I'm curious if anyone knows why GTX 1070 performance has dropped on Eth.  I still have a bunch of them on various Windows and Linux rigs.  They all easily hit over 30 MH/s in the past and many were in the 32-33 MH/s range.  Now, they are lucky to to hit 30 and many are 28-29.  This is the case with both Claymore (with and without strap settings) and Phoenix.   Oddly, my 8GB RX 580s still chug along happily at 30-31 MH/s (i.e. they don't seem to have been affected by whatever is responsible for slowing down my 1070s).