The firmware is free. dev fee 1.3-2% of total hashrate. At the same time, there is no stopping of the main mining, the dev fee mining goes in parallel, with no switching loss, no more than 2/100 of the entire work.
On all Bitmain Antminer S9 S9i S9j models starting at 12T with Xilinx controller.
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For S9 and T9 +, the normal operating temperature is 55-85C °, critical in datasheet bitmain 120C °, but we believe that up to 95-97C °
For D3 / L3 + / L3 ++, the critical temperature of the chip is 80C °
+ \ - 5%, we tried so that he did not understate the testimony, so as not to exceed the capabilities of your power supply. If the temperature is elevated, or many chips have an individual frequency setting, it is possible that there is much difference with a real wattmeter.
Of course! Standard Upgrade procedure.
Install the firmware, without saving the settings https://file11.bitmain.com/shop-product/firmware/Antminer-S9-all-201705031918-550M-user-Update2UBI-NF.tar.gz which will completely format the flash memory when this will change the mac address and the router will most likely issue a new IP address. You can find antminer on the router in DHCP clients, or using the BTC Tools v1.2 utility to scan the network.
Click on the General settings menu (where your pools are configured) at the bottom of the Save & Apply page or launch Autotuner.
After 24 hours of work, you can calculate the exact% dev fee:
1. Dev fee basic from 1.3% to 2%.
2. Reserve address dev fee, in case the primary is not available.
3. Power usage readings of each hashboard and total.
4. The number of DiffA# (work performed worker) user antminer.
5. DiffA# (work performed by worker) Dev fee.
6. The sum of the total work done DiffA#.
Answer: To change S9 to S9i or S9j, you need to install the Patch as a firmware update with saved settings, links below.
Patch for S9i https://www.dropbox.com/s/czyr338pfho70… ar.gz? Dl = 0
Patch for S9j https://www.dropbox.com/s/yv5oci3i8lzox… ar.gz? Dl = 0
Bitmain in the newest firmware has done a digital signature check.
You need to change the upgrade.cgi file as follows, or edit it via SSH vi editor
vi /wwww/pages/cgi -bin/upgrade.cgi or use WinSCP programm and its embedded editor
Default SSH user:root password:admin