Radeon 4650 30 FPS, HELP OMG

I only get 30FPS on my radeon 4650, I used to get 130+, i reinstalled crossfire, defragmened, no virsus, nothing, i did it all and i still get 30 fps in a 8v8, it runs fine when there is 2-3 people but when it hits more i lag..

HELP?

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