RTX 5090, just because it dual boots as a gaming rig. I have a llama server usually with `gemma4:31b` or `qwen3.6:27b` that powers my own automation / orchestration harness.
If I can go back in time, I would probably buy a more AI dedicated machine but I also don't regret finally being able to play Cyberpunk in 4k with great FPS and overkill mods.
I'm working on https://fabritorio.dev currently actively dogfooding in preparation for an official Show HN.
It's a visual way of setting up AI agents, so that you can have a quick overview over your automated workflows. Understanding where it might be wrong, as opposed to a personal AI assistant which can be a bit of a blackbox.
It is dumb but very specific to my use case but an agent that runs every evening to pull both my calendar and time logs (Google sheet). The calendar I do every morning to time block my day, then throughout the day I record what I did and categorize by Eisenhower's matrix. Then it compares map vs territory and I hopefully adjust my priors to do better planning or flag time sinks.
I am still extensively dogfooding but I think I'm mostly there for my use case, probably adding some other channel support like Telegram or Discord so that it can reach out your current self host. But yeah not a prio since at least for me most of my use cases are just within my own PC (or LAN).
EDIT: Quick summary of what it is, basically you can spin up agents seamlessly and modify, supports copy paste, etc. I want it visual as well and kind of "always on", think Factorio rather than every other workflow, run on start tools.
If I can go back in time, I would probably buy a more AI dedicated machine but I also don't regret finally being able to play Cyberpunk in 4k with great FPS and overkill mods.