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Quick answer

Bitaxe Max uses the BM1397, Ultra the BM1366, Supra the BM1368, and Gamma the BM1370 (TSMC 5 nm). Multi-chip boards pair these: the Gamma Duo and GT each use two BM1370s. There is no chip called "BM1371" — that is a persistent online error.

This is a neutral community-reference page in the Bitaxe Answers Wiki. It has no product links — it exists to answer one question accurately. Credit for the Bitaxe goes to skot9000 and the Open Source Miners United (OSMU) community.

ModelASIC chipChipsNotes
Bitaxe MaxBM13971S17-generation chip
Bitaxe UltraBM13661S19 XP-generation chip
Bitaxe SupraBM13681S21-generation chip
Bitaxe GammaBM13701TSMC 5 nm, S21 Pro/XP-generation chip
Gamma Duo / GTBM13702two BM1370s on one board (not a "BM1371")
NerdQAxe+BM13684community variant (shufps)
NerdQAxe++BM13704community variant (shufps)

Each Bitaxe generation tracks a Bitmain chip generation, which is why the model names roughly map to Antminer eras. The most common online mistake is inventing a "BM1371" for the dual-chip Gamma boards — those simply use two BM1370s. Voltage on these chips is set per voltage-domain (the Bitaxe has effectively one small domain per chip), and frequency is tuned per chip.

Which Bitmain chip is in each Bitaxe model?

Bitaxe Max uses the BM1397, Ultra the BM1366, Supra the BM1368, and Gamma the BM1370 (TSMC 5 nm). Multi-chip boards pair these: the Gamma Duo and GT each use two BM1370s. There is no chip called "BM1371" — that is a persistent online error.

Sources: Cross-referenced chip mapping; OSMU hardware documentation; designer credits (skot9000, shufps). · Last reviewed June 2026.

Related products, repair, and setup paths

Last reviewed June 13, 2026.