A100 vs B300: Specs, VRAM & Price
Short answer: choose the B300 when 288 GB of VRAM is the gating requirement. Choose the A100 when 80 GB is enough for the workload and the lower hourly rate points that way.
The A100 has 80 GB of VRAM; the B300 has 288 GB.
You can rent both by the hour, no purchase required. A100 from $1.10/GPU/hr; B300 from $9.89/GPU/hr. The A100 is 89% cheaper at the entry rate.
A100
Good for training and inference on models that don't need FP8 kernels
B300
Good for training and serving frontier-scale LLMs
Last updated: 2026-10-10 17:44:22 UTCRefreshes hourly
Specs side by side
| Spec | A100 | B300 |
|---|---|---|
| VRAM | 80 GB | 288 GB |
| Memory bandwidth | 2,039 GB/s | – |
| Architecture | Ampere | Blackwell Ultra |
| Compute capability | 8.0 | 10.3 |
| Precisions in hardware | FP32, FP16, BF16, INT4 | FP32, FP16, BF16, FP8, INT4 |
| Peak FP16/BF16 tensor TFLOPS | 312 TFLOPS | – |
| NVLink / multi-GPU interconnect | NVLink 3, 600 GB/s | – |
| Max board power (TDP) | 400W (SXM) | – |
| Form factor | SXM4 | SXM6 |
| Regions | 6 | 2 |
On-demand price
| Rate | A100 | B300 |
|---|---|---|
| Lowest per GPU/hr | $1.49/GPU/hr | $9.89/GPU/hr |
Which is better for AI: A100 or B300?
Choose the B300 when 288 GB of VRAM is the gating requirement. Choose the A100 when 80 GB is enough for the workload and the lower hourly rate points that way.
A100 vs B300: common questions
Is the A100 or the B300 better for AI?
Short answer: choose the B300 when 288 GB of VRAM is the gating requirement. Choose the A100 when 80 GB is enough for the workload and the lower hourly rate points that way.
Is the A100 or the B300 cheaper to rent?
On Aquanode's live marketplace the A100 starts at $1.10/GPU/hr (median $1.97/GPU/hr) and the B300 starts at $9.89/GPU/hr (median $9.89/GPU/hr). The A100 is the cheaper of the two at the entry rate, by 89%.
What is the difference between the A100 and the B300?
The A100 has 80 GB of VRAM against the B300's 288 GB; the A100 is an Ampere part and the B300 is Blackwell Ultra (compute capability 8.0 vs 10.3); only the B300 supports FP8 compute. On price, the A100 lists from $1.10/GPU/hr and the B300 from $9.89/GPU/hr.
How widely available are the A100 and the B300?
The A100 is listed in 6 regions and the B300 in 2 regions right now.
How much does 1,000 GPU-hours cost on the A100 vs the B300?
At the lowest rates listed today, 1,000 GPU-hours costs $1,102 on the A100 and $9,889 on the B300, a difference of $8,787 for the same runtime. Rates are per GPU per hour and update hourly.
How much VRAM does the A100 have compared to the B300?
The A100 has 80 GB of VRAM; the B300 has 288 GB.
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 A100 page and B300 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 A100 VRAM calculator and the B300 VRAM calculator, see vendor-published throughput in the GPU benchmarks and specs table, or browse every model by generation in the GPU index.
More A100 comparisons
More B300 comparisons
Related reading: A100 pricing and specs, A100 vs H100, A100 vs V100, and The best GPUs for AI, ranked.
