The Bethesda Blog now offers system requirements for the Windows PC edition of Dishonored, Arkane's upcoming stealth/action sequel:

Below you’ll find both the recommended and minimum system requirements for the game.

Minimum Spec:

OS: Windows Vista / Windows 7
Processor: 3.0 GHz dual core or better
Memory: 4 GB system RAM
Hard Disk Space: 9 GB
Video Card: DirectX 9 compatible with 512 MB video RAM or better (NVIDIA GeForce GTX 460 / ATI Radeon HD 5850)
Sound: Windows compatible sound card

Enhanced for:
64-bit
multi-core

Recommended Spec:

OS: Windows Vista / Windows 7
Processor: 2.4 GHz quad core or better
Memory: 4 GB system RAM
Hard Disk Space: 9 GB
Video Card: DirectX 9 compatible with 768 MB video RAM or better (NVIDIA GeForce GTX 460 / ATI Radeon HD 5850)
Sound: Windows compatible sound card

Want to learn more about the PC release of Dishonored? Be sure to read our UI feature that includes discussion of unique PC options in the game.