BM1370BC Bitmain ASIC Chip for Antminer S21Pro S21XP S21+ Hydro
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BM1370BC Bitmain ASIC Chip | 5nm SHA-256 Replacement for Antminer S21 Pro / S21XP / S21+ / S21XP Hydro Hashboard Repair
The BM1370BC is the 5nm-process SHA-256 hashing ASIC used on the Antminer S21 Pro, S21XP, S21+ and S21XP Hydro hashboards — Bitmain's flagship 2024 lineup. Drop-in replacement when an original BM1370BC fails: restores the hashboard to full hashrate, avoids the cost of a complete board replacement, and keeps the ROI window on the miner intact.
The 5nm process node delivers higher hash rate per watt than earlier generations, and the chip's electrical envelope is tuned for the S21 series' aggressive power-efficiency targets. Each chip is a single point in the serial chip chain — when one fails the chain reports incomplete and the board drops to low or zero hashrate. Identify the failing position with a test fixture, desolder, reflow the replacement, and the board returns to normal duty.
When to Replace the BM1370BC
- S21 hashboard reports low or zero hashrate — chip chain incomplete on one board while other boards run normally.
- Chip count mismatch in chain scan — diagnostic tool flags the failing position along the BM1370BC chain.
- Visible damage on a chip — burnt, cracked or delaminated package after a thermal or transient event.
- Single-board failure after a known fault event — short, power surge or coolant intrusion likely killed one or more chips along the chain.
- Fleet refurbishment — chip-level replacement on used S21 boards entering the refurbishment queue.
BM1370BC ASIC Chip Specifications
| Feature | Specification |
|---|---|
| Model Number | BM1370BC |
| Manufacturing Process | 5nm technology |
| Algorithm | SHA-256 (Bitcoin, Bitcoin Cash, etc.) |
| Compatibility | Antminer S21 Pro, S21XP, S21+, S21XP Hydro |
| Function | Primary hashing ASIC chip in serial chain |
| Replacement Type | Drop-in — same package, same pinout |
| Mounting | SMD reflow with stencil + paste |
| Required Repair Tools | BM1370BC tin stencil + tin tool, heating table, microscope |
| Package Finish | Black package |
| Condition | Brand New / Original Bitmain |
FAQ — BM1370BC Replacement
Q: Is the BM1370BC interchangeable with earlier BM1370 variants?
A: The BM1370BC has a specific binning envelope tuned for the S21 Pro / S21XP / S21+ / S21XP Hydro production runs. Earlier BM1370 sub-variants may not match the signal or power envelope. Match the part number stamped on the failed chip before ordering.
Q: Does the BM1370BC fit the standard S21 (non-Pro / non-XP) as well?
A: The standard S21 typically uses BM1368-series chips. The BM1370BC is targeted at the higher-bin S21 Pro / S21XP / S21+ generation. Verify your board revision before ordering.
Q: What test fixture do I use to verify the chain after replacement?
A: The BM1368 / BM1370 series ASIC chip tester runs the standard pass/fail validation. Pair it with the matching tin stencil for the complete chip-replacement workflow.
Q: Bulk pricing for repair shops?
A: Yes — email contact@lys-sz.com with your monthly volume. Tray quantities are stocked.
Related products
- BM1370BC ASIC Chip Tin Tool – Antminer S21 Pro
- BM1370BC ASIC Chip Tin Stencil – Antminer S21 Pro
- BM1368 ASIC Tester – Antminer S21XP / S21 / T21 Hashboard
- BM1368AA ASIC Chip – Antminer S21 / T21 / S21hyd
Repair shops sourcing BM1370BC chips by the tray? Email contact@lys-sz.com for bulk pricing. Worldwide shipping from our Shenzhen warehouse.
Buying in bulk for a mining farm or repair shop?
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