My folding production was down 25K to about 50K PPD since I installed my Sabertooth and rejiggered my overclock. My 680 was only getting 30K PPD, and my 1055 was only getting 7-8K PPD (that's what it gets at stock clocks, not 4.0GHZ). Turns out my overclock wasn't completely stable, so I added .01 the CPU voltage, and Presto! PPD is back up where it should be, about 75K PPD.
Oddly enough, the 570 didn't actually reduce it's production like the 680 did.