Can you save the benchmark score, and post?
you might wanna play on lower res etc.
Also you can look at catalyst settings (if you got that) it might be that you are overriding some game settings, or using high settings, that slow down the game.
try turning off anti aliasing etc. it doesn't do much for edges that i noticed, but lowers scores a bit. check lod boxes, turn of glare, occlusion.