Antminer S21+ evidence-limited identity record

Evidence-limited identity record: Bitmain’s current power-supply and warranty references confirm that Antminer S21+ is an OEM product name. The durable manufacturer material reviewed did not provide a complete standalone specification sheet supporting the 216 TH/s, 3,564 W, and 16.5 J/TH values formerly published here.

Those performance values and the former noise, chip, dimensions, weight, temperature, release, price, lifecycle, tuning, and firmware claims are withdrawn until a durable exact-model specification or physical nameplate evidence can be cited.

What is confirmed

The current manufacturer PSU table associates the S21+ name with APW171215a/c or PW380a/b/c and a C20-P13 connection. That association confirms a product name and narrow accessory scope; it does not establish input voltage, current, performance, controller, recovery method, or parts interchangeability.

Do not collapse nearby names

S21+, S21, S21 Pro, S21 XP, and S21+ Hyd. are separate labels. A plus sign and a cooling suffix are part of the identity. Do not transfer a PSU, hashboard, controller, firmware package, recovery medium, tune, coolant requirement, or product listing between them.

Evidence required before specification use

Collect the complete nameplate, exact OEM document revision, PSU label, input rating, controller marking, cooling hardware, and installed version. A reseller title, calculator entry, or matching image is not enough.

Firmware, recovery, and repair

• Record the exact model suffix, board, PSU, and installed version.
• Do not select an S21, S21 Pro, or S21 XP package by analogy.
• For no boot, conflicting identity, package mismatch, interrupted writing, instability, or electrical and thermal symptoms, request Antminer diagnosis.

Return to the S21 owner’s hub.

Primary sources: Bitmain PSU and cord reference and the current manufacturer warranty model list. Reviewed August 27, 2026.