My home AI lab: an old gaming laptop as the brain, a dual Arc Pro B70 tower as the muscle, and a fish tank that’s next for sensors

The headless OMEN laptop (lid closed) is the always-on node. It runs the vector DB, a Matrix server and a small local LLM. The tower under the printer has 2× Arc Pro B70 (64 GB VRAM) for big models. Everything talks over Tailscale, with LAN fallback. The topology is on the laptop screen; the full diagram is in the second image. Next up is pH, dissolved-oxygen and conductivity sensors in the fish tank, which will feed the same system. AMA.