Don't think u could get 45 fps with max quality for doom3 or quake4, but maybe for nfs:mw(not sure). To get those kind of frame rate (smooth gameplay) buy a 6600gt or higher cards. With 6600 high quality setting is possible but not max.
Better if u have decided then buy it and play around with settings during actual gameplay.
But I would suggest u buy a 6600gt 128mb ddr3, would make u future proof and u could play games at ur desired setting.
But anyways 6600 is a very good choice for value for money. Happy gaming.
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Faith is the boast of a man who is too lazy to investigate.
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