hey, i recently downloaded gta 4 on my pc and i installed it to the latest patch (1.0.7), and the game doesnt run smoothly. can someone tell me what i need to buy or upgrade on my pc so it can run smoothly or atleast run from 50-30 fps, my budget below 1000$ because my country money cheaper than US and EU. my pc spec are 3gb ram, geforce gt 520 1gb gpu, e5700 dual core processor, 500gb hdd