really? My S2 batch 2 S2 may as well have come flat packed with all the cards fallen over with bent pci slots as it was. I have since fixed all this, plus replaced all the fans (one fan was broken and couldn't get a matching one), all fans are now running a nice constant speed and are powered by a bitspower x-station fan control unit running off the factory power supply, i would have replaced the factory supply with something a bit bigger but one of the pins on my mainboard was badly damaged and the only pci-e 6 pin cable i can get to fit is the enermax one that came out of it. So i'm stuck with the underpowered power supply, which for the first few days kept turning itself off, the orientation of the psu is all wrong, the intake just sucks in warm air from the asic boards causing the psu to overheat, so have rotated the psu and cut a nice hold in the side of the case and added a fan grill and dust filter and it has not had power problems since. I had a problem with the sdcard corrupting itself and had to steal the sdcard out of my partners phone to fix it at 2am still haven't replaced her music (sorry bub) now i keep a copy of the sdcard should it have problems again. thinking of making a hatch in the top of the unit so i can pop the sdcard out if i ever need to power down the unit as this would avoid corruption it seems and also wouldn't have to take the case off, maybe a hinged steel lid. The device reports an average hash rate of 1008GH/s but the pool speed actually reports between 800-900 overall not really impressed. I could have had a coincraft unit for less and had less problems. My next unit is a Spondoolies SP30 Sorry Bitmain i had such high hopes for the S2, but 10+ days late and broken has left me less than impressed