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Posts Tagged ‘BitcoinTalk

Efudd’s modified firmware for the Bitmain AntMiner Z series ASIC miners now supports the Bitmain AntMiner Z11 with its latest update to version 2.3, AntMiner Z9 is supported by version 2.2 and for the AntMiner Z9-Mini you need to use the version 2.1d. The modified firmware allows for more advanced overclock including frequency and voltage tuning with voltage controls per hashboard option available. With the modified firmware it is easier to achieve higher performance than with the stock firmware that has limited OC capabilities by Bitmain. According to the developer of the modified firmware 150+ KSol/s (up from the stock 135 KSol/s) should be doable with minimal tuning and further increase to 170-180 KSol/s might be achievable with more power, careful tuning, good cooling and some luck.

Do note that the modified firmware comes with a built-in 3% developer fee, so the miner will be mining for the developer 10 minutes out of every 330 minutes it is operating.

For more information and to download and try the modified Antminer Z9/Z11 overclock firmware…

It seems that just like with the newer Antminer Z9 Mini the new faster Antminer Z9 Equihash ASIC miners from Bitmain are arriving with locked overclock functionality in the firmware. We already know that these ASIC miners are overclocking pretty well and you can easily get a nice performance boost over the stock hashrate the devices come with, so why is Bitmain limiting you… it is pretty clear, they want you to buy more units. Fortunately there are alternatives that allow you to overclock your Antminer Z9 miners and get a nice extra performance boost. Initially there was only a modified firmware released by user efudd on Bitcointalk that was sold to interested people, but now there is also a free version of a modified firmware available with unlocked frequencies by smartass111. Of course you are more than welcome to make a donation to the author of the modified firmware in order to support and motivate him.

The new faster in terms of hashrate Bitmain Antminer Z9 ASIC miners do seem to be more limited in terms of operating voltage, so you will most likely will not be able to overclock them as much as a Z9 Mini, but still going from the default operating frequency of 500 MHz to 625 or 650 MHz should be possible on pretty much all miners. If you are lucky you might be able to even squeeze some more extra as well, just make sure you keep the chips cool enough when you start to overclock and also to have a powerful enough power supply that can handle the extra load that it will get after the overclock. Getting an extra performance boost of 20% or maybe even a bit more for free is something that you should definitely take advantage of if you have some Antminer Z9’s.

For more information and to download the free modified Antminer Z9 OC unlocked firmware…

The Xevan algorithm used by BitSend (BSD) has finally recieved a GPU miner for Nvidia-based mining rigs with the ccMiner fork by krnlx (source). Unfortunately for the moment the code of the miner only compiled and works under Linux, though hopefully soon things will be ironed out and a Windows version will also be available. For a Xevan AMD GPU miner check this older fork of sgminer available for both Windows and Linux OS with precompiled binaries. The Xevan algorithm is essentially a dual X17 with 128 bit headers, but it wasn’t that easy to implement apparently or there weren’t enough incentive up until now apparently.

The ccMiner fork from krnlx is reported to provide 3.3+ MHS on Nvidia GeForce GTX 1070 and around 6 MHS on Nvidia GeForce GTX 10880 Ti GPUs according to the author. Owners of Nvidia GeForce GTX 1060 mining rigs are advised to set the intensity manually in order to have the miner work properly with their hardware, GTX 1070 and GTX 1080 Ti should work fine with the default intensity of 20. If you are interested in how the Windows version is coming, then you might want to check out the official thread about the miner on Bitcointalk.

Update: Windows binary is now available thanks to Palgin, you can download a 32-bit Windows binary, VS 2013, CUDA 8.0 here.

Check out the announcement thread for the ccMiner fork with Xevan support on Bitcointalk here…


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