NVIDIA GeForce RTX 4090 vs NVIDIA RTX A4000, AI & Machine Learning Comparison
NVIDIA GeForce RTX 4090 wins 6 of 10 benchmarks, averaging 148.2% 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 GeForce RTX 4090 leads by 211% (16.28 vs 5.24 images/min); the closest fight is Qwen3 4B (124% apart); VRAM decides part of this one: NVIDIA GeForce RTX 4090 runs 8 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 GeForce RTX 4090 | NVIDIA RTX A4000 | Difference |
|---|---|---|---|
| Qwen3 4B tok/s | 260.54 | 116.23 | +124% |
| Llama 3.1 8B tok/s | 171.29 | 75.52 | +127% |
| Qwen2.5-Coder 14B tok/s | 95.12 | 41.13 | +131% |
| Qwen3 32B tok/s | 44.28 | 0 | n/a |
| Llama 3.3 70B tok/s | 0 | 0 | n/a |
| Stable Diffusion XL images/min | 16.28 | 5.24 | +211% |
| 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 | 0.43 | 0 | n/a |
Whole-job comparison
How long each card takes to finish a complete pipeline, not just one model. NVIDIA GeForce RTX 4090 is faster on 1 of 1; NVIDIA RTX A4000 on 0.
| Workflow | NVIDIA GeForce RTX 4090 | NVIDIA RTX A4000 | Difference | Cost per run |
|---|---|---|---|---|
| Full codebase review | 10.5 min | 24.3 min | NVIDIA GeForce RTX 4090 2.31x faster | $0.027 vs $0.069 |
Renting by the hour, NVIDIA GeForce RTX 4090 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 GeForce RTX 4090 | $0.155 |
| NVIDIA RTX A4000 | $0.170 |
NVIDIA GeForce RTX 4090 is 1.10x cheaper per hour. Cheapest on-demand rate we see across RunPod and Vast.
Specifications compared
| NVIDIA GeForce RTX 4090 | NVIDIA RTX A4000 | |
|---|---|---|
| VRAM | 24GB | 16GB |
| Architecture | Ada Lovelace | Ampere |
| Memory bandwidth | 1008 GB/s | 448 GB/s |
| Boost clock | 2,520 MHz | 1,560 MHz |
| TDP | 450 W | 140 W |
| Launch MSRP | $1,599 | $999 |
| Release | 2022-10-12 | 2021-04-12 |
FAQ
- Which is better for ai & machine learning: NVIDIA GeForce RTX 4090 or NVIDIA RTX A4000?
- NVIDIA GeForce RTX 4090 performs better for ai & machine learning, winning 6 of 10 benchmarks in our suite with an average 148.2% advantage.
- What are the main hardware differences between NVIDIA GeForce RTX 4090 and NVIDIA RTX A4000?
- NVIDIA GeForce RTX 4090 has 24GB VRAM and a 450W TDP, while NVIDIA RTX A4000 has 16GB VRAM and a 140W TDP.
- Does VRAM matter more than speed between NVIDIA GeForce RTX 4090 and NVIDIA RTX A4000?
- For AI, yes, NVIDIA GeForce RTX 4090 fits 2 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 GeForce RTX 4090 and NVIDIA RTX A4000?
- Stable Diffusion XL: NVIDIA GeForce RTX 4090 leads by roughly 211% (16.28 vs 5.24 images/min) in our testing.
NVIDIA GeForce RTX 4090 full review · NVIDIA RTX A4000 full review · All AI & Machine Learning rankings