The Eidos Montreal blog offers system requirements for the THIEF reboot that's due for release next week (thanks DSOGaming). Though the post says "THIEF will also be one of the first games to ship that takes advantage of AMD’s Mantle graphics API," the paragraph that follows contradicts this, saying support for AMD's Mantle and TrueAudio technologies will come via a patch next month sometime, though "AMD CrossFire™ technology and AMD Eyefinity multi-display technology will be fully functional when THIEF launches on the 25th February in North America and 28th February in Europe and other associated territories." Here are the system requirements, which include a lengthy appendix of specific PC features the stealth/action game will support:

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 Quad i7 Core CPU
RAM: 4+ GB
Graphics Card: AMD Radeon R9 series or better / Nvidia GTX 660 series or better
DirectX: DirectX 11
HDD/SSD: 20 GB

Other PC Features

Input & UI
Full mouse & keyboard integration for the user interface with customized context bar, all buttons are clickable and can be controlled with keyboard.
Custom designed weapons bar when playing with mouse & keyboard
Extensive Customization for Graphics & Display including the following options:

Display

• Toggle fullscreen
• Vsync
• Resolution adjustment
• Refresh rate
• For 3D: Stereo separation
• For 3D: Stereo depth

Graphics

• Fov sliders
• Texture quality & Texture filtering quality
• Shadow quality
• Screenspace reflection
• Depth of field quality
• Parallax occlusion mapping aka POM
• SSAA
• FXAA
• Contact Hardening Shadows

Change text language in-game via the Audio menu
4K resolution support
Benchmark mode
Mouse & Keyboard mapping
Xbox 360 controller support
Custom Save/Load system including auto save and manual saves, similar to what we did for Deus Ex: Human Revolution

Nvidia
Surround multi monitor support
3D vision support
3D vision + Surround multi monitor support
SLi support

STEAM
Steam community & leaderboard integration
Steam achievements
Steam trading cards