Originally published on rohitraj.tech
NVIDIA quietly listed the RTX PRO 5500 Blackwell: 21,760 CUDA cores, 84GB of ECC GDDR7, 600W, no price yet. The news sites stopped at the spec sheet. Here is the question that matters if you run models locally: what actually fits in 84GB, what still does not, and when a used A100 or the API is the smarter buy.
Read the full version with code samples, diagrams, and architecture details: NVIDIA RTX PRO 5500 Blackwell: What Actually Fits in 84GB for Local LLMs (2026)
More engineering notes: rohitraj.tech/notes
Top comments (0)