The verdict

Plex
Nvidia Quadro T600 transcodes more streams (~24 vs ~12).
Local AI
Nvidia RTX 3060 8GB has more VRAM (8GB vs 4GB) - up to ~8B (Q4).
Fit
Nvidia Quadro T600 is easier to add to a mini-PC (low-profile PCIe).

Which wins for each job

Job Nvidia Quadro T600 Nvidia RTX 3060 8GB
Plex transcode ~24 streams win ~12 streams
Frigate NVR ~25 cameras ~25 cameras
Local LLM 4GB VRAM 8GB VRAM win
Fits a mini-PC low-profile PCIe win full-size PCIe, DIY build

Approximate - capacity estimates from curated specs, the same logic as the recommender. Verify against your exact setup. Prices move; check the retailer.

Full specs

Spec Nvidia Quadro T600 Nvidia RTX 3060 8GB
Price (list) $180 $170
Type gpu gpu
Interface pcie pcie
Transcode H.264/HEVC (NVENC Turing) H.264/HEVC (NVENC Ampere)
Frigate detector TensorRT TensorRT
TOPS - -
VRAM (GB) 4 8
Low profile yes no
GPU sharing vgpu (unlock) -
Power (W) 40 170