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gemma-4-12B-it · FP16

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NVIDIA RTX Spark128GBOllama v0.22L2 Cross-framework verified

This page aggregates 1 real-world runs of gemma-4-12B-it (FP16) on NVIDIA RTX Spark with Ollama, contributed by 1 independent source platforms; metrics are averages of published measurements.

18.58 tok/s

Decode

Decode speed

81.79 tok/s

Prefill

Prefill speed

1.02 s

TTFT

Time to first token

48.72 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 · Q3_K_L Decode 43.89 · Prefill 217.76 ·
  2. llama.cpp · Q4_K_M Decode 39.59 · Prefill 158.74 ·
  3. Ollama · FP16 (current)Decode 18.58 · Prefill 81.79 ·
  4. Ollama · Q4_K_M Decode 36.57 · Prefill 126.77 ·

Core figures

Decode (avg)
18.58 tok/s
Prefill (avg)
81.79 tok/s
TTFT (avg)
1.02 s
VRAM (avg)
48.72 GB
MTP acceptance rate
—
TTFB
0.15 GB
Power draw
68.9 W

Configuration

Member-level fields are taken from the most recent run

Model
gemma-4-12B-it
Quantization
FP16
Framework
Ollama
Version
v0.22
Context length
32768 tokens
Batch size
256
GPU layers
20
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)
48.72 GB
OS
Windows 11 24H2
Driver
NVIDIA 590.10
CUDA
13.0
Power draw
68.9 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

    v0.22 · Windows 11 24H2 · CUDA 13.0 · 32768 ctx

    18.58 tok/s

    Decode

    81.79 tok/s

    Prefill

    1.02 s

    TTFT

    48.72 GB

    VRAM

    —

    MTP

    68.9 W

    Power draw

    L2 batch seed 2026-10-19: Ollama on hw_id=110 running model_id=65 at FP16