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Topic: Antminer Z9 mini overclocked - page 10. (Read 26121 times)

newbie
Activity: 3
Merit: 0
September 12, 2018, 10:26:24 AM
everyone, i'm pretty sure that Bitmain has restricted the VRM (voltage regulation module) to a certain voltage so that the chips will only run so high before they crash. more than likely, batch 1 was lesser restriction, batch 2 has more, and i guess batch 3 has a lot?! my assumption is that too many people were frying their miners from unresponsible OCing (because they either had a bad chip or was poorly cooled) and then warranty-claiming them back to Bitmain. i don't think there is any way Bitmain can tell that the miners have been OC'd unless there is a hidden log somewhere. the super-strip down version of linux that runs the miner is imprinted into ROM and reloaded upon each power-up cycle; the only changes it keeps (i.e. stratum, address, frequency, etc) is saved to a config file.

anyone who has experience OCing CPUs will know that at some point you need to up the voltage to keep going... well, in the case of these Z9M chips, you can't do that so as you OC the MHz up and up, it will hit a ceiling and crash. trip the VRMs enough times and the darn thing will go into a "i don't want to play anymore, i quit" mode where it won't hash at all and you will think you have bricked your miner. if and when this happens, just power down the miner, exhaust all the power from the miner, disconnect the psu, exhaust the power from the psu, and fire it back up (or just disconnect everything cables and all and let it sit off for 15-20 minutes).

if you want to go above what Bitmain has set, you will need to have some electrical engineering background or knows somebody who does and have some equipment, like a USB-PMBus dongle tool at the minimum to regulate the voltage as well as needing to solder some connectors to certain points on the PCB itself. this is no easy task as you need to be able to read electrical schematics let alone know what the hell you're doing so you don't fry your boards on the first power-up after you mod it. FPGA-guys are already doing this as they really need to regulate voltage when they push their chips while mining. of course this isn't the only way as the direct interface to the PCB may allow modification.

also, heat is going to be an issue if you can actually accomplish what i mentioned above. just like OCing CPUs, the higher it goes, the better fan heatsink or waterblock you better have. i recommend liquid immersion but that's just me. if you disregard this, your chip will fry really quick.

either way, take what i said with a grain of salt cause i am still a noob in regards to this forum and have zero trust so what do i know, eh? just an observation, nothing personal, hehe...

i'm pretty sure at least 99% of you Z9M owners will not be attempting this and the ones who have done this will keep it to themselves and not share out. why give more hashing power to the rest to increase difficulty, right? welcome to the world we live in. happy mining!

 Wink Cheesy Grin Roll Eyes

I'm thinking you may be correct.  It's also possible they may have skimped on MLCCs (power supply decoupling capacitors) in the newer batch, thus creating more ripple voltage at the chips, and lower overclocking potential.

The MLCC market is EXTREMELY tight right now, and prices are going up, and availability is way down.   

So it may be as simple as replacing a few capacitors per hashing chip.   I began to suspect this because I own an electronics manufacturing company, and am an electrical engineer.    But I have yet to verify (or attempt to verify) my suspicion. 
newbie
Activity: 2
Merit: 0
September 12, 2018, 07:25:04 AM
Sorry for asking here.

I received two Z9 mini yesterday. One of them is mining normally. The other does not recognize hashboards. Any tips? Or should I forward it to Bitmain? I'm in Brazil, so if there was a solution without having to send to Bitmain, this would be the best alternative.

Tks!

Alexandre
newbie
Activity: 1
Merit: 0
September 11, 2018, 12:16:48 PM
Those batch1 or something else?

It is possible to overclock any batch.

Do tell. What hardware modifications made?
I've no problem pulling these outta the factory chassis and modding...

yes I know, my question was about the hardware change and not how to set 900 on frequency.

https://ibb.co/dx6LkK


On the right is the original hash panel. Left - changed.

The bottom line is that the chips should get extra power.
Detailed step-by-step instructions from me will not be, as long as I make money on these changes. Excuse me. My message was for those professionals who work with electronics. These people know that this is possible and how.

I want OC z9 mini 25K Sol . How many?
jr. member
Activity: 98
Merit: 4
September 11, 2018, 10:23:32 AM
Can a member with a high trust post a link to the may firmware , bitmain has taken it down.


