The verdict

Plex
Nvidia Quadro T400 transcodes more streams (~24 vs ~20).
Local AI
Intel Arc A380 has more VRAM (6GB vs 2GB) - up to ~7B (Q3-Q4).

Which wins for each job

Job Intel Arc A380 Nvidia Quadro T400
Plex transcode ~20 streams ~24 streams win
Frigate NVR ~25 cameras ~25 cameras
Local LLM 6GB VRAM win 2GB VRAM
Fits a mini-PC low-profile PCIe low-profile PCIe

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 Intel Arc A380 Nvidia Quadro T400
Price (list) $130 $130
Type gpu gpu
Interface pcie pcie
Transcode H.264/HEVC/AV1 encode H.264/HEVC (NVENC Turing)
Frigate detector OpenVINO TensorRT
TOPS - -
VRAM (GB) 6 2
Low profile yes yes
GPU sharing - vgpu (unlock)
Power (W) 75 30