mining

Bitmain Antminer S21 Pro (234 TH/s, air-cooled)

Bitmain Antminer S21 Pro (234 TH/s, air-cooled)

Image: Bitmain.

You buy this direct from the makerWe design the room around it; we don't resell miners or computers.

Spec sheet (PDF)Maker's page

Open the spec sheet
Dimensions8.62″ W × 11.54″ H × 17.72″ D
Weight44.1 lb
AlgorithmSHA-256
Hash rate234 TH/s
Electricalvolts: 220-277 V AC, 50-60 Hz, single phase · amps: 20 · watts: 3510 · plug: Bitmain P14 inlet; ships with a C20-P13 cord, so it plugs into a C19 PDU outlet
Airflow / capacityHeat out about 11,976 BTU/h (3,510 W x 3.412). Airflow not listed on the spec page.
Noise76 dB
Where it goes in UNIT5.xyzShelf/rack at the back wall, intake facing the interior or a filtered intake louver, exhaust ducted or pointed straight out a wall exhaust/shutter fan; keep it below the door coil zone (nothing over ~70 in at the front). Needs the high-airflow exhaust package.
Warranty365 days from shipping when bought direct from Bitmain
Checked2026-11-02