File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee

http://ftp://file.bitmain.com/shop-bitmain/firmwares/Antminer%20Z9%20mini/Firmware/Antminer-Z9-Mini-201805262047-500M.tar.gz

(There should NOT be a "http://" before the link! I can't see the "http://" when editing)



FTP Server is not even up now. Anyone got a link to this on a google drive or someplace?



I hope this will do!

Uploadfiles.io
File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee

https://ufile.io/fwcqd

(This link should work for 30 days from now!)

Donations:
Bitcoin (BTC): 1HY5ZvPvx3fx5iA5cQKjw9ZuArse2STuCb
Litecoin (LTC): LZPmxZdoe8ZNL8av5CkPPBEEBJVdoFQbS6
Zcash (ZEC): t1d35jvkzKcWybpCqojZmgDZkcFC7iBwe8w
Monero (XMR): 48gVGMbZsAD5xtbpEpBKTJiDz6uMrnkTxjMcJGGFtore7i7wckSqmvYKfPVGQGab6U9kK76nGa91fhL SDvPfK4bYKkJaXeW
Pretty lame to beg for donations every time you think you are helping someone.

Yes "TGJ", it's pretty lame in your world.
I guess you dont't believe in "reward whom so deserve it!".

In my world it's possible that some people sometimes actually understand the time and effort I put in and the time and money they save/make thanks to me and my work. It's not like I expect everyone I try to help making a donation. Then I would not be in this forum trying to help!!!
newbie
Activity: 70
Merit: 0
September 11, 2018, 04:57:06 AM
My Z9 mini is not overclocked but I get 11.000 SOl/S. Not even 1 one time below the 10.000.
member
Activity: 118
Merit: 10
September 10, 2018, 11:23:25 PM
Just got my batch 2 Mini yesterday.  Ran it at 650 Mhz all night and had no HW errors and minimal pool rejects (using nanopool).  Getting around 14.8Ksol/s.  What's odd is I changed the cgminer.conf to set the speed to something higher but anything higher than 650 just gives me a really low hash rate, around 4.5Ksol/s, even 655 Mhz.  No HW errors, just slow hashing.  Anyone else experience this?


I noticed the Z9 mini seems to hash slowly unless you select speeds in specific increments. (usually 6 mhz) the only reason I know this is because after I experienced the same thing as you on my manually adjusted batch 2 mini, I looked at the OC options on my batch 1 mini and it looks like they usually let you select in increments of 6 or 7 mhz. I don't really know why but I'm guessing it's a memory timing thing. Try adjusting with the following exact increments until you get stability. 700, 693, 687, 681, 675, 668, 662, 650, etc.

I just got mine as well, I ssh to it and edited the config file to freq 550 and now its above 12 ksols up to 15 sometimes Smiley
newbie
Activity: 2
Merit: 0
September 10, 2018, 08:08:36 PM
Thanks!  Works like a champ!
TGJ
jr. member
Activity: 173
Merit: 5
September 10, 2018, 07:51:45 PM
Can a member with a high trust post a link to the may firmware , bitmain has taken it down.


File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee

http://ftp://file.bitmain.com/shop-bitmain/firmwares/Antminer%20Z9%20mini/Firmware/Antminer-Z9-Mini-201805262047-500M.tar.gz

(There should NOT be a "http://" before the link! I can't see the "http://" when editing)



FTP Server is not even up now. Anyone got a link to this on a google drive or someplace?



I hope this will do!

Uploadfiles.io
File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee

https://ufile.io/fwcqd

(This link should work for 30 days from now!)

Donations:
Bitcoin (BTC): 1HY5ZvPvx3fx5iA5cQKjw9ZuArse2STuCb
Litecoin (LTC): LZPmxZdoe8ZNL8av5CkPPBEEBJVdoFQbS6
Zcash (ZEC): t1d35jvkzKcWybpCqojZmgDZkcFC7iBwe8w
Monero (XMR): 48gVGMbZsAD5xtbpEpBKTJiDz6uMrnkTxjMcJGGFtore7i7wckSqmvYKfPVGQGab6U9kK76nGa91fhL SDvPfK4bYKkJaXeW
Pretty lame to beg for donations every time you think you are helping someone.
jr. member
Activity: 150
Merit: 3
September 10, 2018, 07:21:38 PM
Should I mine Zcash or Zen with a Z9 mini?

(By the way just flashed to the first batches BIOS and I can now OC the ASIC)
jr. member
Activity: 98
Merit: 4
September 10, 2018, 06:59:47 PM
Can a member with a high trust post a link to the may firmware , bitmain has taken it down.


