Minimum System Requirements for Windows 8 32-bit (x86) or 64-bit (x64) OS from Microsoft

Here is the official Windows 8 system requirements from Microsoft



1 GHz or faster  processor
1 GB RAM for x86 and 2 GB RAM for x64
16 GB free hard disk space for x86 or 20 GB free hard disk space for x64
DirectX 9 graphics device with WDDM 1.0 or higher driver