NVIDIA A40 vs NVIDIA RTX PRO 4500 Blackwell, AI & Machine Learning Comparison
NVIDIA RTX PRO 4500 Blackwell wins 6 of 8 benchmarks, averaging 38.4% faster.
NVIDIA A40's numbers are anchored estimates calibrated against our measured cards, pending first-party measurement. Treat small gaps as ties.
What the numbers say
The gap is widest in Z-Image Turbo, where NVIDIA RTX PRO 4500 Blackwell leads by 100% (3.225 vs 6.45 images/min); the closest fight is Llama 3.1 8B (38% apart); VRAM decides part of this one: NVIDIA A40 runs 9 of our 12 AI workloads while the other card runs 8, models that don't fit score zero.
Benchmark results head-to-head
| Benchmark | NVIDIA A40 | NVIDIA RTX PRO 4500 Blackwell | Difference |
|---|---|---|---|
| Qwen3 4B tok/s | 160.79 | 221.92 | -28% |
| Llama 3.1 8B tok/s | 106.18 | 146.19 | -27% |
| Qwen2.5-Coder 14B tok/s | 57.85 | 80.09 | -28% |
| Qwen3 32B tok/s | 26.89 | 37.61 | -29% |
| Llama 3.3 70B tok/s | 0 | 0 | n/a |
| Stable Diffusion XL images/min | 9.2 | 13.1 | -30% |
| Z-Image Turbo images/min | 3.225 | 6.45 | -50% |
| FLUX.1 dev images/min | 1.95 | 1.414 | +38% |
Whole-job comparison
How long each card takes to finish a complete pipeline, not just one model. NVIDIA A40 is faster on 0 of 2; NVIDIA RTX PRO 4500 Blackwell on 2.
| Workflow | NVIDIA A40 | NVIDIA RTX PRO 4500 Blackwell | Difference |
|---|---|---|---|
| 24-frame storyboard | 10.2 min | 6.2 min | NVIDIA RTX PRO 4500 Blackwell 1.65x faster |
| Full codebase review | 17.3 min | 12.5 min | NVIDIA RTX PRO 4500 Blackwell 1.38x faster |
Specifications compared
| NVIDIA A40 | NVIDIA RTX PRO 4500 Blackwell | |
|---|---|---|
| VRAM | 48GB | 32GB |
| Architecture | Ampere | Blackwell |
| Memory bandwidth | 696 GB/s | 896 GB/s |
| Boost clock | 1,740 MHz | 2,407 MHz |
| TDP | 300 W | 200 W |
| Launch MSRP | $5,000 | $2,600 |
| Release | 2020-10-05 | 2025-08-01 |
FAQ
- Which is better for ai & machine learning: NVIDIA A40 or NVIDIA RTX PRO 4500 Blackwell?
- NVIDIA RTX PRO 4500 Blackwell performs better for ai & machine learning, winning 6 of 8 benchmarks in our suite with an average 38.4% advantage.
- What are the main hardware differences between NVIDIA A40 and NVIDIA RTX PRO 4500 Blackwell?
- NVIDIA A40 has 48GB VRAM and a 300W TDP, while NVIDIA RTX PRO 4500 Blackwell has 32GB VRAM and a 200W TDP.
- Does VRAM matter more than speed between NVIDIA A40 and NVIDIA RTX PRO 4500 Blackwell?
- For AI, yes, NVIDIA A40 fits 2 more of our 12 workloads than NVIDIA RTX PRO 4500 Blackwell. 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 A40 and NVIDIA RTX PRO 4500 Blackwell?
- Z-Image Turbo: NVIDIA RTX PRO 4500 Blackwell leads by roughly 100% (3.225 vs 6.45 images/min) in our testing.
NVIDIA A40 full review · NVIDIA RTX PRO 4500 Blackwell full review · All AI & Machine Learning rankings