its not your power supply or pool ....ITS THE FIRMWARE !!!!!!!
there is a power setting that's messed up in it.
the power settings in the miner did not save properly at the factory so after 20 min to a few hrs it drops to nothing or lo.
look in your advanced settings under your clock speed is the voltage it is probably empty or shows .0770 this is wrong
i explained all this on this sight but no one would listen.
the firmware is screwed up and if you don't uncheck the save settings box above your flashing file on your first flash back it will crash during flash and will be unbootable!!!!!!
if you don't uncheck save settings box before the next two flashes it wont save the power properly.
try it on your worst one and fallow my instructions exactly and it will run perfectly ! then you can do it to the rest
so download the first 3 bitmain s3+ firmware from there sight
antMiner_S320140826.bin
antMiner_S320141013.bin
antMiner_S320141219.bin
then reboot your miner!!! just so its a fresh start up
when its back up go to update firmware uncheck the save settings box and flash antMiner_S320140826.bin
at this time you will be at ip .99
when its done and back up go back to flash firmware and uncheck the save settings box and flash antMiner_S320141013.bin
when its done and back up go back to flash firmware and uncheck the save settings box and flash antMiner_S320141219.bin
when its back up go to miner settings erase all of there mining and replace with yours then push save and apply
then go to advanced settings click on 225 then push save and apply
then go to your networks and change your ip to what you want from .99 to .
(your miner ip)
now type your new ip in search bar and your up and gowning!!!!!!!!!!!!!
i explained this to many people the other day and no one believed me thy thought i was lying. but now you are down.
i have 26 s3's and my s3' were crashing many times a day thy were working good and then crash down to 40 gh/s i have been working on this problem for a month and finely fixed them.
if you had flashed bitmains last firmware 1226 or you have batch 11 that's the problem and reset wont work and if you flash back to earlier program it crashes the miner and is un bootable.
i am willing to enplane step by step how to recover the unbootable miner and flash crashing miners back to good firmware with success. bitmain is making tones of btc telling people the control boards are bad just like thy told me and i fixed it. it took me three hrs to set up and figure it out and now that im setup it only takes 15 minuts to fix a crashed s3's.
if you want the help i can give it and in return it would be nice to get a btc donation for saving you tons of time and money 15s7keW5PNYESG63p2ZWc5GcEkDebx4Awp