I recently found out that there are ARM SoCs that have some PCIe lanes, which surprised me. If that's true, I'm surprised nobody's tried to use this, especially in the hardcore Free Software spaces: For x86 PCs, we have good free GPU drivers for old Nvidia cards, but can't use modern CPUs due to...
I have a few of these. USB plug n' play, work with every device I've tried them on. Made to mount to a DualShock controller. Good for embedded projects and custom handhelds.