Electronic Arts has released the minimum specifications for The Sims 3, if you are running Vista, you’ll need a slightly more beefier computer.
Minimum Spec Details for The Sims 3
Desktop
– XP w/ service pack 2, Pentium IV 2.0 GHz / Athlon XP 2000+, 1 GB of RAM, GeForce FX 5900 / Radeon 9500 128 MB
– Vista w/ service pack 1, Pentium IV 2.4 GHz / Athlon XP 2400+, 1.5 GB of RAM, GeForce FX 5900 / Radeon 9500 128 MB
Laptop
– XP w/ service pack 2, Pentium IV 2.0 GHz / Athlon XP 2000+, 1.5 GB of RAM, GeForce Go 6200 / Radeon mobile 9600 128 MB
– Vista w/ service pack 1, Pentium IV 2.4 GHz / Athlon XP 2400+, 2.0 GB of RAM, GeForce Go 6200 / Radeon mobile 9600 128 MB