Here are the Trans-Siberian Railway Simulator: Prologue System Requirements (Minimum)
CPU: Intel CPU Core i5-2500K 3.3GHz / AMD CPU Phenom II X4 940
RAM: 8 GB
VIDEO CARD: Nvidia GPU GeForce GTX 660 / AMD GPU Radeon HD 7870
DEDICATED VIDEO RAM: 2048 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: 64-bit Windows 7, 64-bit Windows 8 (8.1) or 64-bit Windows 10
FREE DISK SPACE: 18 GB
SOUND CARD: DirectX compatible
Trans-Siberian Railway Simulator: Prologue Recommended Requirements
CPU: Intel CPU Core i7 3770 3.4 GHz / AMD CPU AMD FX-8350 4 GHz
RAM: 16 GB
VIDEO CARD: Nvidia GPU GeForce GTX 770 / AMD GPU Radeon R9 290
DEDICATED VIDEO RAM: 2048 MB
PIXEL SHADER: 5.0
VERTEX SHADER: 5.0
OS: 64-bit Windows 7, 64-bit Windows 8 (8.1) or 64-bit Windows 10
FREE DISK SPACE: 18 GB
SOUND CARD: DirectX compatible