Bitcoin Forum

Hi Guys,

Looks like Bitmain has released the new Antminer z11 for equihash mining.

Here is a link to the YouTube vid if you don’t want to watch:

https://youtu.be/ZvgjhyPUGos



https://pbs.twimg.com/media/D1__-A6UgAAhLRu.jpg:large



They also released the new 2nd gen chips for the antminer s17 pro!


https://pbs.twimg.com/media/D2Aavc2VYAUYPh9.jpg:large



What do you think about these two new miners? Releasing a 2nd gen chip already?

No, wait at least a month or 2. Just a marketing action to prevent people from ordering M20 from microBT.

Is the Z11 already sold out or has it just not started selling yet? At $1242 it's sub 100 day payback, though that's gonna change very quickly once these ship. Also it looks like zcash will fork in Oct? https://forum.zcashcommunity.com/t/the-final-nu2-blossom-network-upgrade-goals/32449

90% of equihash mining rewards is zcash, if it forks this asic is worthless. There's only 5 months of mining time till the fork.

Not alt all. Theirs Komodo that's the next best thing to zcash. I plan to mine this next with z9 mini now that bitmain has more powerful hardware.

Then theirs more skeptical projects like bitcoin private. Might be worth mining at low difficulty if you have z9 mini

It's sold out, I was awake when it dropped and able to purchase but decided against it.  Sold out in a hour, heard they only did sub 2000 units.  Not really sure what is going on with that fork.. what zec does and is suppose to do are two different things with a idiot dev like zooku.. we know this.

Wonder how the efficiency is going to be on the S17. I imagine the S17 series is just going to be in the same form factor as the current S15 and T15 cases, though I do wonder if the S17 Pro is going to be in a different form factor as well.

Those with the Z11 in the next few months will probably break even before Zcash forks (if it even will fork), though difficulty will likely continue to rise on ZEC as more of these units are released to the public.

There will not be 100 day payback or even 300 day payback.
These machines would be unprofitable, unless ZEC goes up 400%, in which case you could just buy ZEC outright.

Not sure how great these are, the the power to hash is not no better then a Innosilicon A9.  I have some z9s and mini z9s and I'm going to skip these.  Right now it would take 100 days to pay off, throw in difficulty rise with the threat of ZEC going back to GPU only mining its a big risk.

Like I said earlier. Worst case scenario you can mine Komodo. Not that huge of a risk. Kmd actually a good coin.

You don't know what real asic mining risk is until you preorder an obelisk dcr1 like I did.

I earned my money back on my Z9-Mini within three weeks.
Bought it with LTC and mined on Mining Pool Hub, auto-exchanging back to LTC.  LTC now isn't worth as much in fiat as it was then ($160/LTC) but I did earn back my initial investment, coin-for-coin.  Of course being lucky with a first batch helped.  Anyone ordering a short time later was S.O.L.  Not saying the manufacturer is greatawesomewonderful (I think their marketing practices are borderline criminal), rather highlighting alternative thinking in regards to return on capital.  Mining returns need not always be measured in USDollars.

Zcash ain’t forking, they love asics

hmmm I measure mine in USD.  But I have 18 Z9 mini and 36 Z9 and they have been paid for awhile now.  I am still 80 % GPU and really don't like ASICS but 200+ % daily profit on Z series is good stuff.  Even if its a small amount of $ the percentage don't change.

Check your "math" again.
No way and no how Z9 (not mini) first batch paid for itself.

never said batch 1

I bought them cheap and used.

How much was the z9 from bitmain, I remember ordering one then getting hit with the tariff, lol.

I ordered 4 of the Z11 and will pay the Trump tariff like most other Mericans who shop in China.  >:(

Please don't judge my stupidity.  

first batch right at 3300 before the tariffs, first batch, with PSUs.

Ugh.

-j

It was $2k batch 1, $850 batch 2. But $650 if you scoop up $250 coupons for $50.

For mini... not for Z9.

Batch1 Z9 was 3,442.64 shipped for me per unit before import tariffs of 26.5%.

-j

Any idea how much the Z11 will increase difficulty?

Hopefully you can mod this one  ;D

No clue based on not knowing the amount of units sold in this first batch.  But based on what we all know about bitmain, they will bury their customers, no way they let people make too much money back so depending on how coin prices go will determine how many of these they spit out into the market.

Anyone know a reputable place to buy these?

how is it even possible that this is under 2k€ and all other equihash ASIC are way more expansive?
Z9 used - around 1k€
ZMaster used = 1200€

Too bad a ZMaster is expensive used, the efficiency is about the same as a Z11.

