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Qwen 4 720B · IQ2_XS
NVIDIA RTX 409024GBllama.cpp b4200L0 Self-reported
This page aggregates 1 real-world runs of Qwen 4 720B (IQ2_XS) on NVIDIA RTX 4090 with llama.cpp, contributed by 1 independent source platforms; metrics are averages of published measurements.
3.2 tok/s
Decode
Decode speed
24 tok/s
Prefill
Prefill speed
4.17 s
TTFT
Time to first token
24 GB
VRAM
VRAM usage
L0 Self-reported
1
Measured runs
1
Independent sources
Other
Source platforms
Today
Last verified
Performance
- llama.cpp · IQ2_XS (current)Decode 3.2 · Prefill 24 ·
Core figures
- Decode (avg)
- 3.2 tok/s
- Prefill (avg)
- 24 tok/s
- TTFT (avg)
- 4.17 s
- VRAM (avg)
- 24 GB
- MTP acceptance rate
- —
- TTFB
- — GB
- Power draw
- — W
Configuration
Member-level fields are taken from the most recent run
- Model
- Qwen 4 720B
- Quantization
- IQ2_XS
- 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 4090
- Nominal VRAM
- 24 GB
- Measured VRAM (avg)
- 24 GB
- OS
- Linux
- Driver
- 570.65
- CUDA
- 12.6
Sources & evidence
1 measured records in total, each traceable to its original source
b4200 · Linux · CUDA 12.6 · 4096 ctx
3.2 tok/s
Decode
24 tok/s
Prefill
4.17 s
TTFT
24 GB
VRAM
—
MTP
— W
Power draw
L0 理论估算：基于显存带宽 ÷ 模型体积公式，结合框架实测效率因子校准