GTA IV Gameplay On My HD 4650

My PC Specs :- Processor-AMD Sempron 145 OC'ed to 4 Ghz Ram- 2 GB ddr3 800 MHz GPU- ATI Radeon HD 4650 1 GB DDR2 HDD-500GB W\O Fraps- avg. frames - 17- 30 With fraps avg. frames - 14-15 Game Settings - Texture ~Medium .. And everything else on very high Resolution - 1024 X 768