the issue is gone now.

for other reasons i bought a new graphic card gtx590, uppgrade from hd4870x2 now i have zero issues, i run 6 instances 2560x1300 60fps.

ofc the gtx590 is top of the line but the hd4870x2 was and still is very powerfull.

BUT, i went from ATI to Nvidia (i wanted the ATI but cba to wait ) so perhaps it was an issue with eve ati and isboxer.

ohh well all is good now