The BM1387E chip uses a brand-new original factory-sealed ASIC chip, which is used to replace the damaged hash board chip of the Antminer S9. A single S9 hash board has a total of 63 ASIC chips. If some of the chips are damaged, miners will not be able to obtain normal income, and there will be zero hash rate or low hash rate. It is recommended that you replace the faulty BM1387E ASIC chip immediately to ensure the normal operation of the miner.