I'm working on some pages, the Dell page will probably go as the Dell web links keep changing on me, making the page a bit useless.
But in the left frame is a link called 'instructions' just follow this on how to (un)install.
ALL the drivers you see are nVidia based, so they will all work with your GPU.
Have a good look around before trying just incase you need to get back to your orignal driver.
If you get the driver from Guru3D you still need to install it the same way, as Hilbert uses my INF anyway.
It is best to install by uninstalling first then using update driver method, setup.exe doesn't always work as it should.