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Quick answer

The first digit groups the chip family and the rest is the board revision. For example Gamma boards are the 60x series (601, 602…), Supra are 40x, Ultra are 20x, Max are 10x. A higher revision is a refinement of the same chip — e.g. Gamma 601 and 602 both use the BM1370; the change is board-level, not a new chip.

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.

Bitaxe revision numbers look cryptic but follow a simple pattern: the leading digit(s) group the chip family, and the trailing digits are the incremental board revision.

SeriesFamilyChip
10x (100–104)MaxBM1397
20x (201–205)UltraBM1366
40x (401–403)SupraBM1368
60x (601, 602)GammaBM1370
650Gamma Duo2× BM1370
801GT2× BM1370

A higher revision in the same series is a board-level refinement — improved VRM, layout or thermals — running the same ASIC. So a Gamma 601 and a Gamma 602 are both BM1370 devices; the difference is in the board, not the silicon. This is why "601 vs 602" is a revision question, not a chip question.

What do the Bitaxe model/revision numbers (601, 602…) mean?

The first digit groups the chip family and the rest is the board revision. For example Gamma boards are the 60x series (601, 602…), Supra are 40x, Ultra are 20x, Max are 10x. A higher revision is a refinement of the same chip — e.g. Gamma 601 and 602 both use the BM1370; the change is board-level, not a new chip.

Sources: OSMU hardware revision history; cross-referenced chip mapping; designer credits (skot9000). · Last reviewed June 2026.

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Last reviewed June 13, 2026.