SEALMINER A4 Ultra Hydro vs SEALMINER A4 Pro Hydro

Both are hydro-cooled Bitdeer SEALMINER A4 models for SHA-256 (Bitcoin) mining, in the same flat 482 × 665 × 86 mm chassis (W × D × H), on the same three-phase 380–480 V AC supply drawing up to 17 A, with the same coolant requirements: 20–55 °C at the inlet, at least 10.2 L/min with pure water, at most 3.5 bar. Bitdeer rates the A4 Ultra Hydro at 886 TH/s on 8,372.7 W (9.45 J/TH) and the A4 Pro Hydro at 680 TH/s on 7,412 W (10.9 J/TH), both at 35 °C inlet coolant. The Ultra gives about 30% more hashrate for about 13% more power, so each terahash takes about 13% less electricity. Net weights are 21 kg and 20.5 kg. Bitdeer's tables give ranges of 870–900 TH/s for the Ultra and 630–730 TH/s for the Pro Hydro (±10%). The table below and the calculator work out what these figures mean with current network data.

Figures: Bitdeer specification pages for SEALMINER A4 Ultra Hydro and SEALMINER A4 Pro Hydro, checked 2026-10-10.