I need to upgrade my video card for my gateway desktop?

i want to upgrade my desktop so i can play the sims 3 (sims addict) i have a gateway e4100 and the driver and card is Intel(R) 82865G Graphics Controller the card doesn't support pixel 2.0 and i like to upgrade to a better where it can where can i buy a new card .......and which card do you reccommand|||if you have an E4100 processor in your machine you most likely have lga 775 chipset, which translates into a pci express video card interface. any good card today is pci express so i recommend if your on a budget an HD 4770 from ati, its the same performance as a 9800gtx but its more power efficient. if you bought your pc directly from gateway then it turns out you might have a bad power supply only a 350 or 400 watt. i'd recommend you buy at least a 500 watt power supply of a good quality brand like coolmax or pc power and cooling when you buy this video card.