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Llama-3-8B-Instruct · Q5_K_S

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NVIDIA RTX Spark128GBllama.cpp v0.43L2 Cross-framework verified

This page aggregates 1 real-world runs of Llama-3-8B-Instruct (Q5_K_S) on NVIDIA RTX Spark with llama.cpp, contributed by 1 independent source platforms; metrics are averages of published measurements.

49.33 tok/s

Decode

Decode speed

259.05 tok/s

Prefill

Prefill speed

1.4 s

TTFT

Time to first token

17.22 GB

VRAM

VRAM usage

L2 Cross-framework verified

1

Measured runs

1

Independent sources

Other

Source platforms

17 days ago

Last verified

Performance

  1. llama.cpp · Q4_K_M Decode 50.11 · Prefill 261.83 ·
  2. llama.cpp · Q5_K_S (current)Decode 49.33 · Prefill 259.05 ·
  3. Ollama · Q3_K_S Decode 56.77 · Prefill 268.38 ·
  4. Ollama · Q4_K_M Decode 51.27 · Prefill 167.27 ·

Core figures

Decode (avg)
49.33 tok/s
Prefill (avg)
259.05 tok/s
TTFT (avg)
1.4 s
VRAM (avg)
17.22 GB
MTP acceptance rate
—
TTFB
0.39 GB
Power draw
58.6 W

Configuration

Member-level fields are taken from the most recent run

Model
Llama-3-8B-Instruct
Quantization
Q5_K_S
Framework
llama.cpp
Version
v0.43
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 Spark
Nominal VRAM
128 GB
Measured VRAM (avg)
17.22 GB
OS
Windows 11 24H2
Driver
NVIDIA 590.10
CUDA
13.0
Power draw
58.6 W
Reference price
$2,399 · updated 2026-10-19

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Sources & evidence

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

  1. L2 Cross-framework verifiedOtherOriginal link Verified on 2026-10-19

    v0.43 · Windows 11 24H2 · CUDA 13.0 · 4096 ctx

    49.33 tok/s

    Decode

    259.05 tok/s

    Prefill

    1.4 s

    TTFT

    17.22 GB

    VRAM

    —

    MTP

    58.6 W

    Power draw

    L2 batch seed 2026-10-19: llama.cpp on hw_id=110 running model_id=69 at Q5_K_S