I run Battlefield 3 at medium-low settings and maintain 50-60FPS most of the time. However, on maps like Seine Crossing I average ~35FPS, dipping to 20-25FPS during intense firefights even with all settings low. I'm looking for more consistent results but have a limited budget.
Windows 7 64 Ultra
AMD Phenom II X4 955
ATI Radeon HD-4850 1GB GDDR3 (Overclocked)
I'm guessing the GPU is the limiting factor. Is there a budget card at around $100 (rebates, etc.) that would provide significant improvement (I'm fine with lower graphics setting as long as I net a consistent 50-60 FPS)? Would I be better off finding another 4850 for dual Xfire? Would a more considerable GPU upgrade get bottle-necked by my CPU? Thanks in advance for any advice/info.