BM1373 / BM1373CC ASIC Chip – Antminer S23 Hydro Hashboard Replacement

BM1373CC ASIC Chip – Antminer S23 Hydro Hash Board SHA-256 Replacement

The BM1373CC (also referenced as BM1373) is the core SHA-256 ASIC chip tailor-made for the Antminer S23 Hydro miner's hashboard. Engineered for low power consumption, stable hash rate output and outstanding heat-dissipation behaviour, the BM1373CC is the standard replacement part for S23 Hydro hashboard repair — installed at the failed chip positions reported by the kernel scan or test fixture to restore the board to full hash rate.

BM1373CC on the Antminer S23 Hydro Hashboard

S23 Hydro hashboards run a chain of BM1373-series chips wired in series across the per-domain buck converters. A single dead chip breaks the chain and takes out the whole voltage domain in the kernel log; multiple dead chips across different domains usually point to either a thermal event or a power-rail fault rather than chip-level failure. The standard repair flow: read the failed chip positions from the kernel log or the BM1373 test fixture, isolate the board, re-tin the suspect pads, hot-air the failed chip off, place a new BM1373CC, re-flow, and re-verify on the test fixture before reinstalling the hashboard in the miner.

When to Replace the BM1373CC

Three symptom families on an S23 Hydro point at a chip-level fault rather than a power or cooling problem: (1) low hash rate against the spec'd target with the miner otherwise stable, (2) abnormal hash-rate fluctuation visible in the dashboard's per-board breakdown, and (3) offline / repeated reboot errors on a single board while the rest of the miner runs clean. In all three, swapping out the failed BM1373CC at the position(s) flagged by the kernel scan typically restores normal operation without any other intervention — and avoids the cost of writing off the entire hashboard.

Replacement Procedure

Pre-heat the S23 Hydro hashboard to 130–150 °C with an IR pre-heater so the PCB is brought up evenly before chip removal. Use a hot-air rework station at 340–360 °C with a small nozzle to lift the failed BM1373CC — the package is small and surrounded by tightly-spaced passives, so protect adjacent components with kapton tape. Clean the pads with flux and solder braid, lay down fresh paste matching the board's process (leaded or lead-free), place the new BM1373CC with vacuum tweezers respecting the orientation mark, then re-flow. Verify on the BM1373-series test fixture before reinstalling the hashboard in the miner and re-pressurising the coolant loop.

Why Chip-Level Repair Pays Off on S23 Hydro Boards

S23-class hashboards are expensive replacement units, and chip-level repair is the right economic call whenever the failure is isolated to one or two positions. A clean BM1373CC swap restores the board to its original hash rate, eliminates the hash-rate attenuation and downtime that come with degraded chips, and keeps the miner generating revenue instead of waiting for a full board replacement to ship. Across a fleet, the cumulative savings on board-replacement cost and downtime are the difference between repairing a site profitably and being forced to scrap usable hardware.

BM1373CC ASIC Chip Specifications

Related Antminer S23 Hydro / Bitmain Hashboard Repair Parts

• BM1370BC ASIC Chip – Antminer S21 Pro / S21 XP / S21+ / S21 Hydro
• Universal Antminer Hashboard Test Fixture – S19 / S21 / T21 Series
• DOWSIL TC-3080 8W/mK Blue Thermal Gel 1kg – Hashboard TIM
• Antminer S21 Hydro Water Cooling Heatsink Plate

Repairing S23 Hydro hashboards in volume or stocking a workshop ahead of fleet rollout? Contact us at contact@lys-sz.com for tray-quantity BM1373CC pricing. Worldwide shipping from our Shenzhen warehouse.