcoin miners compares J/TH instead, while What Is Hashrate? explains what the TH/s figure actually measures. Our ASIC architecture guide gives more context on how Bitmain, Canaan, MicroBT and Bitdeer approach mining hardware.
A recent S21 XP teardown gives a closer look at the physical hardware behind the hashrate numbers.
BITMAIN’s product manuals and current shop listings were used for the published hashrate and net-weight figures. Ratios are rounded to one decimal place.
A high TH/kg score also does not include pumps, coolant, dry coolers, plumbing, racks or other supporting infrastructure. For a technician carrying only the miner chassis, though, the S23 Hyd. is the clear “lightweight” champion.
Editor’s Note
This ranking compares published miner-chassis net weight with nominal SHA-256 hashrate. Different revisions, operating modes and future product batches can change the result.
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