Crossfire does lagg.?

Well, crossfire was lagging badly yesterday still today a bit...
since the new patch i guess.

and something is wrong with my fps though...

they drop since the new patch from 140 to 50-70 weird.
Can't be my system i got 100 fps in other games like (San Andreas)

nVidia GEforce 9800 GT (1024MB)
DDR2 3072 (3GB)
AMD Athlon 6000+ 3,1 ghz

I also clean my pc. example my friend got another intel pentium pc isn't that good like mine..
he still got 100fps+ ...but he doesn't have even 100 fps in san andreas only 80 i think.

any Ideas?