Qwen3.8-27B on a Single RTX 3090: High-Throughput Serving with vLLM

Repositorysyv-ai/qwen38-27b-rtx3090Tool

This repository provides an optimised serving configuration for running Qwen3.8-27B on a single 24 GB consumer GPU (RTX 3090) using vLLM 0.28.0 and contexts ranging from 150k to 262k tokens.

Key points

  1. Enables running a 27B parameter model on a single 24 GB card via selective quantization (int8 GEMMs, calibrated int4 lm_head).
  2. Includes two Docker Compose profiles: batch mode for concurrent API backends and single-user mode for low-latency interactive chats.
  3. Delivers ~1,000 tok/s aggregate decode rate at 64 concurrent requests, and ~120 tok/s in single-stream mode via speculative decoding (MTP or DFlash2).
  4. Provides an OpenAI-compatible API endpoint with key-based authentication.

Why it matters

Serving 27B-class models with long context windows typically requires enterprise-grade hardware or multi-GPU configurations. This setup demonstrates that modern quantization and speculative decoding techniques make production-grade throughput feasible on accessible consumer hardware.

Analysis

Targeted at self-hosters, researchers, and small development teams seeking cost-effective local inference. While it relies on pinned patches and custom quantization scripts on top of vLLM 0.28.0, the presence of prebuilt container images, validation scripts, and reproducibility benchmarks indicates a solid level of engineering maturity.

Found in

Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

Similar in content, found by the AI search.

  • Repository:MiaAI-Lab/Qwen3.8-27B-16gb-NVIDIA-GPUs-one-click-install

    One-Click Installer for Qwen3.8-27B on 16 GB Nvidia GPUs

    A serving kit for Windows and Linux enables running the Qwen3.8-27B language model locally on consumer Nvidia GPUs with 12 to 16 GB of VRAM using EXL3 quantisation.

    529starsPython

    AI & LLMs· Tool

  • Repository:MiaAI-Lab/DeepSeek-v4-Flash-One-DGX-Spark

    Running DeepSeek-v4-Flash on a Single DGX Spark

    An open-source launcher and Docker recipe for running DeepSeek V4 Flash 0731 (EXL3) on a single NVIDIA DGX Spark with 128 GiB unified memory.

    328starsPython

    AI & LLMs· Tool

  • Repository:eugr/spark-vllm-docker

    spark-vllm-docker: Optimised vLLM Docker Setups for DGX Spark

    spark-vllm-docker is an open-source tool providing Docker configurations and startup scripts to run vLLM on DGX Spark systems, supporting both single-node setups and multi-node clusters via Ray or PyTorch distributed mode.

    2.2kstarsShell

    AI & LLMs· Tool

  • Link:Unsloth AI

    Unsloth Releases Dynamic V3.0 GGUF Quants for Qwen3.8-27B

    Unsloth AI has published GGUF quantizations for the Qwen3.8-27B model under an Apache-2.0 licence. Utilizing their new Dynamic V3.0 quantization format, Unsloth claims over 10% higher top-1 accuracy at identical sizes compared to alternative quants. Qwen3.8-27B is a 27-billion parameter dense vision-language model featuring native text, image, and video comprehension alongside granular thinking controls.

    AI & LLMs· Tool

Let's talk about your project

Locations

  • Mattersburg
    Johann Nepomuk Bergerstraße 7/2/14
    7210 Mattersburg, Austria
  • Vienna
    Ungargasse 64-66/3/404
    1030 Wien, Austria

Parts of this content were created with the assistance of AI.