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Llama-3.1-8B-Instruct · Q4_K_M

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AMD Radeon RX 9070 XT16GBvLLM v0.55L2 Cross-framework verified

This page aggregates 1 real-world runs of Llama-3.1-8B-Instruct (Q4_K_M) on AMD Radeon RX 9070 XT with vLLM, contributed by 1 independent source platforms; metrics are averages of published measurements.

144.21 tok/s

Decode

Decode speed

558.74 tok/s

Prefill

Prefill speed

2.13 s

TTFT

Time to first token

15.2 GB

VRAM

VRAM usage

L2 Cross-framework verified

1

Measured runs

1

Independent sources

Other

Source platforms

Today

Last verified

Performance

  1. llama.cpp · IQ4_XS Decode 135.74 · Prefill 591.43 ·
  2. vLLM · Q3_K_S Decode 162.87 · Prefill 574.19 ·
  3. vLLM · Q4_K_M (current)Decode 144.21 · Prefill 558.74 ·

Core figures

Decode (avg)
144.21 tok/s
Prefill (avg)
558.74 tok/s
TTFT (avg)
2.13 s
VRAM (avg)
15.2 GB
MTP acceptance rate
—
TTFB
1.15 GB
Power draw
206.1 W

Configuration

Member-level fields are taken from the most recent run

Model
Llama-3.1-8B-Instruct
Quantization
Q4_K_M
Framework
vLLM
Version
v0.55
Context length
8192 tokens
Batch size
32
GPU layers
999
Flash Attention
On

Hardware

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

GPU
AMD Radeon RX 9070 XT
Nominal VRAM
16 GB
Measured VRAM (avg)
15.2 GB
OS
Windows 11 23H2
Driver
amdgpu-pro 24.20
CUDA
12.4
Power draw
206.1 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

    v0.55 · Windows 11 23H2 · CUDA 12.4 · 8192 ctx

    144.21 tok/s

    Decode

    558.74 tok/s

    Prefill

    2.13 s

    TTFT

    15.2 GB

    VRAM

    —

    MTP

    206.1 W

    Power draw

    L2 batch seed 2026-10-18: vLLM on hw_id=16 running model_id=68 at Q4_K_M