S9 Chain Freq not the same on all boards

[100sIg00sI]

Chain 8 has a higher freq than 6 and 7.

Would there be a reason why someone would have modified the unit to run higher on one hash board?

Can I change this one board back to match the others?

Unit runs fine on pools

Solo via BFGMiner on Stratum proxy it restarts every 15 minutes - Also solo R/T hash rate is 13.5 while AVG hash rate is 4x that around 53 any ideas why that would be?

Latest 2019 Firmware installed

6 63 606.00 4,352.29 4,301.09 1 - 54
7 63 606.00 4,351.08 4,376.64 0 - 46
8 63 655.23 4,565.78 4,792.08 0 - 48

Total
189 622.41 13,000.00 13,469.81

[BitMaxz]

I think it's a normal freq for this miner you can set it manually on different firmware but for your current firmware(2019 firmware) I think you can only able to customize the hashrate by going to "miners configuration" and set the working mode to higher or low power mode. If you don't know how to do that you can find the guide from this link below.

- https://support.bitmain.com/hc/en-us/articles/360023715154-Instructions-of-new-multi-option-firmware

Or if you want to modify the frequency of each hashboard you will need modified firmware like the firmware from this link below

- https://bitcointalk.org/index.php?topic=5127323.0

[mikeywith]

6 63 606.00 4,352.29 4,301.09 1 - 54
7 63 606.00 4,351.08 4,376.64 0 - 46
8 63 655.23 4,565.78 4,792.08 0 - 48

Did you buy it used? I think I remember someone saying the frequency and voltage settings are probably stored in the EPROM of each hash board, so there is a chance that this board was taken from a different miner, I don't think this causes any issues, the reboot probably comes from something else, but if you want to fix it you could use the fixed frequency firmware version if that does not work you might need a custom firmware.

Why do you use BFGMiner anyways?

[100sIg00sI]

I did buy it used so anything is possible there

I am using BFGMiner to solo mine, I don't want to pool necessarily, I like the lotto aspect of mining, don't even care if I ever mine a block. Trying to learn more about the mining process, low level

When I use my S9 on CKPool or F2Pool it works just fine.

When I direct my S9 to my stratum proxy BFGMiner it works fine with the exception that it reboots every 15min

I've watched the kernel log right up to reboot nothing reallly stands out there

The one thing that does stand out:

GH/S(RT)        GH/S(avg)
8,522.037       32,435.59       These numbers were taken with chain 8 disconnected to see if it was causing any issues. But the difference of about 4x between RT and avg remains the same with chain 8 online.

This exaggerated GH/S(avg) is the only thing I see different between pool mining and solo mining

Has anyone seen this issue and have any recommendations? Stratum proxy settings need tweaking?

thanks

[Artemis3]

Ever since the AUTO firmwares from 2017 there is no point in using a "single" frequency, and its not like all 63 chips on each board are using the same frequency anyway, so this is perfectly normal. You might just have a better hashboard in there too.