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Llama-3-8B-Instruct · Q4_K_M

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NVIDIA RTX 509032GBllama.cpp b4200L0 Self-reported

This page aggregates 1 real-world runs of Llama-3-8B-Instruct (Q4_K_M) on NVIDIA RTX 5090 with llama.cpp, contributed by 1 independent source platforms; metrics are averages of published measurements.

285.3 tok/s

Decode

Decode speed

2,139.8 tok/s

Prefill

Prefill speed

0.05 s

TTFT

Time to first token

5.4 GB

VRAM

VRAM usage

L0 Self-reported

1

Measured runs

1

Independent sources

Other

Source platforms

Today

Last verified

Performance

  1. llama.cpp · Q8_0 Decode 162.5 · Prefill 1218.8 ·
  2. llama.cpp · Q5_K_M Decode 236.9 · Prefill 1776.8 ·
  3. llama.cpp · Q4_K_M (current)Decode 285.3 · Prefill 2139.8 ·

Core figures

Decode (avg)
285.3 tok/s
Prefill (avg)
2,139.8 tok/s
TTFT (avg)
0.05 s
VRAM (avg)
5.4 GB
MTP acceptance rate
—
TTFB
— GB
Power draw
— W

Configuration

Member-level fields are taken from the most recent run

Model
Llama-3-8B-Instruct
Quantization
Q4_K_M
Framework
llama.cpp
Version
b4200
Context length
4096 tokens
Batch size
512
GPU layers
99
Flash Attention
On

Hardware

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

GPU
NVIDIA RTX 5090
Nominal VRAM
32 GB
Measured VRAM (avg)
5.4 GB
OS
Linux
Driver
570.65
CUDA
12.6

Sources & evidence

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

  1. L0 Self-reportedOtherOriginal link Verified on 2026-10-06

    b4200 · Linux · CUDA 12.6 · 4096 ctx

    285.3 tok/s

    Decode

    2,139.8 tok/s

    Prefill

    0.05 s

    TTFT

    5.4 GB

    VRAM

    —

    MTP

    — W

    Power draw

    L0 理论估算(add-1000-records-batch3)