Qwen3.8-27B serving at ~1,094 tok/s on one power-limited RTX 3090.

Two published vLLM configs for a single 24GB card at 250W with 150k context: batch mode measuring ~1,094 tok/s steady-state decode at 64 concurrent (942 end-to-end, rising to ~1,222/1,042 with all layers int8), and single-user mode at 114-122 tok/s single-stream via MTP speculation with four cheap drafts, calibrated int4 lm_head and split-KV verify attention. (GitHub) The standout number: 381 tok/s at 25k context when the model reproduces its own context, quoting a document or applying an edit, using DFlash2 with 15 drafted tokens per verify step. Speculation wins below roughly 8 concurrent users, plain batching wins above.