Specifications Compared
| Spec | B300 | L40 |
|---|---|---|
| TDP | 1400W | 300W |
| VRAM | 262-288 GB | 48 GB |
| CUDA Cores | Not published | 18,176 |
| FP4 (dense) | 13,500 TFLOPS | Not published |
| FP8 (dense) | 4,500 TFLOPS | 362 TFLOPS |
| Memory Type | HBM3e | GDDR6 |
| Architecture | Blackwell Ultra | Ada Lovelace |
| FP16 (dense) | 2,250 TFLOPS | 181.05 TFLOPS |
| Form Factors | SXM6 | PCIe |
| INT8 (dense) | 187.5 TOPS | 362 TOPS |
| Interconnect | NVLink, PCIe 6.0, InfiniBand | PCIe 4.0 |
| Tensor Cores | Not published | 568 |
| FP32 Performance | 75 TFLOPS | 90.5 TFLOPS |
| FP64 Performance | 1.25 TFLOPS | Not published |
| Memory Bandwidth | 8,000 GB/s | 864 GB/s |
| FP4 (with sparsity) | 18,000 TFLOPS | Not published |
| FP8 (with sparsity) | 9,000 TFLOPS | 724 TFLOPS |
| FP16 (with sparsity) | 4,500 TFLOPS | 362.1 TFLOPS |
| INT8 (with sparsity) | 375 TOPS | 724 TOPS |
Performance Analysis
The FP16 dense performance of the B300 at 2250 TFLOPS exceeds that of the L40 at 181.05 TFLOPS by a significant margin. This delta indicates that the B300 can handle larger batch sizes in training scenarios due to its 8000 GB per second memory bandwidth versus 864 GB per second on the L40. For inference the FP8 dense figure on the B300 reaches 4500 TFLOPS while the L40 achieves 362 TFLOPS. The FP32 performance shows the L40 at 90.5 TFLOPS slightly ahead of the B300 at 75 TFLOPS.
Current On-Demand Offers
Cheapest secure on-demand offer per provider that is reported in stock right now, per GPU per hour; multi-GPU instances show the whole-instance price alongside. Deploy opens the DeployGPU console for providers on the platform, otherwise the provider's own site. Stock is rechecked every minute.
B300
1 provider in stock, 1 offer. All B300 offers, price history and alerts
L40
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| ThunderCompute | USA | 2 | $0.79 | $1.58 | Deploy |
| RunPod | global | 1 | $0.82 | — | Deploy |
| Massed Compute | us-central-3 | 4 | $0.86 | $3.44 | Deploy |
| QuantaCloud | us-midwest-2 | 4 | $0.94 | $3.75 | Deploy |
| Hyperstack | CANADA-1 | 1 | $1.00 | — | Deploy |
5 providers in stock, 18 offers (cheapest per provider shown). All L40 offers, price history and alerts
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When to Choose the B300
The B300 suits applications that demand high memory capacity such as training models that exceed 48 GB requirements. Its 262 to 288 GB VRAM and 8000 GB per second bandwidth support larger batch sizes in LLM training.
When to Choose the L40
The L40 fits into environments with lower power constraints at 300W TDP compared to 1400W on the B300. It provides adequate performance for smaller scale inference tasks with its 48 GB memory.
Use Cases
The B300 provides FP16 dense performance of 2250 TFLOPS and 262 to 288 GB memory that enable training of large models.
The B300 achieves FP8 dense performance of 4500 TFLOPS with 8000 GB per second bandwidth for high throughput inference.
The B300 FP16 dense figure of 2250 TFLOPS and high memory capacity support efficient fine tuning of large models.
The L40 delivers FP32 performance of 90.5 TFLOPS at 300W TDP for image generation workloads.
The L40 offers FP32 performance of 90.5 TFLOPS which exceeds the B300 at 75 TFLOPS.
Frequently Asked Questions
How does the FP16 dense performance compare between these GPUs?▾
The B300 delivers 2250 TFLOPS in FP16 dense while the L40 reaches 181.05 TFLOPS in FP16 dense.
What is the TDP of the B300 compared to the L40?▾
The B300 has a TDP of 1400W and the L40 has a TDP of 300W.
Which GPU has higher memory bandwidth?▾
The B300 has 8000 GB per second memory bandwidth compared to 864 GB per second on the L40.
What FP32 performance do the B300 and L40 offer?▾
The B300 provides 75 TFLOPS in FP32 and the L40 provides 90.5 TFLOPS in FP32.
What interconnect does the B300 support?▾
The B300 supports NVLink, PCIe 6.0, and InfiniBand while the L40 supports PCIe 4.0.
Which is cheaper to rent, the B300 or the L40?▾
Cloud rental prices for both the B300 and L40 vary by provider, configuration, and availability. This page shows live pricing from 25+ providers updated every 60 seconds. Scroll to the Live Cloud Pricing section to compare current rates.
How much VRAM does the B300 have compared to the L40?▾
The B300 has 262 to 288 GB of HBM3e memory. The L40 has 48 GB of GDDR6 memory.
Can I find B300 and L40 GPUs available to rent right now?▾
Yes. This page shows real-time availability across 25+ cloud GPU providers. The Live Cloud Pricing section displays only in-stock offers with current pricing.
What is the main difference between the B300 and the L40?▾
The B300 uses the Blackwell Ultra architecture (2025) while the L40 uses Ada Lovelace (2023). The B300 delivers 12.4x the dense FP16 throughput (2,250 vs 181.05 TFLOPS, both without sparsity) and 9.3x the memory bandwidth of the L40.
Rent these GPUs
Each GPU page lists every current on-demand offer by provider, per GPU-hour, updated every minute.
Related comparisons
How this page is made
- Specifications come from the NVIDIA, AMD and Intel datasheets for the B300 and the L40. Dense and sparse throughput are listed separately.
- Prices and availability are live: every offer shown is an in-stock, on-demand listing from a provider we track, rechecked every minute.
- The written comparison (overview, performance notes, when to choose each card, verdict, use cases and FAQ) was drafted with an AI model from the specification table above and passed an automated check that rejects any figure not in that table. It was last generated on . It contains no prices; those are always read live.
- Read how we collect the data, or report an error on this page.
Next steps
- Rent B300Every current offer by provider, daily price history and a price alert.
- Rent L40Every current offer by provider, daily price history and a price alert.
- GPU price indexHow on-demand prices for the major GPUs have moved, updated daily.
- All GPUsEvery GPU we track, with current lows and provider counts.