Do you get display?
You should, because windows comes with universal display drivers, otherwise something went wrong. Either way, go to Nvidia's website, find the drivers for your card, and do a clean install of them.
If you don't get a display, don't worry, if you motherboard has integrated graphics (or can use them though a CPU that does) uninstall the GPU from your system and use the integrated graphics to find, download, and do a clean install of Nvidia's drivers.