Posts Tagged ‘Antminer Z9 mini

Seems like Bitmain is resorting to tactics we do not like for their Bitmain Z9 Mini ASIC miners in order to push the sales of the new bigger Antminer Z9 SIC miner, like removing the options to overclock the newer batches of the devices. The initial Z9 Mini miners had a drop-down box that allowed you to easily select the operating frequency of the miner’s chips and since the Z9 Mini do overclock pretty well and work 100% stable with 50% increase in their mining performance it is something that you should do right after you get the device out of the box. The 10 K/sol Z9 Mini at 250W of power usage at the default 500 MHz can easily do 15 K/sol when overclocked to 700 MHz without problems at 350W and maybe even more if it manages to be stable at 725 MHz or even 750 MHz, though not every unit manages to do so.

How do we overclock the new Antminer Z9 Mini miners from the web-based interface when under Miner Configuration, Advanced Settings all we see under the Frequency drop down menu is Balanced that represents the default frequency of 500 MHz? It is actually really easy as what Bitmain seems to do in order to limit the overclocking functionality was to remove the options from the HTML code of the page, so you just have to edit the source code of that page and add the options yourself in order to be able to set the clocks higher. There are number of ways you can do that, but the easiest one probably is to just edit the page code on the fly using Chrome or Firefox and Save&Apply the settings directly, so the device starts to operate at the higher frequency. What you have to do is hover the drop-down box where only Balance is available and right click on it selecting Inspect or Inspect Element. You will see that there is a commented option for Turbo set at 550 MHz as a value, you can edit this one by removing the commenting brackets at the start and end of the line or even just change the frequency of the Balance option to let us say 700 MHz. Just select the line of code and right click on it choosing Edit as HTML from the pop-up menu and do the needed changes.

When you finish editing the line you just apply the changes and you will see them active on the webpage immediately, do not worry, the change is just temporary, so that you can click on Save&Apply to get the new operating frequency saved in the miner’s config file. After the page reloads the changes you have made to the code will be gone as they are not permanently saved. Our advice is to start at 700 MHz as everything should be stable there and you might have to manually increase the cooling fan speed to have thing run cooler and stable as you overclock. Then you can try increasing the operating frequency further to 725 MHz and 750 MHz in order to see if you can squeeze some extra performance with the device remaining stable.

The Bitmain AntMiner Z9 Mini running at 700 MHz should be able to produce about 15 K/sol average hashrate without any problems and continue to run without errors 24/7, so you an get 50% performance increase with just 100W of power usage extra for free. You can guess that Bitmain doesn’t want you to have that bonus and that is why they probably have removed the option from the web interface, though again it is really easy to still overclock your miners despite that. The interesting question here is if the new bigger and more powerful AntMiner Z9 ASIC miner will be just as easy to overclock and as overclockable at the Z9 Mini, or maybe Bimain will have it overclocked already when they ship the device…

Move away Antminer Z9 Mini, Bitmain is starting to sell the “full” Antminer Z9 that will supposedly offer 40000 Sol/s for Equihash mining at 1150W of power usage with deliveries starting at the beginning of September and priced at $3319 USD (PSU is not included). For comparison the already available Antminer Z9 Mini offered just 10000 at about 250W of power usage. On the other hand there is also the Innosilicon A9 ZMaster Equihash ASIC Miner that offers 50 Ksol/s at just 620 Watts of power usage, but at three times higher price and currently out is of stock.

Bitmain is currently showing only a rendering of the new device, not an actual photo, but it seems like two slightly longer Z9 Minis stitched together (maybe an extra chip or to per board). We already know that the chips used in the Z9 Mini are overclocking pretty well, so two Z9 Minis can easily reach 30 KSol/s at maybe about 700 Watts and three overclocked units can go for as much as 45 KSol/s with just about a Kilowatt of power usage. Considering this and the fact that the device apparently only has 7 PCI-E power connectors (6 for ASIC boards and 1 for the control board) we can easily assume that Bitmain may have achieved the high power usage with less chips that are already overclocked quite a lot. If they did do just that the price of the new “more powerful” units may not be justified and you should not be expecting to see a lot of headroom for improving performance like on the Minis.

For more information about the new Bitmain Antminer Z9 40K Sol/s ASIC Miner for Equihash…

We already knew this was coming, but ow it is official Bitmain’s Antminer Z9 mini for the Equihash mining algorithm used by ZCash (ZEC) and quite a few other crypto currencies is going to start shipping around 20-30th of June. Bitmain is taking pre-orders for these new ASIC miners for Equihash at $1999 USD without power supply and shipping cost and they are able to deliver 10000 Sol/s at 300W, so not that much faster compared to a powerful GPU mining rig, but at lower price and power usage… similar to what the upcoming Ethash ASIC miners from Bitmain are offering at the moment. One more mining algorithm is going to slowly move towards ASIC miners apparently, though for now it will remain viable to be mined with GPUs and may as well be in the near future as well… at least for a while.

It is interesting to see what will be the reaction from different crypto coins that use the Equihash mining algorithm including, but not limited to ZCash (ZEC) as the first one to introduce the algorithm and the largest in terms of network hashrate one using it at the moment. For instance Bitcoin Gold (BTG) apparently has plans to fork in order to remain ASIC resistant or at least it seems that way from their recent tweets. There are already quite a few more Equihash crypto coins out there and there will be a discussion on ASIC miners for Equihash for sure, the other interesting and important question however is if these Antminer Z9 minis are already produced and Bitmain is “testing” them before starting to ship them out to customers at the end of next month.

More about the upcoming Bitmain Antminer Z9 mini ASIC Miner for the Equihash algorithm…


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