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I will overclock my Z9 mini today. Do you turn on the second fan ? Or let je de first fan more rpm ?
No need for a 2nd fan, just reverse your current fan so that it pulls air instead of pushing it through the unit and the miner will run about 10c cooler.
Read a little bit more and you will see you absolutely can !
Batch 2 can be overclocked as is with F12 on your browser . Looks like batch 3 cannot untill you flash it with a batch1 firmware
I have a batch 3 then but I dont have a Z9 mini from the first batch.