NVIDIA L4 vs NVIDIA RTX PRO 4000 Blackwell, AI & Machine Learning Comparison
NVIDIA RTX PRO 4000 Blackwell wins 7 of 11 benchmarks, averaging 99.8% faster.
Both cards were measured first-party on our bench, same suite, same test rig.
What the numbers say
The gap is widest in Qwen3-32B, where NVIDIA RTX PRO 4000 Blackwell leads by 124% (12.42 vs 27.8 tok/s); the closest fight is Stable Diffusion XL (65% apart); VRAM decides part of this one: NVIDIA RTX PRO 4000 Blackwell runs 138 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 L4 | NVIDIA RTX PRO 4000 Blackwell | Difference |
|---|---|---|---|
| Qwen3-4B tok/s | 84 | 179.58 | -53% |
| Llama 3.1 8B tok/s | 50.45 | 112.36 | -55% |
| Qwen2.5-Coder 14B tok/s | 27.46 | 60.62 | -55% |
| Qwen3-32B tok/s | 12.42 | 27.8 | -55% |
| Llama 3.3 70B tok/s | 0 | 0 | n/a |
| Stable Diffusion XL images/min | 5.18 | 8.56 | -39% |
| Z-Image Turbo images/min | 2.475 | 4.425 | -44% |
| FLUX.1 dev images/min | 0 | 0 | n/a |
| FLUX.1 Kontext dev images/min | 0 | 0 | n/a |
| Qwen-Image-Edit images/min | 0 | 0 | n/a |
| Wan 2.2 5B (720p) frames/s | 0.15 | 0.26 | -42% |
Whole-job comparison
How long each card takes to finish a complete pipeline, not just one model. NVIDIA L4 is faster on 0 of 3; NVIDIA RTX PRO 4000 Blackwell on 3.
| Workflow | NVIDIA L4 | NVIDIA RTX PRO 4000 Blackwell | Difference |
|---|---|---|---|
| 24-frame storyboard | 12.2 min | 6.4 min | NVIDIA RTX PRO 4000 Blackwell 1.90x faster |
| Full codebase review | 36.4 min | 16.5 min | NVIDIA RTX PRO 4000 Blackwell 2.21x faster |
| 10 short social clips | 60.3 min | 34.2 min | NVIDIA RTX PRO 4000 Blackwell 1.76x faster |
Specifications compared
| NVIDIA L4 | NVIDIA RTX PRO 4000 Blackwell | |
|---|---|---|
| VRAM | 24GB | 24GB |
| Architecture | Ada Lovelace | Blackwell |
| Memory bandwidth | 300 GB/s | 672 GB/s |
| Boost clock | 2,040 MHz | 2,617 MHz |
| TDP | 72 W | 140 W |
| Launch MSRP | $2,500 | $1,500 |
| Release | 2023-03-21 | 2025-08-01 |
FAQ
- Which is better for ai & machine learning: NVIDIA L4 or NVIDIA RTX PRO 4000 Blackwell?
- NVIDIA RTX PRO 4000 Blackwell performs better for ai & machine learning, winning 7 of 11 benchmarks in our suite with an average 99.8% advantage.
- What are the main hardware differences between NVIDIA L4 and NVIDIA RTX PRO 4000 Blackwell?
- NVIDIA L4 has 24GB VRAM and a 72W TDP, while NVIDIA RTX PRO 4000 Blackwell has 24GB VRAM and a 140W TDP.
- Does VRAM matter more than speed between NVIDIA L4 and NVIDIA RTX PRO 4000 Blackwell?
- For AI, yes, NVIDIA RTX PRO 4000 Blackwell fits 20 more of our 12 workloads than NVIDIA L4. 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 L4 and NVIDIA RTX PRO 4000 Blackwell?
- Qwen3-32B: NVIDIA RTX PRO 4000 Blackwell leads by roughly 124% (12.42 vs 27.8 tok/s) in our testing.
NVIDIA L4 full review · NVIDIA RTX PRO 4000 Blackwell full review · All AI & Machine Learning rankings