Two hashboards of S9 both passed the single-board test, but the whole miner only had 2Th/s, one of the two boards without hashrate.Testing with an extended ribbon cable yields normal results.



77022.44USD
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2095.08USD
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655.75USD
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During the single-board test, increase the frequency in the fixture configuration file and test again to see if the chip with low hashrate can be identified. Replace that chip accordingly.
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