Bulletstorm requires the following minimum configuration:

Operating System: Windows XP (SP3), Windows Vista (SP2), or Windows 7
Processor: Intel Core 2 Duo, AMD Athlon X2, or equivalent, running at 1.6 GHz or greater
Memory (RAM): 1.5 GB
HDD Space: 9 GB available
Video Card: DirectX 9.0c compatible, 256 MB of VRAM; NVIDIA GeForce 7600 GS, ATI Radeon HD 2400 Pro 256 MB, or greater
Soundcard: DirectX 9.0c compatible, 16-bit
Disc Drive: 16X CD/DVD Drive
Network: Internet (TCP/IP) connection

The following configuration is recommended to run Bulletstorm:

Operating System: Windows Vista (SP2), or Windows 7
Processor: QuadCore 2.0 GHz
Memory (RAM): 2 GB
HDD Space: 9 GB available
Video Card: DirectX 9.0c compatible, 512MB of VRAM; NVIDIA GeForce GTX260, or ATI Radeon 4870
Soundcard: DirectX 9.0c compatible, 16-bit
Disc Drive: 16X CD/DVD Drive
Network: Broadband Internet (TCP/IP) connection