NVIDIA RTX A4000 vs NVIDIA RTX PRO 4500 Blackwell, AI & Machine Learning Comparison
NVIDIA RTX PRO 4500 Blackwell wins 7 of 9 benchmarks, averaging 107.3% faster.
Both cards were measured first-party on our bench, same suite, same test rig.
What the numbers say
The gap is widest in Stable Diffusion XL, where NVIDIA RTX PRO 4500 Blackwell leads by 150% (5.24 vs 13.1 images/min); the closest fight is Qwen3 4B (91% apart); VRAM decides part of this one: NVIDIA RTX PRO 4500 Blackwell runs 9 of our 12 AI workloads while the other card runs 4, models that don't fit score zero.
Benchmark results head-to-head
| Benchmark | NVIDIA RTX A4000 | NVIDIA RTX PRO 4500 Blackwell | Difference |
|---|---|---|---|
| Qwen3 4B tok/s | 116.23 | 221.92 | -48% |
| Llama 3.1 8B tok/s | 75.52 | 146.19 | -48% |
| Qwen2.5-Coder 14B tok/s | 41.13 | 80.09 | -49% |
| Qwen3 32B tok/s | 0 | 37.61 | n/a |
| Llama 3.3 70B tok/s | 0 | 0 | n/a |
| Stable Diffusion XL images/min | 5.24 | 13.1 | -60% |
| FLUX.1 dev images/min | 0 | 1.414 | n/a |
| FLUX.1 Kontext dev images/min | 0 | 0.879 | n/a |
| Qwen-Image-Edit images/min | 0 | 0 | n/a |
Whole-job comparison
How long each card takes to finish a complete pipeline, not just one model. NVIDIA RTX A4000 is faster on 0 of 1; NVIDIA RTX PRO 4500 Blackwell on 1.
| Workflow | NVIDIA RTX A4000 | NVIDIA RTX PRO 4500 Blackwell | Difference |
|---|---|---|---|
| Full codebase review | 24.3 min | 12.5 min | NVIDIA RTX PRO 4500 Blackwell 1.95x faster |
Specifications compared
| NVIDIA RTX A4000 | NVIDIA RTX PRO 4500 Blackwell | |
|---|---|---|
| VRAM | 16GB | 32GB |
| Architecture | Ampere | Blackwell |
| Memory bandwidth | 448 GB/s | 896 GB/s |
| Boost clock | 1,560 MHz | 2,407 MHz |
| TDP | 140 W | 200 W |
| Launch MSRP | $999 | $2,600 |
| Release | 2021-04-12 | 2025-08-01 |
FAQ
- Which is better for ai & machine learning: NVIDIA RTX A4000 or NVIDIA RTX PRO 4500 Blackwell?
- NVIDIA RTX PRO 4500 Blackwell performs better for ai & machine learning, winning 7 of 9 benchmarks in our suite with an average 107.3% advantage.
- What are the main hardware differences between NVIDIA RTX A4000 and NVIDIA RTX PRO 4500 Blackwell?
- NVIDIA RTX A4000 has 16GB VRAM and a 140W TDP, while NVIDIA RTX PRO 4500 Blackwell has 32GB VRAM and a 200W TDP.
- Does VRAM matter more than speed between NVIDIA RTX A4000 and NVIDIA RTX PRO 4500 Blackwell?
- For AI, yes, NVIDIA RTX PRO 4500 Blackwell fits 4 more of our 12 workloads than NVIDIA RTX A4000. A model that exceeds VRAM doesn't run slower, it doesn't run at all, so the card that fits the model wins that workload outright.
- Where is the biggest performance difference between NVIDIA RTX A4000 and NVIDIA RTX PRO 4500 Blackwell?
- Stable Diffusion XL: NVIDIA RTX PRO 4500 Blackwell leads by roughly 150% (5.24 vs 13.1 images/min) in our testing.
NVIDIA RTX A4000 full review · NVIDIA RTX PRO 4500 Blackwell full review · All AI & Machine Learning rankings