hi i have a amd athlon ii x4 640 and 8gb ddr3 kingston ram motherboard is gigbayte and my graphic card is a asus r7 250 1gb i try to play grand theft auto san andreas and its laggy everything loads but its slow everything in game all my drivers are uptdate i play games like crysis 2 and cod 4 they run fine any ideas what could be lagging me in the gta sanandreas game?.