30 May '14, 10am

S1 under clocking to 1W/GH/s --Guideline-- https://t.co/7z6IcPX6mI

I reduced the resistances to between 2920 and 2950 and the chip voltage range is now between 855mV and 870mV, so pretty consistent although I only measured the top four on each board. Having set the frequency to 275MHz I am getting around 0.25% errors (although this appears to be slowly creeping up) and my meter is showing 180W (240V). With the sudden increase in the price of Bitcoin I calculate I am losing around 5% of my income after allowing for the cost of the electric which is pretty good and that will decrease should the price go down again (or when the difficulty goes up next). The plus side is a reduction of around 10C in chip temperature and it is a lot quieter. Now to decide which other ones to do as that S2 would only really run at 375MHz anyway, although at that speed there were little to no errors, any quicker and they really racked up! I have another one that...

Full article: https://bitcointalk.org/index.php?topic=526060.msg7031946...

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