File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee

http://ftp://file.bitmain.com/shop-bitmain/firmwares/Antminer%20Z9%20mini/Firmware/Antminer-Z9-Mini-201805262047-500M.tar.gz

(There should NOT be a "http://" before the link! I can't see the "http://" when editing)



FTP Server is not even up now. Anyone got a link to this on a google drive or someplace?



I hope this will do!

Uploadfiles.io
File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee

https://ufile.io/fwcqd

(This link should work for 30 days from now!)

Donations:
Bitcoin (BTC): 1HY5ZvPvx3fx5iA5cQKjw9ZuArse2STuCb
Litecoin (LTC): LZPmxZdoe8ZNL8av5CkPPBEEBJVdoFQbS6
Zcash (ZEC): t1d35jvkzKcWybpCqojZmgDZkcFC7iBwe8w
Monero (XMR): 48gVGMbZsAD5xtbpEpBKTJiDz6uMrnkTxjMcJGGFtore7i7wckSqmvYKfPVGQGab6U9kK76nGa91fhL SDvPfK4bYKkJaXeW
newbie
Activity: 2
Merit: 0
September 10, 2018, 06:30:33 PM
Can a member with a high trust post a link to the may firmware , bitmain has taken it down.


File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee

http://ftp://file.bitmain.com/shop-bitmain/firmwares/Antminer%20Z9%20mini/Firmware/Antminer-Z9-Mini-201805262047-500M.tar.gz

(There should NOT be a "http://" before the link! I can't see the "http://" when editing)



FTP Server is not even up now. Anyone got a link to this on a google drive or someplace?

jr. member
Activity: 98
Merit: 4
September 10, 2018, 05:03:46 PM
Just received my Z9 mini
I cannot overclock it, it only says balance.

Can someone tell me where to download batch one firmware?


https://bitcointalksearch.org/topic/m.45329101

good luck!
newbie
Activity: 168
Merit: 0
September 10, 2018, 03:55:54 PM
I can overclock to 750, but i set 700 now and work very stable @15.50 average.  Grin


Are you suggesting that the OC ability is more related to the firmware than the hardware? In other words a batch 2 ought to OC higher when flashed with a batch 1 firmware rather than using the browser trick?
It makes no difference If you flash it with May 18 FW or change the value in the batch 2 FW.. The other member is very luck if he is getting 700 out of a batch 2 Z9 Mini.. I am getting 643 or 650 and i have 1 on 662 max.
I would just flash the May 18 FW and text out what you have..
jr. member
Activity: 81
Merit: 2
September 10, 2018, 03:52:07 PM
I can overclock to 750, but i set 700 now and work very stable @15.50 average.  Grin


Are you suggesting that the OC ability is more related to the firmware than the hardware? In other words a batch 2 ought to OC higher when flashed with a batch 1 firmware rather than using the browser trick?
newbie
Activity: 58
Merit: 0
September 10, 2018, 02:24:21 PM
Just ssh into it and change the miner config
jr. member
Activity: 150
Merit: 3
September 10, 2018, 02:20:00 PM
Just received my Z9 mini
I cannot overclock it, it only says balance.

Can someone tell me where to download batch one firmware?
newbie
Activity: 11
Merit: 0
September 10, 2018, 12:42:25 PM
I can overclock to 750, but i set 700 now and work very stable @15.50 average.  Grin

member
Activity: 195
Merit: 15
September 10, 2018, 12:06:46 PM
I received a new batch 3, trick to oc with google chrome dont work... new firmware file system “Thu Aug 30”

Edit: try to restore a backup from batch2, all settings as restored, but frequency dont change.
did you try flash may 26 firm? Huh Huh Huh

Yes, now work perfect.
great! also try over clock? Wink Wink Wink
newbie
Activity: 11
Merit: 0
September 10, 2018, 12:02:22 PM
I received a new batch 3, trick to oc with google chrome dont work... new firmware file system “Thu Aug 30”

Edit: try to restore a backup from batch2, all settings as restored, but frequency dont change.
did you try flash may 26 firm? Huh Huh Huh

Yes, now work perfect.
member
Activity: 195
Merit: 15
September 10, 2018, 12:01:37 PM
I received a new batch 3, trick to oc with google chrome dont work... new firmware file system “Thu Aug 30”

Edit: try to restore a backup from batch2, all settings as restored, but frequency dont change.
did you try flash may 26 firm? Huh Huh Huh
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