Here are the specs for PC:
PC MINIMUM SYSTEM REQUIREMENTS:
Operating System: Windows XP SP2, Windows Vista
CPU Processor: Intel Pentium D (Dual Core) 2.8GHZ or AMD Athlon 64 3500+
Memory: XP - 1 GB RAM, Vista – 2GB RAM
Hard Disk Space: 5.1 GB + 1GB Swap File
Sound Card: DirectX 9.0c compatible sound card
Video Card: 3D Hardware Accelerator Card Required – 100% DirectX 9.0c compatible 128 MB Video Memory
Video Card (ATI): Radeon X800
Video Card (Nvidia): Geforce 7600
Media Required: 4X DVD-ROM drive
Windows XP/Vista compatible mouse and keyboard with latest drivers
Guitar Hero 3 Official PC Guitar Controller
This product does not support Windows 98/ME/2000/NT/XP x64/Vista x64.
MULTIPLAYER REQUIREMENTS:
Internet(TCP/IP) play supported
Internet play requires a broadband connection
RECOMMENDED SYSTEM REQUIREMENTS:
Intel Core 2 Duo 2.4GHZ or AMD Athlon Dual Core 4400+
256 MB 3D Hardware Accelerator Card
Video Card (ATI): Radeon HD 2600
Video Card (Nvidia): Geforce 8800 GT
2 GB RAM
Notice: Some Mobile and Desktop 3D accelerator cards with the chipset listed here may not be compatible with the 3D acceleration features utilized by Guitar Hero 3. Please refer to your hardware manufacturer for 100% DirectX compatibility.
Notice: This game contains technology intended to prevent copying that may conflict with some disk and virtual disk drives.
SUPPORTED DESKTOP CHIPSETS:
ATI RADEON X800
ATI RADEON X1600
ATI RADEON X1800
ATI RADEON X1900
ATI RADEON X1950
ATI RADEON HD 2400
ATI RADEON HD 2600
NVIDIA GEFORCE 7600
NVIDIA GEFORCE 7800
NVIDIA GEFORCE 7900
NVIDIA GEFORCE 8400
NVIDIA GEFORCE 8500
NVIDIA GEFORCE 8800
Notice: The Nvidia Geforce 8400 and 8500 cards have known issues on Vista machines with AMD CPUs.
SUPPORTED MOBILE CHIPSETS:
NVIDIA GEFORCE GO 7600 (XP Only)
NVIDIA GEFORCE GO 7800
NVIDIA GEFORCE GO 7900
NVIDIA GEFORCE GO 8400
NVIDIA GEFORCE GO 8700
