Back to Windows 8 days of consumption preview, he had released the beta version of NVIDIA GeForce drivers. As time goes on Windows 8 came to the final version and the latest public beta of Windows 8 is already underway and is available for download. While making the announcement of their Nvidia GeForce WHQL-certified drivers are ready to preview the Windows version 8, which took over a week to release WHQL drivers.
You can download 32-bit as well as 64-bit GeForce drivers for Windows 8 Release Preview using below links.
The drivers are exclusively for Windows 8 and shouldn’t be installed in older version of Windows. You can find more details about these drivers here.