Will this computer be good for what i need?

It most likely will not play the sims 3 do the fact the graphics card is integrated. You would need to find a computer with a dedicated graphics card or look into buying one for it. The processing speed and ram is about average for the game . When you look for a computer you want to look for A graphics card with ATLEAST 256-512 mb of ram. If you are running windows xp shoot for 2-4gigs of ram. and a Duo core OR quad core processor around the 2-2.5 range will be fine. The hard drive space if 320gs will be plenty for you.