In order for you to play Serious Sam 3: BFE on Windows with minimal graphics settings, your computer must meet the following requirements
OS *:
Windows XP 32-bit (with service pack 2 or 3)
Processor (CPU):
Dual-core from Intel or AMD at 2.0 GHz
Memory (RAM):
1GB
Graphics Card:
nVidia GeForce 7800/7900/8600 series, ATI/AMD Radeon HD2600/3600 or 1800/X1900 series
DirectX®:
9.0c
Hard Drive:
4GB free hard drive space
Sound:
DirectX9.0c Compatible Sound Card
In order to play Serious Sam 3: BFE on Windows with maximum graphics settings, you need a computer with a configuration no worse than the following
OS *:
Windows 7 64-bit
Processor (CPU):
Quad-core from Intel (i5/i7-series) or AMD (Phenom II) at 3.0 GHz
Memory (RAM):
4GB
Graphics Card:
nVidia GeForce 480/580 GTX, ATI/AMD Radeon HD 5870/6970
DirectX®:
9.0c
Hard Drive:
4GB free hard drive space
Sound:
DirectX9.0c Compatible Sound Card