Minimum Specs (Required for playing Total War: Shogun 2):
* 2 GHz Intel Dual Core processor / 2.6 GHz Intel Single Core processor , or AMD equivalent (with SSE2)
* 1GB RAM (XP), 2GB RAM (Vista / Windows7)
* 256 MB DirectX 9.0c compatible graphics card (shader model 3)
* 1024×768 minimum screen resolution
* 20GB free hard disk space
Recommended Specs (Recommended for optimum game play of Total War: Shogun 2):
* 2nd Generation Intel® Core™i5 processor (or greater), or AMD equivalent
* 2GB RAM (XP), 4GB RAM (Vista / Windows7)
* AMD Radeon HD 5000 and 6000 series graphics cards or equivalent DirectX 11 compatible graphics card
* 1280×1024 minimum screen resolution
* 20GB free hard disk space
My guess on having a lag free game:
* 4GHZ+ 10-Cores CPU
* 8GB of RAM
* Dual Directx12 compatible Graphics cards
* 640×480 maximum screen resolution
* 60GB free hard disk space for uncompressed sounds. Another 40GB for badly compressed AI and game files