In the US there seems to be a number of Ebay listings for Z11 preorders, though you're going to pay a pretty steep premium through those sellers as they jack up their prices due to import fees and PP/Ebay fees. Ebay provides you with very good buyer protection so there shouldn't be issues with buying on there unless you're buying from someone with 0 feedbacks.

You could also make a WTB post for a Z11 in the Computer Hardware section (click for link (https://bitcointalk.org/index.php?board=75.0)) on this forum. Always use escrow while buying and selling here if you choose to go this route.

First batch of Z11 has shipped.  Fedex tracking shows delivery on Monday but I am guessing there will be a few days delay for US customs to do their damage.

Aye, https://blog.bitmain.com/en/z11-shipping/2019-04-11.html and https://blog.bitmain.com/en/z11-shipping/2019-04-12.html

The date spread on these two shipping days are odd for the orders... the first one covers 2 weeks but is "only" 124 orders. Day 2 is 10 orders over right at 2 weeks also.

-j

I ordered from eastshore 3rd batch and it just got shipped.  I thought I'd be waiting another month.

It also does not say how many units per order.  My order was either 48, 49, or 50.  Payments all arrived at exactly the same time for these three orders.  My order was for 4 units.

Nice - I posted an update at the end of my "ZSeries" thread, but for posterity I'll toss a quick update here. I don't know if unlocks for the Z11 will be needed or not. It defaults to 718Mhz ("Turbo") mode on a fresh install, and 681Mhz in "Balance" mode. Beyond that, the firmware attempts to auto-tune the frequency.

The user cannot specify a frequency (there is an exception via the command line, but that is locked out).
A frequency specified in the cgminer.conf is ignored.
SSH is disabled.
The image is "signatured" so other firmwares cannot (easily) be installed.

I have an individual or two in the pipeline who are expecting to receive Z11s and I will test on them remotely to see if there is further "oomph" (ability) in the hardware with the software limits removed.

If there is more to be had out of the hardware, I will release a firmware for it -- or if there is a desire to actually be able to configure the unit as one desires instead of it being "automatic".
I do have the ability to bypass the signature checking, but if I do end up releasing a firmware will likely only support the SD card method for installation... I don't really want to release the first of my bypass methods into the wild for a couple of reasons.

-j

it is best if you live in the united states to establish a gray import through canada. it will be so much cheaper than buying it in ebay. in addition, defective shipments are often sold in ebay.
which after a few months of work break down.

You can try akminer.com

where are they located?

China. Don’t worry about the taxes, they usually take care how it is shipped.

My shipment of Z11 just arrived.  Installed the first one 5 minutes ago.

Freq is 731   

Mining on flypool.

Elapsed   KSol/S(RT)   KSol/S(avg)   FoundBlocks   LocalWork   Utility   WU           BestShare
5m57s   146.61           137.84           0                   309           87.83   1,405.24   0

Watch your frequencies -- it auto-adjusts. Will be interesting to see how/where it stabilizes. It is not clear to me if it continually adjusts frequencies or if it settles.

-j

All 4 have been running for about 3.5 hours and averaging about 140 KSol/S each.  So far, 2 of them have dropped the freq on one chain to 724.


Chain#   ASIC#   Frequency   KSol/S(RT)   HW   Temp(PCB)   Temp(Chip)   ASIC status
1           3           731           49.64           8      59                   80                   ooo
2           3           724           43.90           357   59                   81                   ooo
3           3           731           47.01           634   58                   79                   ooo

Interesting these are actually clocking hardware errors.

Would you be willing to send me a copy of the system log from one of your z11s? If so, I will provide you an email address.

I’m hoping having some log contest will help with understanding some of what they have implemented in my reverse engineering efforts.

I can generate an image that provides the same control as my Z9 and mini variants (ie manual control over each hashboard), but I would have to disable auto tuning on an initial release with the information I have so far... and who knows if more can be squeezed out of these things...

Thank you,

Jason

Sure.  PM sent.

A side question: how loud is it?

Thanks!

7 or 8 on my Fender amp  :)

They are pulling 7.1 amps each at 208 volts.  That is 1477 watts.  Think about 4 z9 minis running. To get rid of all that heat, you need a lot of fan and there are only 2 of them on each z11.

zcash mining difficulty spiked today at an all time high.  But now is back down low.  Looks like a lot of Z11s were delivered or else somebody in China is testing a lot of them before shipment. 

