Antminer Z9 mini overclocked

[0ethereum0]

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.

I have the batch of 5-10 september I can not overclock it. I discovered that a couple minutes ago 

[1537617865]

1537617865

[1537617865]

1537617865

[melpheos]

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.

I have the batch of 5-10 september I can not overclock it. I discovered that a couple minutes ago  

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

[God is back]

Anyway I overclocked with the old firmware to 718 frequency.
I get this

ASIC STATUS
Chain 1 0000
Chain 2 X000
Chain 3 0000

I tried everything to restore to have all the chains working.  A Perform Reset, a Restore Backup and recharge the new firmware but nothing that can work.
Seems under 650 all the Chains give me 0000 but is not worth. So like told previously at the moment NOTHING can be done to have all the Chains working with an HIGH FREQUENCY except that lower the frequency.
Otherwise the other miner give me all the Chains working with a 687 frequency.
It's a mistery really

[0ethereum0]

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.

I have the batch of 5-10 september I can not overclock it. I discovered that a couple minutes ago  

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.

[God is back]

Anyway reverse the fan will fall the warranty. So make it at your risk.

[d.v.]

Reversing the fan is a bad idea, see here - https://bitcointalk.org/index.php?topic=3509006.msg43559339#msg43559339

Let the original design be.

do not reverse the fan. the temp sensor is on the far end of the board where the air exhaust out of and if you reverse the fan, cold air will hit the temp sensor first giving false cooler readings so the fan will slow down and be more quiet but your chips will be running hotter than reported in the GUI.

i know we all hate bitmain but they didn't make an asic to fail and die to get warrantied back.

[God is back]

Reversing the fan is a bad idea, see here - https://bitcointalk.org/index.php?topic=3509006.msg43559339#msg43559339

Let the original design be.

do not reverse the fan. the temp sensor is on the far end of the board where the air exhaust out of and if you reverse the fan, cold air will hit the temp sensor first giving false cooler readings so the fan will slow down and be more quiet but your chips will be running hotter than reported in the GUI.

i know we all hate bitmain but they didn't make an asic to fail and die to get warrantied back.

Following your suggestion, hashrate is not increasing, just the temperature is going down. So well thinking it's not worth reverse the fan. Going back to the original configuration.

 

https://www.youtube.com/watch?v=50VDbkgVzQM

 

[ZEDIX360]

One of my board is not present or dies after overclocking at 750......they use to go ok for 1 week at 700   and when i try to jump at 750 1 board crash...So i put back the original firmware to try to repair it and nothing change...i wonder if it s the hashboard or the controler board....Any soluce?

Thanks a lot

[masrobots]

One of my board is not present or dies after overclocking at 750......they use to go ok for 1 week at 700   and when i try to jump at 750 1 board crash...So i put back the original firmware to try to repair it and nothing change...i wonder if it s the hashboard or the controler board....Any soluce?

Thanks a lot

It's a trial and error process. Your ultimate results will depend on which batch you purchased, how cool you're keeping the miner/room, and some luck. To troubleshoot, I always first reboot the miner and keep an eye on it. If it can't hold the freq that it used to be able to handle, then I try to figure out what changed. In all of my similar situations, the change was always the temperature in the room (one time I moved a miner to a hotter location, another time the A/C went out). Once I got the miner back to the same room temperature conditions it was in before, it worked like before. These boxes are a little finicky at the higher freq.

[hashestohashes]

My batch 2 mini started off OK t 675 or so, but after days it went down, and now it's clear down to 662 or so, testing that now.

[Tailgunner]

how cool you're keeping the miner/room, and some luck. To troubleshoot, I always first reboot the miner and keep an eye on it. If it can't hold the freq that it used to be able to handle, then I try to figure out what changed. In all of my similar situations, the change was always the temperature in the room (one time I moved a miner to a hotter location, another time the A/C went out). Once I got the miner back to the same room temperature conditions it was in before, it worked like before. These boxes are a little finicky at the higher freq.

Yep, doesn't make sense to me because they never go above 70c. yet when they do die it's only during the hottest part of the day despite regardless of fan setting.

[fanatic26_]

so why does everyone think they are entitled to this massive overclock on these?

People seem genuinely confused and offended that their machine can only overclock 50% over the advertised rate.

No one promised you anything but 10k sols, if you get even a fraction more than that you should be happy.

Instead people want to try and RMA machines that dont overclock enough for their liking?

[johndoe1337]

where can i download a legit batch 1 firmware?

[Sacsayhuaman]

We managed to OC some of our Batch 2 devices up to 706 with stable hashrates for 19hrs. We are very excited about the results.

https://abload.de/img/2018-09-22_083403c5e0c.jpg