4A-Games released Metro 2033 System Requirements:

Minimum System Requirements

Dual-core processor (Core 2 Duo series of requirements or higher)
The DX9 support SM3.0 graphics, GeForce 8800/GT220 or higher
1GB memory

Recommended

Quad-core processor; or 3.0GHz dual-core processor
DX10 graphics cards, GeForce GTX 260 or higher
2GB memory

Preferred configuration

Core i7 Processor
NVIDIA DX11 graphics cards, GeForce GTX 480/470 (sic)
8GB memory (as possible)
High-speed hard drives (SSD better)

NVIDIA 3D Vision

NVIDIA GeForce GTX 275 or higher
120Hz display
NVIDIA 3D Vision Kit
Windows Vista or Windows 7

Preferred configuration inside the GeForce GTX 480/470, PAX East 2010 until March 26 before the opening.