Choosing a new Graphics card
I cannot really advise on a particular card to get, as it will depend upon your computer and also upon your finances and preferences!
This is a list of cards supported by The Sims 2 Open for Business, which gives you a good starting point:
EA Website
To buy a new card, first you need to find out which kind of slots you have on your mainboard to fit the card into. To find out this information you’ll need to do one of three things:
1: Take your computer cover off to see,
2: Use a program such as System Specs or Everest Free to find out,
3: Ask a professional, or someone who knows about computers to help you.
Once you know what types of card you can buy, I’d recommend that you do some research. An easy way to find out what may work well is to ask on the Computer and Tech Gizmo forum and to read the Help Forum so that you can see which cards people are having difficulty with. Murronrose's guide here is a great source of information, you can also post a question there. It is also a good idea to read reviews and compare prices, you can do this by googling any graphics cards you are interested in, or reading computer websites and magazines to find comparisons and recommendations. If you have a local computer store you could ask there, too- and advice from people you know who own computers is always useful. Ultimately, if you don’t know which card will work for you or you don’t know how to install a card, get the advice of a computer professional. As long as you have a clear idea of what you want your PC to do and how much you want to spend, you’ll be okay.