Okay - I'm upgrading an *existing* PC to i5-3570K, and I'm looking for the best-bang/least bucks single-GPU upgrade to match.
CPU - Intel Core i5-3570K @ 4 GHz
Motherboard - BIOSTAR TZ77XE4
RAM - 16GB
HDD - WD Caviar Green 1 TB HDD
All replies suggesting nVidia or multi-GPU setups will be ignored (multi-GPU - including CF/SLI - is NOT a consideration; because this is an existing rig, with an AMD GPU, nVIdia is also not an option).
Primary games - Crysis 2, Need for Speed Hot Pursuit 2010, Need for Speed - The Run
Target Resolution - 1920x1080
Target Detail - High (Ultra Preferred)
Target fps - minimum of 30 fps







