NVIDIA GeForce RTX 5090 vs NVIDIA B300, AI & Machine Learning Comparison
NVIDIA B300 wins 8 of 9 benchmarks, averaging 178.5% faster.
Both cards were measured first-party on our bench, same suite, same test rig.
What the numbers say
The gap is widest in FLUX.1 dev, where NVIDIA B300 leads by 922% (2.036 vs 20.807 images/min); the closest fight is Qwen2.5-Coder 14B (6% apart).
Benchmark results head-to-head
| Benchmark | NVIDIA GeForce RTX 5090 | NVIDIA B300 | Difference |
|---|---|---|---|
| Qwen3 4B tok/s | 375.6 | 333.34 | +13% |
| Llama 3.1 8B tok/s | 268.14 | 287.23 | -7% |
| Qwen2.5-Coder 14B tok/s | 149.75 | 158.49 | -6% |
| Qwen3 32B tok/s | 71.15 | 83.68 | -15% |
| Llama 3.3 70B tok/s | 0 | 47.97 | n/a |
| Stable Diffusion XL images/min | 21.08 | 29.2 | -28% |
| Z-Image Turbo images/min | 10.725 | 39.675 | -73% |
| FLUX.1 dev images/min | 2.036 | 20.807 | -90% |
| Qwen-Image-Edit images/min | 0 | 8.14 | n/a |
Whole-job comparison
How long each card takes to finish a complete pipeline, not just one model. NVIDIA GeForce RTX 5090 is faster on 0 of 2; NVIDIA B300 on 2.
| Workflow | NVIDIA GeForce RTX 5090 | NVIDIA B300 | Difference | Cost per run |
|---|---|---|---|---|
| Full codebase review | 6.7 min | 6.3 min | NVIDIA B300 1.06x faster | $0.036 vs $0.730 |
| 24-frame storyboard | 12.5 min | 1.5 min | NVIDIA B300 8.31x faster | $0.067 vs $0.174 |
Renting by the hour, NVIDIA GeForce RTX 5090 finishes 2 of 2 cheaper. The quicker card is not automatically the cheaper way to get the work done.
Cost to rent
| Card | Per hour |
|---|---|
| NVIDIA GeForce RTX 5090 | $0.321 |
| NVIDIA B300 | $6.940 |
NVIDIA GeForce RTX 5090 is 21.62x cheaper per hour. Cheapest on-demand rate we see across RunPod and Vast.
Specifications compared
| NVIDIA GeForce RTX 5090 | NVIDIA B300 | |
|---|---|---|
| VRAM | 32GB | 288GB |
| Architecture | Blackwell (GB202) | Blackwell Ultra |
| Memory bandwidth | 1792 GB/s | 8 TB/s |
| Boost clock | 2,407 MHz | n/a |
| TDP | 575 W | 1400 W |
| Launch MSRP | $1,999 | $40,000 |
| Release | 2025-01-30 | 2025-11-01 |
FAQ
- Which is better for ai & machine learning: NVIDIA GeForce RTX 5090 or NVIDIA B300?
- NVIDIA B300 performs better for ai & machine learning, winning 8 of 9 benchmarks in our suite with an average 178.5% advantage.
- What are the main hardware differences between NVIDIA GeForce RTX 5090 and NVIDIA B300?
- NVIDIA GeForce RTX 5090 has 32GB VRAM and a 575W TDP, while NVIDIA B300 has 288GB VRAM and a 1400W TDP.
- Where is the biggest performance difference between NVIDIA GeForce RTX 5090 and NVIDIA B300?
- FLUX.1 dev: NVIDIA B300 leads by roughly 922% (2.036 vs 20.807 images/min) in our testing.
NVIDIA GeForce RTX 5090 full review · NVIDIA B300 full review · All AI & Machine Learning rankings