Quote from: tbolt on July 28, 2015, 04:10:33 PM

Quote from: RichBC on July 28, 2015, 08:17:25 AM

@tbolt Looking at your results I feel the Core voltage must be changing as I cannot see that anything else could give such a big change in power consumption.

My measurements all relate to S3 & S3+ which I think have similar hashing boards to the C2. There is BTW at least as much uncertainty in the S3 threads as to weather it is possible to reduce the core voltage with the software. I have the schematic for the S1, have not seen one for the S3 but they are similar. I am definitely measuring at the correct place, the output of the Buck Converter after the large inductor and even with the correct firmware, Bitmain disabled voltage adjustment in the latest, it does not change. Yes to Save & Apply and power off & restart.

Do you have a picture of the hash board in your C1 showing the buck converters to compare to the S3?

Thanks

@RichBC

These are the only images that I have of the C1 hash board.

https://bitcointalk.org/index.php?topic=846095 for PCB pictures of the original version.