40 GB VRAM (+8)1555 GB/s (+659)
B
Raises estimated decode speed by about 74%.79.3 tok/s decode
Raises estimated decode speed by about 74%.
Adds memory headroom for longer context windows and future model growth.
~$10,000 MSRP
Can Qwen3.5 27B run on RTX PRO 4500 Blackwell 32GB?
YES — Runs Great
B55Good
○Estimated from fit model
Qwen3.5 27B needs ~24.0 GB VRAM. RTX PRO 4500 Blackwell 32GB has 32.0 GB. With Q4_K_M quantization, expect ~46 tok/s.
Runtime: OllamaCapacity: RoomyBandwidth: HighStack: BasicBottleneck: Balanced
Share:
Operating mode
Choose the run profile you care about
Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.
Current mode
Balanced
Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.
Select quantization to explore
Q4_K_M (Medium quality) — 24.0 GB, 45.7 tok/s, Runs well
24.0 GB required32.0 GB available
75% VRAM used
Fit status
Runs well
Decode
45.7 tok/s
TTFT
4237 ms
Safe context
56K
Memory
24.0 GB / 32.0 GB
Memory breakdown
Weights16.5 GB
KV Cache3.2 GB
Runtime1.2 GB
Headroom3.2 GB
See how fast it feels
See how fast it feelsQwen3.5 27B on RTX PRO 4500 Blackwell 32GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API.
When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed.
Key benefits of running locally:
- Full privacy: your prompts never leave your machine
- No per-token cost or rate limits
- Works offline once the model is downloaded
- Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb:
Model size Q4 (4-bit) Q8 (8-bit) FP16
7B params ~4.3 GB ~7.5 GB ~14 GB
13B params ~7.9 GB ~13.9 GB ~26 GB
70B params ~42.7 GB ~74.9 GB ~140 GB
Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 45.7 tok/s decode · 4.2s TTFT (warm) · 114 tok/s prefill
What limits this setup
This setup is broadly balanced for this model.
No major red flags
This recommendation has enough memory headroom and acceptable estimated speed for the selected workload.
Best improvement path
Performance by workload
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | B | Runs well | 45.7 tok/s | 2311 ms | 56K |
| Coding | B | Runs well | 45.7 tok/s | 4237 ms | 56K |
| Agentic Coding | C | Tight fit | 45.7 tok/s | 6162 ms | 56K |
| Reasoning | B | Runs well | 45.7 tok/s | 5007 ms | 56K |
| RAG | C | Tight fit | 45.7 tok/s | 7703 ms | 56K |
Quantization options
How Qwen3.5 27B (27B params) fits at each quantization level on RTX PRO 4500 Blackwell 32GB (32.0 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 10.5 GB | Low | C47 |
Q3_K_S | 3 | 13.2 GB | Low | C48 |
NVFP4 | 4 |
Get started
Copy-paste commands to run Qwen3.5 27B on your machine.
Run
docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
--hf-repo "unsloth/Qwen3.5-27B-GGUF" \
--hf-file "Qwen3.5-27B-GGUF-Q4_K_M.gguf" \
-c 4096 -ngl 99Upgrade options