tnx ^_^
btw i solved with this problem but now i have another... 6 gpu (280x) -> only 5 detected on windows
try win 8.1 with 13.11 beta driver
when i'll be back to home i'll try with this driver.. now i'm with BAMT but i really don't like it... (6 gpu detected at 750kh) ... if this driver don't change anything i'll try with SMOS ... (for what i find in my searches is an upgraded version of BAMT)
PS today amazon delivered me the last piece of my rig (3x cooler master megaflow 200) ^_^ soon i'll post a picture ^_^
PPS for the riser problem i solved with usb riser ^_^