The system requirements for The Sims 2 are as follows:
800 MHz processor
256 MB RAM
Windows® XP, Windows ME, Windows 98 or Windows 2000 Operating System.
At least 3.5 GB of hard drive space
A T&L-capable video card with at least 32 MB of video RAM.
Supported video cards:
ATI Radeon series (7000 or better)
VE series (see note below)
7000, 7200, 7500
8500, All-In-Wonder 8500
9000, 9200, 9500, 9600, 9700, 9800
X300, X600, X800
NVIDIA® Quadro series
Quadro, Quadro2, Quadro4
NVIDIA GeForce series (GeForce2 and better)
GeForce 2
GeForce 3, 3 Ti
GeForce 4, 4 Ti, MX 420, 440
GeForce FX 5200, 5600, 5700, 5800, 5900, 5950
GeForce 6600, 6800
Intel® Extreme Graphics (see note below)
82845, 82865, 82915
NOTE: If you have a non-T&L capable video card, such as Intel Extreme Graphics or Radeon VE series, then you need at least a 2.0 GHz processor.
If you have an integrated video card, i suggest you get either an AGP video card at least 64MB or a PCI Express Video Card (for best performance). However, when you get the video card make sure to ask if the video card you're buying is thunder and lightning compatible