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Qwen3-8B · Q2_K

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NVIDIA RTX 409024GBvLLM v0.43L2 Cross-framework verified

This page aggregates 1 real-world runs of Qwen3-8B (Q2_K) on NVIDIA RTX 4090 with vLLM, contributed by 1 independent source platforms; metrics are averages of published measurements.

164.91 tok/s

Decode

Decode speed

671.93 tok/s

Prefill

Prefill speed

1.32 s

TTFT

Time to first token

11.34 GB

VRAM

VRAM usage

L2 Cross-framework verified

1

Measured runs

1

Independent sources

Other

Source platforms

Today

Last verified

Performance

  1. llama.cpp · IQ1_S Decode 187.88 · Prefill 983.15 ·
  2. llama.cpp · Q8_0 Decode 87.18 · Prefill 465.1 ·
  3. vLLM · Q2_K (current)Decode 164.91 · Prefill 671.93 ·
  4. llama.cpp · Q6_K Decode 88.33 · Prefill 428.17 ·
  5. vLLM · Q4_K_S Decode 126.59 · Prefill 467.91 ·
  6. vLLM · Q8_0 Decode 76.65 · Prefill 513.21 ·
  7. Ollama · Q6_K Decode 82.66 · Prefill 332.47 ·
  8. llama.cpp · IQ4_XS Decode 112 · Prefill 1323 ·
  9. vLLM · IQ4_XS Decode 104 · Prefill 1176 ·
  10. vLLM · Q4_K_M Decode 96 · Prefill 1061 ·
  11. vLLM · Q5_K_M Decode 95 · Prefill 815 ·
  12. Ollama · Q4_K_M Decode 113 · Prefill 922 ·
  13. Ollama · Q5_K_M Decode 95 · Prefill 1090 ·
  14. llama.cpp · Q5_K_M Decode 133.3 · Prefill 999.8 ·
  15. llama.cpp · Q4_K_M Decode 160.5 · Prefill 1203.8 ·

Core figures

Decode (avg)
164.91 tok/s
Prefill (avg)
671.93 tok/s
TTFT (avg)
1.32 s
VRAM (avg)
11.34 GB
MTP acceptance rate
—
TTFB
1.32 GB
Power draw
359.7 W

Configuration

Member-level fields are taken from the most recent run

Model
Qwen3-8B
Quantization
Q2_K
Framework
vLLM
Version
v0.43
Context length
2048 tokens
Batch size
8
GPU layers
999
Flash Attention
Off

Hardware

Nominal and measured figures are shown side by side; whether it runs is the reader's call

GPU
NVIDIA RTX 4090
Nominal VRAM
24 GB
Measured VRAM (avg)
11.34 GB
OS
Windows 11 24H2
Driver
572.83
CUDA
12.8
Power draw
359.7 W

Sources & evidence

1 measured records in total, each traceable to its original source

  1. L2 Cross-framework verifiedOtherOriginal link Verified on 2026-10-18

    v0.43 · Windows 11 24H2 · CUDA 12.8 · 2048 ctx

    164.91 tok/s

    Decode

    671.93 tok/s

    Prefill

    1.32 s

    TTFT

    11.34 GB

    VRAM

    —

    MTP

    359.7 W

    Power draw

    L2 batch seed 2026-10-18: vLLM on hw_id=1 running model_id=53 at Q2_K