So I would like to operate with the RX580 and GTX 1660 Ti in one computer. And that's why I need a special adapter with which I can operate 2 graphics cards at the same time, and which I can then switch between my built-in RX580 or GTX1660 Ti. That is, if e.g. B. Minecraft Shader Mod under RX580 does not run so well, then I switch to GTX 1660 Ti and it should run better. Or the other way around, if other games under GTX 1660 Ti is too weak, then I switch back to the RX580 with a single click. Because I don't feel like constantly opening the housing and swapping the graphics card around.
Do you think there are such special adapters?
No, certainly not mixed.
No. And why should you install a strong and a weak graphics card, or use the weaker one at all?
Because of Minecraft shader mod, which runs worse under RX580 than with GTX 1050 Ti.
And then why don't you use the RTX 1660 ti that would also be installed in the PC?
Well, because I also need some games to play the 8GB graphics memory.
So I've never played a game that used more than 4.5 Gb of graphics memory. In some cases, the Rx 580 is too slow to combine 8 GB of graphics memory.