Here is the Minimum System requirements for the latest Assassin's Creed Syndicate game. The game released already for the PlayStation and Xbox One and it will be released on November 19, 2015 for the Windows Computers. You can watch cinematic trailer of the game and also read about the pre-order offers here
The Minimum requirements for the game
Supported OS : Windows 7 SP1, Windows 8.1, Windows 10(64bit versions)
Processor : Intel Core i5 2400s @ 2.5 GHz or AMD FX 6350 @ 3.9 GHz
RAM : 6GB
Video Card : NVIDIA GeForce GTX 660 or AMD Radeon R9 270 (2GB VRAM with Shader Model 5.0)
DirectX : DirectX June 2010 Redistributable
Sound : DirectX compatible sound card with latest drivers
And the recommended PC configurations is
Supported OS : Windows 7 SP1, Windows 8.1, Windows 10(64bit versions only)
Processor: Intel Core i7-3770 @ 3.5 GHz or AMD FX-8350 @ 4.0 GHz
RAM : 8GB
Video Card : NVIDIA GeForce GTX 760 (4GB) or GTX 970 (4GB)* or AMD Radeon R9 280X (3GB) or better
DirectX: DirectX June 2010 Redistributable
Sound : DirectX 9.0c compatible sound card with latest drivers
Hard Drive: 50 GB available space
Here are some other points you may need to have a look
The game requires a video card with at least 3GB of VRAM when playing at a full HD resolution.