Hijaz

I play in the lowest settings possibele..... PLEASE HELP

Hey guyz Please help me with me GTA eflc.. My riggs Intel core 2 quad q8400 2.66 3GB ram HD 4850 512 mb VGA And calalyst 10.8 But EFLC runs very slow in my pc.I have already patched it to 1.1.2.0.. I saw in many sites that the game did not support ati cards well.. GTA iv worked well for me even when i had a core 2 duo PLEASE HELP ME WITH THIS