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Qwen3.5-4B · Q4_K_S
NVIDIA RTX 4080 Super16GBvLLM v0.50L2 Cross-framework verified
This page aggregates 1 real-world runs of Qwen3.5-4B (Q4_K_S) on NVIDIA RTX 4080 Super with vLLM, contributed by 1 independent source platforms; metrics are averages of published measurements.
190.65 tok/s
Decode
Decode speed
787.91 tok/s
Prefill
Prefill speed
2.17 s
TTFT
Time to first token
8.65 GB
VRAM
VRAM usage
L2 Cross-framework verified
1
Measured runs
1
Independent sources
Other
Source platforms
17 days ago
Last verified
Performance
- vLLM · Q4_K_S (current)Decode 190.65 · Prefill 787.91 ·
- Ollama · IQ2_M Decode 242.65 · Prefill 957.57 ·
- Ollama · Q2_K Decode 231.86 · Prefill 790.98 ·
- vLLM · Q5_K_M Decode 152.06 · Prefill 772.68 ·
- Ollama · Q3_K_L Decode 202.33 · Prefill 955.67 ·
Core figures
- Decode (avg)
- 190.65 tok/s
- Prefill (avg)
- 787.91 tok/s
- TTFT (avg)
- 2.17 s
- VRAM (avg)
- 8.65 GB
- MTP acceptance rate
- —
- TTFB
- 1.53 GB
- Power draw
- 214.8 W
Configuration
Member-level fields are taken from the most recent run
- Model
- Qwen3.5-4B
- Quantization
- Q4_K_S
- Framework
- vLLM
- Version
- v0.50
- Context length
- 32768 tokens
- Batch size
- 8
- GPU layers
- 999
- Flash Attention
- Off
Hardware
Nominal and measured figures are shown side by side; whether it runs is the reader's call
- GPU
- NVIDIA RTX 4080 Super
- Nominal VRAM
- 16 GB
- Measured VRAM (avg)
- 8.65 GB
- OS
- Ubuntu 24.04
- Driver
- 570.86
- CUDA
- 12.8
- Power draw
- 214.8 W
Sources & evidence
1 measured records in total, each traceable to its original source
v0.50 · Ubuntu 24.04 · CUDA 12.8 · 32768 ctx
190.65 tok/s
Decode
787.91 tok/s
Prefill
2.17 s
TTFT
8.65 GB
VRAM
—
MTP
214.8 W
Power draw
L2 batch seed 2026-10-19: vLLM on hw_id=20 running model_id=48 at Q4_K_S