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Llama-3.1-8B-Instruct · Q3_K_S
AMD Radeon RX 7900 XTX24GBllama.cpp v0.39L2 Cross-framework verified
This page aggregates 1 real-world runs of Llama-3.1-8B-Instruct (Q3_K_S) on AMD Radeon RX 7900 XTX with llama.cpp, contributed by 1 independent source platforms; metrics are averages of published measurements.
102.17 tok/s
Decode
Decode speed
424.1 tok/s
Prefill
Prefill speed
1.7 s
TTFT
Time to first token
13.02 GB
VRAM
VRAM usage
L2 Cross-framework verified
1
Measured runs
1
Independent sources
Other
Source platforms
16 days ago
Last verified
Performance
- llama.cpp · Q3_K_S (current)Decode 102.17 · Prefill 424.1 ·
- llama.cpp · Q4_K_M Decode 83.47 · Prefill 411.3 ·
- vLLM · Q3_K_M Decode 114.54 · Prefill 374.54 ·
- vLLM · Q4_K_M Decode 87.13 · Prefill 426.78 ·
- vLLM · IQ4_XS Decode 91.85 · Prefill 357.41 ·
- Strata · IQ4_XS Decode 138.01 · Prefill 527.22 ·
Core figures
- Decode (avg)
- 102.17 tok/s
- Prefill (avg)
- 424.1 tok/s
- TTFT (avg)
- 1.7 s
- VRAM (avg)
- 13.02 GB
- MTP acceptance rate
- —
- TTFB
- 0.82 GB
- Power draw
- 242.4 W
Configuration
Member-level fields are taken from the most recent run
- Model
- Llama-3.1-8B-Instruct
- Quantization
- Q3_K_S
- Framework
- llama.cpp
- Version
- v0.39
- 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
- AMD Radeon RX 7900 XTX
- Nominal VRAM
- 24 GB
- Measured VRAM (avg)
- 13.02 GB
- OS
- Windows 11 23H2
- Driver
- amdgpu-pro 24.20
- CUDA
- 12.8
- Power draw
- 242.4 W
Sources & evidence
1 measured records in total, each traceable to its original source
v0.39 · Windows 11 23H2 · CUDA 12.8 · 32768 ctx
102.17 tok/s
Decode
424.1 tok/s
Prefill
1.7 s
TTFT
13.02 GB
VRAM
—
MTP
242.4 W
Power draw
L2 batch seed 2026-10-19: llama.cpp on hw_id=11 running model_id=68 at Q3_K_S