I also got hit with a $2127.01 charge from Fedex for the Trump tax on 4 units.  :(

If someone has A) teamviewer and/or B) (preferred) knowledge enough to create an SSH/web port forward AND C) knowledge enough to do a SD card based install on a Z11, I've got an image to start testing with and see what these things can do.

PM me A and C or B and C with a Z11 are true.

Thank you,

Jason

Is anyone getting more than 142KSol out of their Z11? If so, how much?

I have a theory that I need to prove as true/false that the auto-tuning functionality might be auto-limiting to prevent it from going above 142kSol and will auto-adjust frequency down to ensure that is the case.

-j

All 4 averaging 140KSol.    One is showing 156KSol /RT but it already has one chain downclocked.  Has been since yesterday.  My two units with a downclocked chain have not changed clocking.

Ok, thank you. If the downclocked chain still hasn't changed, can you confirm again please?

I have been able to test on a machine this evening. I can fully control these boards on these and I know that higher hash rates can be had by manually setting the clock vs. auto-tuning. That said, there appears to be a hash rate ceiling independent of frequency that I'm trying to figure out.

-j

https://releases.broked.net/Z11StockSSHNoSignature.zip

This is the stock Z11 firmware dated Tue Mar 12 19:47:06 CST 2019
+ SSH has been enabled
+ Signature checking has been removed for future firmware updates
+ Protection against the known antminer malware has been added
+ No Dev-Fee/Call-Home
+ No additional features or changes exist.

This can be used to enable AwesomeMiner to manage your Z11 ASIC.

SHAH256: 4c034f823a68d4a05254630a8082bad13136b3ae85399a3cfae2aac00227fb70  Z11StockSSHNoSignature.zip
MD5SUM : 393430f23dd7ac3db0740ef7acabcc6f  Z11StockSSHNoSignature.zip

That will need to be installed via SD card:

1) Format SD card 32GB or less as FAT32
2) Extract zip file contents to root of SD card
3) Power off miner.
4) Insert SD card, power on miner.
5) WAIT (30-60 seconds) for lights to go off to the right of the ethernet port.
6) Unplug miner, remove SD card.
7) Plug miner back in.
8) Enjoy.

Chain#   ASIC#   Frequency   KSol/S(RT)   HW   Temp(PCB)   Temp(Chip)   ASIC status
1             3              716   46.69               86      51                       72                ooo
2             3              729   40.95               19      53                       75                ooo
3             3              731   48.49               65      51                       73                ooo


all chains with same frequency after start - no change at all. Have to restart many times cause massive rejected shares (you can see "HW" errors are to much for my opinnion)

anyone has this problem too?

some seconds after reboot

Chain#   ASIC#   Frequency   KSol/S(RT)   HW   Temp(PCB)   Temp(Chip)   ASIC status
1             3                 716   43.57             1     42                        63             ooo
2             3                 729   43.08             0     44                        66             ooo
3             3                 731   41.61             2     45                        67             ooo

I think hardware errors are normal on this platform now; I've seen them on every system I've looked at so far.

Are you seeing "rejected" shares or "discarded" shares?

If you are mining against nicehash, you will see rejected shares.

-j

i have trouble with lot of rejected shares through miningrigrentals

https://www.miningrigrentals.com/rigs/126089

like you can see...rejected shares and hashrate went to zero - have to reboot the miner and after this...maybe 10-20 rejected / hour is normal and i dont worry about...but sometimes...90k rejected shares and only 30-40k accepted - could be pool related ?!

I would guess pool problem-- are you able to see what pools are being used during those rejects? .. I don't know how miningrigrentals works -- i don't know if they act as a pool front or if the user provides pool information.

i can set the pool...it´s only passthrough if no one rent this rig

and u use 2miners and also tried miningpoolhub

but why so many HW errors...my z9 mini´s dont have any HW shown after days

could it be, that the chain auto speed is to high

I think it is just part of how they are doing their ASICs here -- a HW error does not necessarily mean a fatal error. I will say that the higher you push a board, the more likely errors will occur. The key though is the hash rate (and ultimately share submission rate).

The DR5 and others throw lots of HW errors, but still hash/submit just fine. I personally use flypool and antpool (sigh) without issues on my Z units. Try it on another pool and see if you don't get the rejects... I will eventually release a firmware that will let you control the frequencies yourself, but until then that is the only suggest I personally have.

At this point in time, I think ignoring HW errors is ok -- when they occur, there are no errors in the system log that I've seen that would indicate an actual problem with the hashes, at least the ones I have looked at so far.

