BM1387 BM1387B Brand New & Original replacement ASIC chip for Antminer S9

BM1387 BM1387B ASIC Chip for Antminer S9 Hashboard Repair

The BM1387B is the original ASIC processor chip powering every Antminer S9, S9i, and T9+ hashboard. When your S9 reports declining hash rate, detects missing chips during diagnostics, or generates excessive hardware errors, a failed BM1387B is the most common root cause. This brand new, factory-sealed replacement chip restores full SHA256 hashing capability to the affected hashboard position.

BM1387B Chip Compatibility: Antminer S9, S9i & T9+

The BM1387B maintains pin-level compatibility across the entire S9 generation. Whether you operate original S9 units, the improved S9i variant, or the T9+ platform, this chip drops into any position on the hashboard without modification. The SMD package format matches the original BGA footprint exactly, ensuring proper solder joint formation when using standard hot air rework equipment.

Diagnosing BM1387B Chip Failures on S9 Hashboards

Before ordering replacement chips, identify which positions on your hashboard are defective. Connect the hashboard to a Universal Antminer Hashboard Test Fixture to scan all chip positions and flag failing units. The S9 hashboard contains 63 BM1387B chips per board — a single failed chip disables the entire board, so precise identification saves both time and inventory. For the soldering process, the BM1387 Universal Tin Fixture Stencil ensures consistent solder ball placement across chip pads.

BM1387B Specifications & Factory Quality Assurance

S9 Hashboard Chip Replacement Workflow

After identifying the defective chip position, remove the failed BM1387B using hot air rework or BGA desoldering equipment. Apply flux and position the new chip using the stencil plate for accurate alignment. Reflow the solder joints and allow the board to cool before testing. Run a full hashboard scan to confirm the repair before returning the board to production. If you maintain mixed Antminer fleets, our BM1387BE chip for S9j Hydro covers the water-cooled S9 variant.

Why Buy BM1387B Chips from LYS?

We source BM1387B chips directly from Bitmain's manufacturing supply chain in Shenzhen, guaranteeing authenticity and eliminating counterfeit risk. Every chip is factory sealed with full traceability. We ship via DDP worldwide — you pay the listed price with no hidden duties or customs charges. For bulk chip orders, contact us for volume pricing tailored to your repair operation.

Next Step: Get the BM1387 Universal Tin Fixture or contact our support team at contact@lys-sz.com or via WhatsApp for stock availability and technical guidance.