Qwen3.8 27B
on NVIDIA RTX 5090 · MegaCapybara · 800,000 ctx
Use cases
codingagenticlong-context
Summary
User announces MegaCapybara, a purpose-built engine for RTX 5090 focused on Qwen3.8 27B. Claims roughly twice the decode speed of Ninfer, reaching up to 650 t/s in small bursts and 2600 t/s with 12 concurrent agent slots at 800k context. Setup includes custom kernels, Dflash2 with DSpark headers, draft trees, and smart VRAM-RAM-DISC cache management.