-j

I've been getting some rejected shares not too many, but enough to bother me. I tried nanopool and flypool both gives similar results. Then I turned my fans up as chip temps were running kinda hot 70C changed to fixed 80% fan. they r at 62C and it helped with hw errors. The 2nd 3rd chains that give me hw errors are staying at higher freq then 1st so chip temp was higher on them 2 chains. the increased fan helped with that so guys kick up the fans if temps r higher then 67C  if def lowered  hw errors for me . Thank you much efudd for your work so far kudos on quick fw with signature removal nice job 👍. I personally can't wait to be able to set my own freq to run more stable and voltage adjust wud be a BIG plus for sure. Bitmain shouldn't do this crap we buy these not rent so shud be able to configure as I see fit,same crap as cell phones finally letting people unlock their phones cuz if paid for them and own them. Big thanks and anyone here including me let's help efudd if needed, so we can control out miners ourselves not Bitmain picking our settings . 

Thank you for the feedback.

I worked on an updated Z9 image today and hope to get a z11 image which gives you control back (but no real overclocking yet... I can make the boards go a lot faster, but hash rate doesn’t change, just how quickly they get up to speed)..

I am thinking it will be dev-fee free for at least a couple of weeks and then be like 20-25 minutes a day. Hopefully I’ll be able to crack the last bit and actually get more hash out of these soon... I am only able to work remote on other people’s systems so far.

-j

Can you link me some stats to look at in chat? I am pretty sure you are on the discord...

My Z11 is mining at MinningPoolHub, Zcash and getting an accepted ratio of 99.72%. I tried NiceHash and it was around 90%. My average rate is 140.43 kH/s. I have not tried other coins yet but all seems to be running well.

https://i.postimg.cc/Y9LSMqjf/Z11mph.jpg

someone tested power consumption?

i got 7.2A = 1650W  ???

Had 10 Z11's on Antpools ZCash and very disappointed in first full hash rate.  Specifically, what Awesome Miner and the Z11's control panel show with regards to hash rate is far higher than Antpool advises.  So doing a test: 

5 on Antpool and
5 on ZHash

Only 5 hours in but hash rate is far better on ZHash.  Will update test over next few days.

Hi there, first time posting. Is anyone else experiencing a lot of hardware errors? My z11 has been up for 3 hours and over 1,000 hardware errors on one chain..

I got a local reseller from China, whose price is cheaper than the official website, and they can declare lower value for me to decrease or even avoid tariff, very reliable reseller.
They also have facebook group -"Asic miner buy& sell", where they will update daily price and show machine testing video.  
u can send inquiries to her if interested, highly recommend , below is their contact information:

Shenzhen Rumax technology
contact: Grace zhou
Email: gracezhou.rumax@gmail.com
Whatsapp:+8617875427757

hey, have u upgraded the firmware ?  Here is the new firmware link from bitmain, u  can have a try

https://file11.bitmain.com/shop-product/firmware/Antminer%20Z11/Firmware/00720190424201804548Vm3X531X063C/Antminer-Z11-fixed-718M-201904231321-sig.tar.gz

So high the tariff was . i paid no tariff for my 6 z11s as my agent in China declared just 95usd per unit for me. 6*95=570usd only, it's really good.

U can also ask my agent in China to help u next time, they are miner reseller in China.

Below is their contact information:
Shenzhen rumax technology limited
contact: Grace zhou
Email: gracezhou.rumax@gmail.com
Whatsapp:+8617875427757

Hey guys, there are also many miner resellers in China, i highly recommend my friend Grace zhou from "Shenzhen Rumax technology limited", their price is lower than official website and can declare lower value for me to deduct or avoid tariff. They can also test the miners for u before shipping in case of any defective parts of miners.

Below is their contact information:
Shenzhen rumax technology limited
contact: Grace zhou
Email: gracezhou.rumax@gmail.com
Whatsapp:+8617875427757

The price from my China reseller as below:
used Z9mini with psu: 194 usd
used Z9 with psu: 567 usd
Used A9 with psu: 895 susd

i think the difficulty of equihash mining will increase again when A9++ comes out.

I had to cut a check for 31k for the tariff on my z9 mini's. Worst decision I have made in crypto was to buy these. Should of just bought some masternodes

I'm still not sure what to order Z11 or Innosilicon  A9+ . The last is a bit costly and has a little less hashrate  (120Ksol/s vs 135 120Ksol/s) but, the way I see it,  A9+  is more  robust and relatively simple  to carry out prevention measures in regard of their long-term maintenance. Has anyone a difference   of opinion with me on that?

How are they with payback?
Do you believe that you can pay back the miner and still earn money on it?
Maybe it would be better to buy bitcoins right away?
It looks more win-win than buying an ASIC.