Here are the system requirements for Thief.
Minimum System Requirements
- OS: Windows Vista with platform update
- CPU: High-performance dual core CPU or quad core CPU
- RAM: 4 GB
- Graphics Card: AMD Radeon 4800 series / Nvidia GTS 250
- DirectX: DirectX 10
- HDD/SSD: 20 GB
Recommended Specs
- OS: Windows 7 or 8
- CPU: AMD FX 8000 series or better / Intel i7 Quad Core CPU
- RAM: 4+ GB
- Graphics Card: AMD Radeon HD / R9 series or better / Nvidia GTX 660 series or better
- DirectX: DirectX 11
- HDD/SSD: 20 GB