Because of how wide and thin it is, it looks like a phased antenna array to me. It’s a way to create cheaper, performant antennas. You see this form factor with a bunch of RF applications in UHF to EHF range.
Here’s an example of a random mmWave radar board. Imagine a plastic case over this to keep out dust and rain.

https://www.alibaba.com/product-detail/60Ghz-long-distance-Millimeter-wave-radar_1601046927371.html


On the CPU side, the only Intel procs I’ve used are old enterprise gear for my homelab. No issues there.
On the GPU side, I’ve exclusively used Nvidia for… Actually I don’t remember the last time I used a non-nvidia GPU. The most common problem I’ve run into is updating my drivers and forgetting to reboot. the only other problem I’ve had is years back, I bought the latest gen card, and Nvidia hadn’t updated their official Linux drivers yet.
With your hardware, I’d expect things to work fine.