I don't think the 8150 should be bottlenecking a 660Ti in BF3. BF3 scales well on multi-threaded CPUS, so theoretically Bulldozer should do okay. My question is, why do you think there is a bottleneck? What kind of settings are you running in BF3? What kind of frame rates are you getting?
With all settings on Ultra, and all the anti-aliasing tools turned ON, I think you should be getting about 55-60FPS out of your GTX660Ti, at 1080P. If you're getting significantly less than that, say 40fps average, then yeah, your CPU is bottlenecking. If you're getting close to those framerates (say, 50fps) then I think you're fine.
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