Canaan has published new OpenWrt and MM releases for the A821, A831, A841, and A851.
AvalonMiner | OpenWrt | MM |
821 | | |
831 | | |
841 | | |
851 | | |
There are no published changelogs for each miner's
20190404 OpenWrt release at the time of writing.
The published changelogs for each miner's
2019-04-04 MM release are identical to each other. Here is the changelog for the A851's MM release:
Version 8511904-1ab9760
* Add support for HighPerformance/Balanced/Low power mode selection. Refer "Power Mode" item in luci "CGMiner Configuration" page.
The publication of these OpenWrt and MM releases correspond to Canaan's addition of new commits on April 4, 2019 to the
avalon8 branch of their
cgminer repository.
The most noteworthy of the new commits is commit
b2356a1, which adds user-selectable power modes. The new modes are set by the
--avalon8-power-mode command-line option, with values ranging from 0 to 5:
OPT_WITH_ARG("--avalon8-power-mode",
set_int_0_to_5, opt_show_intval, &opt_avalon8_power_mode_sel,
"Set Avalon8 power mode, range 0-5. 0: HighPerformance, 1: Balanced, 2: Low:."),
Values 3 to 5 appear to be unassigned as of this commit.
The high-performance mode appears to specify a target temperature of
87°C, a default voltage level of
10, and a maximum core clock of
875 MHz.
The balanced mode appears to specify a target temperature of
85°C, a default voltage level of
5, and a maximum core clock of
750 MHz.
The low-power mode appears to specify a target temperature of
65°C, a default voltage level of
-5, and a maximum core clock of
537 MHz.
As stated in the new MM releases' changelogs, these modes appear in the OpenWrt GUI
as a drop-down menu, with the high-performance mode
being the default.
