From Dust System Requirements

OS: Windows XP SP3 / Vista SP2 / Windows 7 SP1
Processor: Intel Core 2 Duo 1.8Ghz / AMD Athlon64 X2 4400+ 2.3 Ghz
Memory: 1 GB (XP) / 2GB (Vista/Windows7)
Graphics: 256 mb / shader 3.0 GeForce 8800 GT or ATI Radeon HD 3000+
DirectX®: 9.0c
Hard Drive: 4 GB
Sound: DirectX 9.0 –compliant sound card
Peripherals: Keyboard, mouse, optional controller * This product does not support Windows® 98/ME/2000/NT

OS: Windows XP SP3 / Vista SP2 / Windows 7 SP1
Processor: Intel Core i7 920 2.66 Ghz or AMD Phenom II X4 3.00 Ghz
Memory: 3 GB DDR3
Graphics: 512 MB / GeForce 9 or ATI Radeon HD 4000 series
DirectX®: 9.0c
Hard Drive: 4 GB
Sound: DirectX 9.0 –compliant sound card
Peripherals: Keyboard, Mouse, joystick optional (Xbox 360® Controller for Windows recommended) * This product does not support Windows® 98/ME/2000/NT