NVIDIA RTX A6000 vs NVIDIA RTX PRO 4000 Blackwell, AI & Machine Learning Comparison
NVIDIA RTX A6000 wins 9 of 9 benchmarks, averaging 13.6% faster.
Both cards were measured first-party on our bench, same suite, same test rig.
What the numbers say
The gap is widest in Z-Image Turbo, where NVIDIA RTX A6000 leads by 22% (5.4 vs 4.425 images/min); the closest fight is Qwen3 4B (3% apart); VRAM decides part of this one: NVIDIA RTX A6000 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 RTX A6000 | NVIDIA RTX PRO 4000 Blackwell | Difference |
|---|---|---|---|
| Qwen3 4B tok/s | 184.34 | 179.58 | +3% |
| Llama 3.1 8B tok/s | 124.87 | 112.36 | +11% |
| Qwen2.5-Coder 14B tok/s | 68.51 | 60.62 | +13% |
| Qwen3 32B tok/s | 32.18 | 27.8 | +16% |
| Llama 3.3 70B tok/s | 15.73 | 0 | n/a |
| Stable Diffusion XL images/min | 10.02 | 8.56 | +17% |
| Z-Image Turbo images/min | 5.4 | 4.425 | +22% |
| FLUX.1 dev images/min | 2.164 | 0 | n/a |
| FLUX.1 Kontext dev images/min | 1.05 | 0 | n/a |
Whole-job comparison
How long each card takes to finish a complete pipeline, not just one model. NVIDIA RTX A6000 is faster on 1 of 2; NVIDIA RTX PRO 4000 Blackwell on 1.
| Workflow | NVIDIA RTX A6000 | NVIDIA RTX PRO 4000 Blackwell | Difference |
|---|---|---|---|
| 24-frame storyboard | 7.1 min | 6.4 min | NVIDIA RTX PRO 4000 Blackwell 1.10x faster |
| Full codebase review | 14.6 min | 16.5 min | NVIDIA RTX A6000 1.13x faster |
Specifications compared
| NVIDIA RTX A6000 | NVIDIA RTX PRO 4000 Blackwell | |
|---|---|---|
| VRAM | 48GB | 24GB |
| Architecture | Ampere | Blackwell |
| Memory bandwidth | 768 GB/s | 672 GB/s |
| Boost clock | 1,860 MHz | 2,617 MHz |
| TDP | 300 W | 140 W |
| Launch MSRP | $4,650 | $1,500 |
| Release | 2020-10-05 | 2025-08-01 |
FAQ
- Which is better for ai & machine learning: NVIDIA RTX A6000 or NVIDIA RTX PRO 4000 Blackwell?
- NVIDIA RTX A6000 performs better for ai & machine learning, winning 9 of 9 benchmarks in our suite with an average 13.6% advantage.
- What are the main hardware differences between NVIDIA RTX A6000 and NVIDIA RTX PRO 4000 Blackwell?
- NVIDIA RTX A6000 has 48GB VRAM and a 300W TDP, while NVIDIA RTX PRO 4000 Blackwell has 24GB VRAM and a 140W TDP.
- Does VRAM matter more than speed between NVIDIA RTX A6000 and NVIDIA RTX PRO 4000 Blackwell?
- For AI, yes, NVIDIA RTX A6000 fits 4 more of our 12 workloads than NVIDIA RTX PRO 4000 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 RTX A6000 and NVIDIA RTX PRO 4000 Blackwell?
- Z-Image Turbo: NVIDIA RTX A6000 leads by roughly 22% (5.4 vs 4.425 images/min) in our testing.
NVIDIA RTX A6000 full review · NVIDIA RTX PRO 4000 Blackwell full review · All AI & Machine Learning rankings