Hi Guys,
I'm not sure if this works for everyone and if this is posted before but i found a way to get around 30 to 40 khas more for each gpu i have.
I have an ASRock extreme 4 motherboard and with the ASRock tool AXTU i changed the PCIE frequency from the motherboard to 95 MHz. And this gave 35 khash/s more!!!
Pic with the normal 100MHz:
http://michielvanaalst.nl/tnet/100.pngPic with the 95 MHz:
http://michielvanaalst.nl/tnet/95.png