The q4_0 V-cache + flash-attention path is pathological on the GP100: 1.28
tok/s generation at 5-8% GPU util. q8_0 V-cache gives 9.2 tok/s and still fits
64k context in 16GB (15.3GB used, ~950MB free).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>