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Whatsminer KF1990E ASIC Chip – MicroBT SHA-256 for M73S Hashboard l3++ ASIC repair benches stocking universalWhatsminer KF1990E ASIC Chip New Generation MicroBT SHA 256 Bitcoin Chip for M73S Hash Board Repair The KF1990E is a new generation dedicated ASIC hashing chip from MicroBT, purpose designed for the Whatsminer M73S SHA 256 Bitcoin miner. It matches the M73S hashboard footprint exactly and is the standard replacement part for mining farm bench work on burned out chips, hash rate decay faults or otherwise malfunctioning chips on the board. Installed at