Have anyone tried to underclock this miners? I wonder how low can we get the J/GH number and at what cost in hashrate terms.
Probably 1J/GH, if you're willing to accept half the hashrate. I plan to change the voltage on one of mine and see the effect. I'll probably first go to 1.05V and see if I can keep it stable at 400MHz, and then go down from there.
gonna post a guide on this mod? isnt it switching out like one resistor on each "module"(4 per blade) to change the voltage?
I suppose I could. If I'm really ambitious I might make a shmoo plot, but I'm not sure I'll get that far.
I'm gone for a couple weeks though, so it won't be any time soon.
You want to change R3, R66, R38 and R52. The default is 8.2kOhm. The exact formula as per the datasheet is a little hairy as it depends on a lot of terms, but you can probably just simplify it to R = 16266*Vout - 9.76kOhm