Check out the minimum and recommended system requirements for PES 2013.
MINIMUM SYSTEM REQUIREMENTS
Windows XP SP3, Vista SP2, 7
Intel Pentium IV processor 2.4 GHz or equivalent processor
1GB of RAM
Video Card NVIDIA GeForce 6600 or ATI Radeon x1300. Pixel / Vertex Shader 3.0 and 128MB of VRAM DirectX 9.0c compatible graphics card.
RECOMMENDED SYSTEM REQUIREMENTS
Windows XP SP3, Vista SP2, 7
Intel Core2 Duo 2.0 GHz or equivalent processor
2GB of RAM
NVidia GeForce 7900, ATI Radeon HD2600 or higher. Pixel / Vertex Shader 3.0 and 512MB of VRAM DirectX 9.0c compatible graphics card.