Hi all,
I am a proud and happy user of an M17xR3 .
A few years back,  the graphics card passed/died. I carried on using the laptop with the onboard graphics card.
Beginning of the year, I upgraded everything that could be upgraded apart from the graphics and installed Win10.
Here comes the question: What's the best graphics card that is officially supported and can run on Windows 10?
I bought a 780M but seems that BIOS was not compatible or so I was told.
Any suggestions, ideally with real-life examples?

Many thanks in advance!