I had these sorts of issues too, always assumed it was something i’d goofed - but have never had similar with Caddy.

I used NPM as well, and eventually just got sick of various issues i’d had with it (probably all my fault, but…) so switched to Caddy and it was just so much easier and reliable for me. I’d heartily recommend it.

I put a passively cooled GT1030 in mine and its doing the decoding & tensorrt detection for 4x 1080p cameras just fine, based on its current load I expect I could add another 4.

I couldn’t tell you if that specific Amcrest camera will work, but I have 2 of the recommended ones on the frigate docs (https://www.amazon.com/gp/product/B083G9KT4C/) and they work.