Low FPS in BGs and Raids

Hello everyone, in last few months i was playing casualy, doing dailys etc.
Now im starting with 25 man raids and bgs, and its absolutely impposible to play :( i literely have 6 fps or less.
Im playing on laptop with solid spec, more then good to run wotlk on highest settings.
Spec is 12gb of ram, dual graphics one is HD7670m AMD Radeon 2gb, and CPU is AMD A8 quad 2.8GHZ.
Im sure that my drivers are up to date, and also im playing on win8.1 x64!

Thank you very much, i would like to solve this problem asap! And if you can help me that would be great!
-Dan