Bitdeer

Bitdeer SEALMINER Bitcoin miners come from one of the few publicly traded companies directly challenging Bitmain and MicroBT’s dominance in SHA-256 hardware, backed by Bitdeer’s own vertically integrated mining operations rather than hardware sales alone.

The SEALMINER A2 delivers 226 TH/s at 16.5 J/TH, with a notably refined fan and airflow design that reduces noise by several decibels compared to typical air-cooled miners, a real consideration for anyone weighing a home setup. The A2 Pro pushed efficiency further to 14.9 J/TH at launch, available in both air-cooled and hydro-cooled variants, with the Pro Hyd reaching 500+ TH/s for operators with liquid-cooling infrastructure. Bitdeer’s newest A3 series goes further still, with efficiency down to roughly 12.5 J/TH across models scaling from 260 TH/s up to 660 TH/s — currently among the most efficient SHA-256 hardware available from any manufacturer.

Every SEALMINER targets the SHA-256 algorithm for Bitcoin mining, backed by Bitdeer’s standard factory warranty. For miners specifically prioritizing maximum efficiency per watt, the A3 series is genuinely worth comparing against Bitmain and MicroBT’s current lineups. Full specifications and current stock are listed below.