i got my graphic card, a : Nvidia Gigabyte GeForce GT 1030 Low Profile 2G
https://www.ldlc.com/fiche/PB00244093.html?offerId=AR201802030002
It's perfect, I can play with all the Dreamcast, Gamecube, Wii, PSP at 1080p, with anti aliasing, and anisotropic filter activated. For the PS2 games, I can play for most of them at 1080p, or at least at 720p
and of course at 60fps for every emulator
many thanks to @joinski for his advice