Quote from: zipiju on November 05, 2013, 09:54:08 PM

Quote from: Rakessh on November 05, 2013, 07:14:22 PM

Quote from: zipiju on November 05, 2013, 06:52:27 PM

Quote from: chadtn on November 05, 2013, 06:30:20 PM

Quote from: jesse11 on November 05, 2013, 06:03:16 PM

Yes morris14ccm, Plug it in to the PSU and USB to Computer. Download CGMiner 3.7.0 and run it.
running 360MHz stable Grin

Adding slub to the end of cmdline.txt has my pi back up and running like it's old self again. It's been hashing away without any problems for the last hour or so. I started playing around with the clock settings and 360mhz was the highest value that my K16's would actually hash at. What is weird is that at 360mhz they only hash at about half speed. I get around 2.5 to 2.8 gigahashes at 360mhz. The highest I can go on mine and still have full speed is 352mhz. If I change it to 353mhz the hash rate drops dramatically.

Chad

Since the board uses two groups of 8 chips, and each group has it's own regulator, it is possible that regulator on one side (for one group) cant keep up with the other one - so one side is without power when clocked that high and another one is hashing. That would explain why you get half of the hashrate at higher clocks.

Possible to latch the output of the two regulators together in this case as a work around?

For those who have hot air gun and a fat wire to do it with :-P

I would definitely not advise this, since both regulators can have a slightly different output voltages. And if one is dropping off, the other one would be near its limit too, because they are identical. Anyways, you probably wouldn't get past 375, which is a 400MH/s gain per board. I think that tinkering with it for this low speed gain and with current difficulty is not worth it, especially if it is working stable and without any major problems now.

Good point. How about adding an external 12Amp 1.2v 600Khz switching DC-DC regulator? I see them available on the net for around 8 bucks a pop.