B200 vs RTX 4090: Specs, VRAM & Price
Short answer: choose the B200 when 180 GB of VRAM is the gating requirement. Choose the RTX 4090 when 24 GB is enough for the workload and the lower hourly rate points that way.
The B200 has 180 GB of VRAM; the RTX 4090 has 24 GB.
You can rent both by the hour, no purchase required. B200 from $8.79/GPU/hr; RTX 4090 from $0.374/GPU/hr. The RTX 4090 is 96% cheaper at the entry rate.
B200
Good for training and serving frontier-scale LLMs
RTX 4090
Good for inference and light fine-tuning workloads
Last updated: 2026-10-10 21:18:44 UTCRefreshes hourly
Specs side by side
| Spec | B200 | RTX 4090 |
|---|---|---|
| VRAM | 180 GB | 24 GB |
| Memory bandwidth | 8 TB/s | 1,008 GB/s |
| Architecture | Blackwell | Ada Lovelace |
| Compute capability | 10.0 | 8.9 |
| Precisions in hardware | FP32, FP16, BF16, FP8, INT4 | FP32, FP16, BF16, FP8, INT4 |
| Peak FP16/BF16 tensor TFLOPS | 2,250 TFLOPS | – |
| Peak FP8 tensor TFLOPS | 4,500 TFLOPS | – |
| NVLink / multi-GPU interconnect | NVLink 5, 1.8 TB/s per GPU | – |
| Max board power (TDP) | Up to 1,000W | 450W |
| Form factor | SXM | PCIe 4.0 x16 |
| Regions | 3 | 3 |
On-demand price
| Rate | B200 | RTX 4090 |
|---|---|---|
| Lowest per GPU/hr | $8.79/GPU/hr | $0.761/GPU/hr |
Which is better for AI: B200 or RTX 4090?
Choose the B200 when 180 GB of VRAM is the gating requirement. Choose the RTX 4090 when 24 GB is enough for the workload and the lower hourly rate points that way.
B200 vs RTX 4090: common questions
Is the B200 or the RTX 4090 better for AI?
Short answer: choose the B200 when 180 GB of VRAM is the gating requirement. Choose the RTX 4090 when 24 GB is enough for the workload and the lower hourly rate points that way.
Is the B200 or the RTX 4090 cheaper to rent?
On Aquanode's live marketplace the B200 starts at $8.79/GPU/hr (median $8.79/GPU/hr) and the RTX 4090 starts at $0.374/GPU/hr (median $0.774/GPU/hr). The RTX 4090 is the cheaper of the two at the entry rate, by 96%.
What is the difference between the B200 and the RTX 4090?
The B200 has 180 GB of VRAM against the RTX 4090's 24 GB; the B200 is a Blackwell part and the RTX 4090 is Ada Lovelace (compute capability 10.0 vs 8.9); both run BF16, FP8, INT4 workloads in hardware. On price, the B200 lists from $8.79/GPU/hr and the RTX 4090 from $0.374/GPU/hr.
How widely available are the B200 and the RTX 4090?
The B200 is listed in 3 regions and the RTX 4090 in 3 regions right now.
How much does 1,000 GPU-hours cost on the B200 vs the RTX 4090?
At the lowest rates listed today, 1,000 GPU-hours costs $8,789 on the B200 and $374 on the RTX 4090, a difference of $8,415 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the B200 have compared to the RTX 4090?
The B200 has 180 GB of VRAM; the RTX 4090 has 24 GB.
Does the B200 or the RTX 4090 support NVLink?
The B200 supports NVLink 5, 1.8 TB/s per GPU; the RTX 4090 has no dedicated GPU-to-GPU interconnect.
How this comparison is calculated
Every price is normalized to a per-GPU hourly rate using the same pipeline as every other pricing surface on Aquanode, and only the cheapest qualifying offer per provider is shown. A dash means that provider does not currently list that GPU.
Architecture, compute capability and supported precisions come from each vendor's published datasheet for that generation, not from the marketplace feed. This page regenerates at most once per hour.
Memory bandwidth, tensor TFLOPS, NVLink/interconnect and max board power are the same verified-from-datasheet figures shown on each model's own B200 page and RTX 4090 page, which link the primary vendor source for that model. A dash here means Aquanode hasn't verified that figure from a primary source yet, never a guess.
Go further
Check what fits in each card's memory with the B200 VRAM calculator and the RTX 4090 VRAM calculator, see vendor-published throughput in the GPU benchmarks and specs table, or browse every model by generation in the GPU index.
More B200 comparisons
More RTX 4090 comparisons
Related reading: B200 pricing and specs, NVIDIA B200 guide, B300 vs B200, H200 vs B200 vs GB200, and The best GPUs for AI, ranked.
