First of all, I'd like to thank the community of this forum for helping when we're lost. As I sure am right now.
Secondly, please, please, please be indulgent with my english. (I will try to do my best to be clear)
I'm working with a Mac Pro 5.1 mid 2012 (3,2 GHz Quad-Core Intel Xeon, ATI Radeon HD 5770 1 Go,
32 Go 1066 MHz DDR3)
I have installed High Sierra ( 10.13 17A405 ) and its latest patch.
To be honest, I'm a very dumb about about OS, drivers. But as a mainstream customer, I read that the latest Nvidia GPU (series 10) could work with Sierra . So I bought a new GPU :
ASUS GeForce GTX 1050 Ti - ROG STRIX-GTX1050TI-4G-GAMING
I have installed the latest beta drivers on nvidia website (even If i saw in the supported product list, that my GPU wasn't there). The drivers installation worked. But when I installed the new card, the screen stayed black (I have waited more than 15 mn, and tried it a few times)
When I put back my original ATI radeon card, the mac pro works.
My question : what did i do wrong. I tried to PRAM the machine (do we say that ?) and still nothing. I have tried for days, to understand, but it's a bit like reading chinese (no offense) to me. If you can help me, link me, advise me, it would be very very nice.