Canaan Low Power Mode Update from April 4, 2019

Just wanted to share what I've experienced with this new Pi firmware and the corresponding MMC update. Quick heads up: You can grab it from their site. The best way to do it is to start by upgrading your Raspberry Pi first. Just go to system, flash the firmware, and point to the .img file you downloaded. After that, head to status, find the cgminer config, and choose LowPower mode. Next, go to status and mmupgrade to load that .mcs file you got. From my one test, before this firmware, one of my 841s was using 1285Ws to hit 13.3TH/s, which gives you an efficiency of 96.4 J/TH. After the upgrade and switching to LowPower Mode, it's pulling 750Ws and averaging 9TH/s, making the efficiency 83.3 J/TH. So now, the 841 is pretty much on par with the Bitmain S9s using their current firmware in terms of efficiency. I doubt the 841 is using ASIC Boost though. If it was, I think the numbers would be even better. Has anyone else tried this out or made any adjustments beyond what I've done?

Asciboost requires a chip designed with asciboost in it. None of the Canaan chips before the A10 have this.

The best I was able to do on the 851 is 102, I was able to get 94 a few firmware versions ago. I might be able to get better as I haven't gone to the lower limits of the frequencies yet.

Make sure your running the new April 04th 2019 firmware in LowPower mode.

I'm running the April version with custom settings, all the mode does is alter the same settings with the exception that you don't need to manually enter them. The best I was able to get efficiency wise on the April version was 102j/ths, in a previous version I believe it was February or January I was able to get 94j/ths on the same miners. Now this is on the 851 which have been a bit less efficient then our 841's from the beginning.