Ah, I see what you mean. Yeah, no way around that without a GPU or a processor with integrated graphics.

You should be able to get a used workstation GPU for $20-40 on eBay. Something from Dell, or a basic nvidia quadro would do the trick. If you could sell the 1660 super for more than that, could be worth the effort.

Alternatively, the 1660 Super would do the trick nicely if you ever needed to transcode video streams, like from running Jellyfin or Plex.

However, I was never able to have the server completely headless.

Depending on what you mean by “completely headless” it may or may not be possible.

Simplest solution: When you’re installing OS and setting up the system, you have a GPU and monitor for local access. Once you’ve configured ssh access, you no longer need the GPU or monitor. You could get by with a cheap “Just display something” graphics card and keep it permanently installed, only plugging in the monitor when something is not working right. This is what I used to do.

Downside: If you ever need to perform an OS reinstall, debug boot issues, or change BIOS settings, you will need to reconnect the monitor.

Medium tech solution: Install a cheap graphics card, and then connect your server with something like PiKVM or BliKVM. They can plug into your GPU and motherboard and provide a web interface to control your server physically. Everything from controlling physical power buttons to emulating a USB storage device is possible. You’ll be able to boot from cold start, install OS, and change BIOS settings without ever needing a physical monitor. This is what I do now.

Downsides: Additional cost to buy the KVM hardware, plus now you have to remember to keep your KVM software updated. Anyone who controls the KVM has equivalent physical access to the server, so keep it secure and off the public internet.

Yes. Such a transaction would be legally classified as a service: You pay publisher a one-time fee for access to the right to play their game over a known period of time.