APB, otherwise known as All Points Bulletin, has some reasonable minimum system requirements but suggests some pretty stiff recommended cpu requirements.
APB Minimum system requirements
REQUIRED: Internet Connection of 256kbits/sec
PC OS: Windows XP, Windows Vista, Windows 7
CPU: 2.13GHz Core Duo 2, Dual Core
RAM: 2GB RAM
HARD DRIVE: 15 GB
DVD-ROM: 8x Speed
VIDEO CARD: 7800 with 256Mb and support for Pixel Shader 3.0, or ATI equivalent
SOUND CARD: DirectX compatible
INPUT: Keyboard, Mouse, Headset with microphone required for Voice chat
APB Recommended System Requirements
CPU: 2.4GHz Core Duo 2, quad-core,
RAM: 4GB RAM
VIDEO CARD: GeForce 8800GT with 512MB or ATI equivalent.
Broadband Connection recommended.
APB Laptop Requirements - chipsets may work but are not supported. Updates to your video and sound card drivers may be required.