The verdict

Plex
Nvidia RTX 2000 Ada transcodes more streams (~24 vs ~12).
Fit
Nvidia RTX 2000 Ada is easier to add to a mini-PC (low-profile PCIe).

Which wins for each job

Job Nvidia RTX 2000 Ada Nvidia RTX 5070 Ti
Plex transcode ~24 streams win ~12 streams
Frigate NVR ~25 cameras ~25 cameras
Local LLM 16GB VRAM 16GB VRAM
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 RTX 2000 Ada Nvidia RTX 5070 Ti
Price (list) $625 $749
Type gpu gpu
Interface pcie pcie
Transcode H.264/HEVC/AV1 encode (NVENC Ada) H.264/HEVC/AV1 (NVENC Blackwell 4:2:2)
Frigate detector TensorRT TensorRT
TOPS - -
VRAM (GB) 16 16
Low profile yes no
GPU sharing vgpu -
Power (W) 70 300