драйвера для windows 8.1 nvidia(x64)

Just in time for the preview of Ashes of the Singularity, this new GeForce Game Ready driver ensures you'll have the best possible gaming experience. This driver also supports the Beta version of the GameWorks VR software development kit (SDK). As a result, users will be able to enjoy the benefits of GameWorks VR with supporting applications and headsets for the first time.

Game Ready 
Best gaming experience for Ashes of the Singularity preview

GameWorks VR Support
Supports Beta release of GameWorks VR SDK, including support for VR SLI, Context Priority, Direct Mode, and Front Buffer Rendering. Learn more at developer.nvidia.com/vr.