DeepSeek V4 Pro demands 21 RTX 3090s

DeepSeek's 1.6 trillion parameter V4 Pro is a datacenter-only model that pushes the limits of what the local LLM community can realistically deploy. At 4-bit quantization, it requires over 500GB of VRAM, making even quad-3090 setups insufficient for full residency. While the new CSA and HCA architectures offer significant KV cache efficiency, this primarily benefits high-concurrency API serving rather than single-user hardware constraints. For most enthusiasts, the optimized Flash variant or API access remains the only practical path to frontier performance.