I had display issues with an extremely old integrated graphical chipset on Windows 8.1 Preview, so I decided to purchase the Nvidia GTX 660, imagining that it would have a slightly better support.
It appeared that it's actually worse, since the new GPU is... well, not working at all (unless displaying a black screen can be qualified as working). This is the default behavior (i.e. before installing any driver), and remains the same both when installing the non-beta drivers through Windows Update (version 320) and when installing manually the latest driver for Windows 8.1 Preview for this GPU (version 326.19).
I don't care about advanced support for games, 3D, etc. I also don't care about performance. I just want the GPU to display at least something. Is there a way to make it work in a sort of fail-safe mode or some sort of generic mode (maybe some Windows generic drivers?), where performance of a particular GPU is lost, but it is still possible to use the GPU?