NVIDIA L40S vs NVIDIA RTX A4000, AI & Machine Learning Comparison
NVIDIA L40S wins 10 of 10 benchmarks, averaging 117% 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 L40S leads by 225% (17.02 vs 5.24 images/min); the closest fight is Llama-3.1-8B (79% apart); VRAM decides part of this one: NVIDIA RTX A4000 runs 152 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 L40S | NVIDIA RTX A4000 | Difference |
|---|---|---|---|
| Qwen3-4B tok/s | 212.05 | 116.23 | +82% |
| Llama-3.1-8B tok/s | 135.51 | 75.52 | +79% |
| Qwen2.5-Coder-14B tok/s | 74.6 | 41.13 | +81% |
| Qwen3-32B tok/s | 34.44 | 0 | n/a |
| Llama-3.3-70B tok/s | 16.49 | 0 | n/a |
| Stable Diffusion XL images/min | 17.02 | 5.24 | +225% |
| FLUX.1 dev images/min | 3.836 | 0 | n/a |
| FLUX.1 Kontext dev images/min | 1.693 | 0 | n/a |
| Qwen-Image-Edit images/min | 1.06 | 0 | n/a |
| Wan 2.2 5B (720p) frames/s | 0.49 | 0 | n/a |
Whole-job comparison
How long each card takes to finish a complete pipeline, not just one model. NVIDIA L40S is faster on 1 of 1; NVIDIA RTX A4000 on 0.
| Workflow | NVIDIA L40S | NVIDIA RTX A4000 | Difference | Cost per run |
|---|---|---|---|---|
| Full codebase review | 13.5 min | 24.3 min | NVIDIA L40S 1.81x faster | $0.177 vs $0.069 |
Renting by the hour, NVIDIA RTX A4000 finishes 1 of 1 cheaper. The quicker card is not automatically the cheaper way to get the work done.
Cost to rent
| Card | Per hour |
|---|---|
| NVIDIA L40S | $0.790 |
| NVIDIA RTX A4000 | $0.170 |
NVIDIA RTX A4000 is 4.65x cheaper per hour. Cheapest on-demand rate we see across RunPod and Vast.
Specifications compared
| NVIDIA L40S | NVIDIA RTX A4000 | |
|---|---|---|
| VRAM | 48GB | 16GB |
| Architecture | Ada Lovelace | Ampere |
| Memory bandwidth | 864 GB/s | 448 GB/s |
| Boost clock | 2,520 MHz | 1,560 MHz |
| TDP | 350 W | 140 W |
| Launch MSRP | $7,500 | $999 |
| Release | 2023-08-08 | 2021-04-12 |
FAQ
- Which is better for ai & machine learning: NVIDIA L40S or NVIDIA RTX A4000?
- NVIDIA L40S performs better for ai & machine learning, winning 10 of 10 benchmarks in our suite with an average 117% advantage.
- What are the main hardware differences between NVIDIA L40S and NVIDIA RTX A4000?
- NVIDIA L40S has 48GB VRAM and a 350W TDP, while NVIDIA RTX A4000 has 16GB VRAM and a 140W TDP.
- Does VRAM matter more than speed between NVIDIA L40S and NVIDIA RTX A4000?
- For AI, yes, NVIDIA RTX A4000 fits 2 more of our 12 workloads than NVIDIA L40S. 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 L40S and NVIDIA RTX A4000?
- Stable Diffusion XL: NVIDIA L40S leads by roughly 225% (17.02 vs 5.24 images/min) in our testing.
NVIDIA L40S full review · NVIDIA RTX A4000 full review · All AI & Machine Learning rankings