About firmware versions and overclocking:

I've been doing some serious digging!!!

When you login to your Z9 mini you check on first page "System - Overview"
Batch 1, 2 and 3 all seem to have "Hardware Version:" = 9.0.0.5

"File System Version:" tells you which firmware version your Z9 mini is running on.

There are at LEAST four (4) different firmware versions for z9 mini:

1. Sat May 26 20:42:30 CST 2018 = Antminer-Z9-Mini-201805262047-500M.tar.gz
2. Sun Aug 12 17:43:41 CST 2018 =
3. Thu Aug 30 14:57:48 CST 2018 =
4. Fri Aug 31 17:02:59 CST 2018 = Antminer-Z9-Mini-NAND-500M-201808311812.tar.gz (the now only downloadable fw on Bitmains site for z9 mini.)

May 26 and Aug 12 firmware-versions are overclockable either from SSH into machine and changing the file "/config/cgminer.conf" or from Chrome using "Inspection" for the field where you choose "frequence" (May 26 version) alt. "mode" (Aug 12 version) on page "Miner configuration - Advanced settings" and for the May 26 version ofcourse you just choose the frequence here you wan't just like God intended !

Aug 30 and Aug 31 versions just ignores any frequence value from cgminer.conf or with Chrome's "Inspection" method.
If you go to the "/www/pages/cgi.bin/minerAdvanced.cgi"-file and changes value and saving after you made filesystem writable. After reboot it will have changed the file back!!!


Batch 1 seem to be very overclockable !!!
I, myself, are running my single batch 1 Z9 mini on 768 MHz and it's solid !!!


For Batch 2/3 I have seen quite a few running them on 668 MHz solid with both fw May 26(after upgrade) and Aug 12 firmware's !!!


WHEN you install the May 26 firmware I strongly recommend you UNcheck "Keep settings:" to get as clean install and as little problems as possible.


I really recommend you checkout mining at prohashing.com dispite their "high fee" (not high in relation to what I earn compared to MPH, nanopool and flypool after 48 hours, at least for me and my friends.) Read under "Help" on prohashing.com for further info and earning possibilities if you choose a single coin to hash.)


Pool settings for prohashing.com: (here you can see mine)
Url : stratum+tcp://prohashing.com:3336   (3336 is for Equihash algorithm that z9 mini calculates)
Worker : imine2   (the username I registered with at prohashing.com)
Password : n=z9mini101   (the "101" stands for machines ip:10.0.1.101 in my home network and it's just a name to identify your machine if you have more then one.)


File: Antminer-Z9-Mini-201805262047-500M.tar.gz
sha-1: 8791eee569dfff728c8363e5d8fd93f68957a2ee
https://ufile.io/fwcqd
(This link goes to the May 26 firmware which I've shared at Uploadfiles.io and should work for 30 days from september 10, 2018!)


Donations - I hope all my hard work will help up your earnings:

Bitcoin (BTC): 1HY5ZvPvx3fx5iA5cQKjw9ZuArse2STuCb
Litecoin (LTC): LZPmxZdoe8ZNL8av5CkPPBEEBJVdoFQbS6
Zcash (ZEC): t1d35jvkzKcWybpCqojZmgDZkcFC7iBwe8w
Monero (XMR): 48gVGMbZsAD5xtbpEpBKTJiDz6uMrnkTxjMcJGGFtore7i7wckSqmvYKfPVGQGab6U9kK76nGa91fhL SDvPfK4bYKkJaXeW

This means with a block reward of 10 ZEC you actually get 8 ZEC?

It's really up to you man, whichever coin you believe in most. However you should note that a few other folks in I think this thread have said that MPH Autoswitch doesn't seem to be nearly as profitable as expected and that mining coins directly seems better. Any of those coins you listed should be fine for profits, however I personally wouldn't mine ZEC because of the 20% tax.

I am using Zhash for ZEN without issue. I seem to be getting just about what my expected rewards are day to day.

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?

Auto keeps mine @ 67 or lower.  What temps are you seeing?

That's good to hear.  I had something odd happen. I got my Z9 mini yesterday.  I used the browser trick just to set to 550 up from 500 and after about 45mins I had Xs for all 12 chips.  I set back to 500 and now it's been running for almost 12 hours at around ~10-11 KSol/s.  So I got what I paid for, but it seems weird that even most of the batch 2s were getting over 550 without issue and I can't even get that high.  Oh well....  I'm hesitant to mess with the firmware.

Zergpool has switching on the smaller Equihash coins. Most of them except ZEC and ZEN. Been doing pretty good so far.

What speed are you getting with that firmware and where can I find the May firmware version? Thanks in advance!

What issues

Tried factory reset???

Ship to a newbie? Thanks but no thanks. No way I'd ship to anyone but a community vetted long term member even if @Hitsxx did it for free. Happy with my puny 15.5 Mh/s. Besides, it's just a matter of time before one of the more knowledgeable, experienced and long term (not to mention generous and community oriented) members in this forum post details of the mod anyways. If it even works stably - which is just a claim at this point in time. A couple pictures is all that @Hitsxx has to prove it.

Send to PM.

Of course we can. But there is a problem - the devices must come to us.

At these capacities, cooling optimization is not required. And there is no good possibility. In the initial system, the optimization depends on the ratio of the area of ​​the crystal and the volume of the surface of the radiator.

But we will experiment with liquid cooling and increase the speed to 25 kSol (or higher).

Any package is overclocked. But this is not an easy decision.

That should do it.. just plug one PSU into one bank and the other in the other bank..

for just over a $100 i invested in another PSU from Bitmain to power the Z9.

I love the idea of auto switching, if you decide to go that way PLEASE PM me again with a idiots guide on how to...... (Like you did last time). Really very many thanks!

Reading on tinterweb, it is locked to Balance as these Mini's are, but the Google workaround seems to be working on Big Bruv Z9. I have just placed an order for one. Ships late Sept.

I wouldn't rush into ant more Z9 Minis.. I think wait and see if the big boy will OC