Pixel Shader

I have bought the Sims 3. I then found out my destop is totally unsuitable to play the game. I am in the process of purchasing a new desktop. I think  the has everything for the game. However I am totally new to the lingo used in the System Requirements. Does this desktop have 128MB video card with support for Pixel Shader 2.0? I am literally repeating what's on the box so I don't have a clue what it means really. Please reply all help is appreciated