3 keyboards and 2 mice.

From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by AlpΓ‘r-Etele MΓ©der, licensed under CC BY 3.0
3 keyboards and 2 mice.

American Megatrends make perfectly balanced BIOS with no glitches - Bhagavad Gita, circa second or first century BCE, literal translation
Funny thing is, I have 2 keyboards and a standalone numpad and one mouse, but one of the keyboards registers itself in the system as keyboard and mouse, because it has mouse moving hotkeys.
So my system literally thinks I have 3 keyboards and 2 mice.
After a work day is over I shove the split keyboard under the monitor and pull out the gaming one and place the mouse differently.
People that visit always comment on how weird that is, but it works for me.
Yeah get a simple but recent AMD card, older cards, especially nVidia are a nightmare. I had an old 980 TI which as a really good card still, but I couldn't use it anymore because everything kept breaking. So I got me a recent AMD card and it has been running perfectly.
I had an old laptop with GeForce 8600M GT card, but it would only work with Linux Kernel versions up to 5.4.
Nice! :D Mind sharing the model number? :D