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[/quote] This a common occurrence or just something you noticed now? Likely not something to be worried about but can check to see hardware errors and  any other reported issue in your log. The S21 series have had their little run of issues, and finally is firmware is latest?

 This a common occurrence or just something you noticed now? Likely not something to be worried about but can check to see hardware errors and  any other reported issue in your log. The S21 series have had their little run of issues, and finally is firmware is latest?

 If this is the first time you noticed give them both a reboot and see if you get the same results.
[/quote]

Thanks for the answer.
The latest firmware, configured for the pool and saw 10-18% rejections, rebooting did not help and I had to move these ASICs to a regular PPS pool

[/quote]

 This a common occurrence or just something you noticed now? Likely not something to be worried about but can check to see hardware errors and  any other reported issue in your log. The S21 series have had their little run of issues, and finally is firmware is latest?

 If this is the first time you noticed give them both a reboot and see if you get the same results.
[/quote]

Thanks for the answer.
The latest firmware, configured for the pool and saw 10-18% rejections, rebooting did not help and I had to move these ASICs to a regular PPS pool