hello guys, i need some help... i have got gm45mhd graphics adapter and intel r 4 series integrated graphics... i have a total graphics memory of 1582 mb... but still games run very slow, i even have 3.46 gb ram usable and total of 5 gb installed ram.... please tell me is there any way to use maximum graphics memory manually or can i install another graphics card..... its on dell vostro 1014 .... or tell me if there is any way to use external grahics card through expressSlot..... plz help me out, i cant afford to buy a new lappy..... plz help me out..... plz....