Antminer Z9 mini overclocked

[qalowe]

The most I can get out of my two Batch 2 machines is 687 (although 681 produces a higher hashrate) and 625. Anything over that and the third hashboard on both machines goes to 0 hashrate.

i just recived my 2nd batch. mine too. 3rd chain die at 681 or up.

What hash rate are you getting at 681 or close. Do you get hw errors on any chains or does it just hash at 0 when you go at or over 681

   
same here... what about flashing the may 2018 firmware on to it?.... my batch 1 runs fine at 750..17 sols batch 2 one board dies above 675 freq.. 14 sols...

I'm wondering if bitmain hasn't cherry picked hashboards for the Z9s over the minis in this batch?
In theory I'll have a Z9 next week to see how (if?) it overclocks.

I wouldn't imagine their yield suddenly going down across the board on OC stability.

This makes sense. I'm at least 95% sure that the Z9 is just 2 minis combined with a much higher stock clock frequency. Classic silicon binning.

Just noticed Bitmains support page has a firmware upgrade for the Z9 that changes the frequency from 500 to 550...so no overclocking i guess?

https://service.bitmain.com/support/download?product=Antminer%20Z9

Edit: and the manual states it has a fixed frequency of 500 Mhz

[not.you]

Just noticed Bitmains support page has a firmware upgrade for the Z9 that changes the frequency from 500 to 550...so no overclocking i guess?

https://service.bitmain.com/support/download?product=Antminer%20Z9

Edit: and the manual states it has a fixed frequency of 500 Mhz

Just so we are clear, you realize that is the Z9 full size you are talking about right?  The mini has a different firmware.

Regardless, I would guess OCing the full size will be a matter of figuring out which files to manually edit.

[qalowe]

Just noticed Bitmains support page has a firmware upgrade for the Z9 that changes the frequency from 500 to 550...so no overclocking i guess?

https://service.bitmain.com/support/download?product=Antminer%20Z9

Edit: and the manual states it has a fixed frequency of 500 Mhz

Just so we are clear, you realize that is the Z9 full size you are talking about right?  The mini has a different firmware.

Regardless, I would guess OCing the full size will be a matter of figuring out which files to manually edit.

Yes, I understand that. I was replying to the question of if the full size Z9 could be overclocked without modifying the firmware.

[not.you]

Just noticed Bitmains support page has a firmware upgrade for the Z9 that changes the frequency from 500 to 550...so no overclocking i guess?

https://service.bitmain.com/support/download?product=Antminer%20Z9

Edit: and the manual states it has a fixed frequency of 500 Mhz

Just so we are clear, you realize that is the Z9 full size you are talking about right?  The mini has a different firmware.

Regardless, I would guess OCing the full size will be a matter of figuring out which files to manually edit.

Yes, I understand that. I was replying to the question of if the full size Z9 could be overclocked without modifying the firmware.

Yeah I thought you might be actually but I wasn't sure since the start of that quoted conversation portion started with talking about OC'ing the mini.  Carry on friend!

[BitMiner247]

I don't know if this has been posted yet in this thread but you can overclock it by using google chrome to edit the frequency on the "Advanced Settings" page. The instructions are posted here in the description of this video.

https://youtu.be/XI31hHhvYzA

I've got mine running stable for the past few hours at 675m. I'm getting 14-15k sol. Any higher and I start to lose boards unfortunately.

[shaninium]

I don't know if this has been posted yet in this thread but you can overclock it by using google chrome to edit the frequency on the "Advanced Settings" page. The instructions are posted here in the description of this video.

https://youtu.be/XI31hHhvYzA

I've got mine running stable for the past few hours at 675m. I'm getting 14-15k sol. Any higher and I start to lose boards unfortunately.

Does that work if the miner resets or powers up again? Do you have to type it all in again?

[grinbuck]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

[shaninium]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

Sweet thanks

[htautosjay]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

Sweet thanks

now one will not run on 650 freq... could it be thermal cut off ?...

[shaninium]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

Sweet thanks

now one will not run on 650 freq... could it be thermal cut off ?...

It's a stability issue, unless your Temps are in the 80s,90s. I think bitmain ensured we didn't win the Silicon lottery , and picked only the most reliable chips for the z9, and not the z9 mini. Maybe if the 250 coupon was used , it made this worse too.

[BitMiner247]

Im curious to see what the larger z9 can be overclocked to and if they use the same chips as in these. Perhaps you're right maybe they picked the best ones for the z9 and used the rejects for the mini's.

I did have one mini from the first batch which has the same chip issue. I could only overclock to 550m before the middle board would drop out. My other first batch ones are all stable at 750.

So far my second batch ones are running stable at 675m for 10+ hours and getting 14-15 ksol which isn't too bad.

[grinbuck]

Im curious to see what the larger z9 can be overclocked to and if they use the same chips as in these.

They're most probably using the same chips. The manual for the Z9 mini says it has 12 chips and produces 10 KS/s. The manual for the Z9 says it has 48 chips and produces 40.x KS/s. Proportionally equal so most probably same chip.

[eviltuna]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

I get hardware errors on both my batch 2 units @ 750.

[htautosjay]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

I get hardware errors on both my batch 2 units @ 750.

mine wont even entertain anything over 681

[Sebahl]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

I get hardware errors on both my batch 2 units @ 750.

For me one hashboard just stops hashing if I go above 675. No hardware errors, just no hash.

[htautosjay]

Does that work if the miner resets or powers up again? Do you have to type it all in again?

Once you do it, the "value" of the option you modified is written to the configuration files. It stays permanent untill you change frequency again or reinstall the firmware.

Code:

<option value="750"> 750M </option>

The value="750" field is the one that's written to the config files. The "750M" is simply what is displayed and does not matter.

I get hardware errors on both my batch 2 units @ 750.

For me one hashboard just stops hashing if I go above 675. No hardware errors, just no hash.

we are all getting the same.. if you go higher it wont even begin to hash

[grinbuck]

I'll get a couple of Z9 Mini's delivered between the 5th and the 15th of September. Will update my overclock settings here.

[C3MINER]

Download Antminer-Z9-Mini-201805262047-500M.tar.gz from Bitmain support if you have batch 2 Antiminer Z9 mini. After updating it will show Sat May 26 20:42:30 CST 2018 for File System Version. Set frequency to 687M. I'm seeing 15.3 ~ 15.6 Ksol/s average. I set the fan to 75% as well. Running for 4+ hours atm with no issues. I believe the temperature of the Temp(Chip) has a lot with to do with the board dropping sol/s. I ran 700M at 65% in a 72 degree room yesterday for 3 hours but when I woke up the next morning only 1 of 3 boards were hashing. Will update status in the morning.

[Strovu]

I just received my first second batch Z9 mini too. I had 2 from the first batch both running at 750M (16.2 and 16.5 KH/s)without any problem since day 1 with fan to auto.

But my last one from batch 2 has the same exact problem as many here. I'm kind of happy to have found this thread and to realize I'm not the only one. I also thought that 681 was the max OC but after a few hours I lost a board going to zero. I am trying at the default 500M to see if the problem occurs too.

So Bitmain made sure they put the very best board in batch ones so they get some nice reviews all accross the net to sell more with batch 2 where they dumped all their faulty boards... And they will say... well only 10Khas/s is garanteed folks!

I hope I'm hallucinating and someone will just find a quick fix!

[Strovu]

662 was working ok all night, 15.1KH/s on the pool. Adn DIFF going through the roof right now: 20 millions!!!!