Specifications Compared
| Spec | B300 | RTX 4070 |
|---|---|---|
| TDP | 1400W | 200W |
| VRAM | 262-288 GB | 12-16 GB |
| CUDA Cores | Not published | 5,888 |
| FP4 (dense) | 13,500 TFLOPS | Not published |
| FP8 (dense) | 4,500 TFLOPS | 116.6 TFLOPS |
| Memory Type | HBM3e | GDDR6X |
| Architecture | Blackwell Ultra | Ada Lovelace |
| FP16 (dense) | 2,250 TFLOPS | 58.3 TFLOPS |
| Form Factors | SXM6 | PCIe |
| INT8 (dense) | 187.5 TOPS | 233.2 TOPS |
| Interconnect | NVLink, PCIe 6.0, InfiniBand | PCIe 4.0 |
| Tensor Cores | Not published | 184 |
| FP32 Performance | 75 TFLOPS | 29.1 TFLOPS |
| FP64 Performance | 1.25 TFLOPS | Not published |
| Memory Bandwidth | 8,000 GB/s | 504 GB/s |
| FP4 (with sparsity) | 18,000 TFLOPS | Not published |
| FP8 (with sparsity) | 9,000 TFLOPS | 233.2 TFLOPS |
| FP16 (with sparsity) | 4,500 TFLOPS | 116.6 TFLOPS |
| INT8 (with sparsity) | 375 TOPS | 466.4 TOPS |
Performance Analysis
The FP16 dense performance ratio shows the B300 at 2250 TFLOPS exceeding the RTX 4070 at 58.3 TFLOPS by a factor derived directly from those values which supports larger model training batches through higher throughput. Memory bandwidth at 8000 GB/s on the B300 versus 504 GB/s on the RTX 4070 allows the B300 to sustain bigger batch sizes during inference without memory stalls. FP32 figures of 75 TFLOPS on the B300 and 29.1 TFLOPS on the RTX 4070 indicate the B300 handles precision sensitive scientific tasks at higher rates while sparsity labeled FP16 figures of 4500 TFLOPS on the B300 and 116.6 TFLOPS on the RTX 4070 follow the same pattern when compared only to like sparsity values.
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
RTX 4070
RTX 4070 is not offered on-demand by any provider we track right now. See the RTX 4070 rental page for last-seen listed prices and a price alert.
Notify me when B300 drops below a price
One email when the cheapest in-stock on-demand price per GPU-hour falls below your threshold. Cheapest right now: $0.50/GPU-hr.
QuantaCloud
Comparing B-series options? Get one quote for all of them.
Skip the per-provider sales calls. Reserved and cluster B-series configurations from 16 to 1024+ GPUs with InfiniBand fabric, 3 to 12 month terms. One quote at partner rates, 24h turnaround.
When to Choose the B300
The B300 suits large scale LLM training because its 262 to 288 GB HBM3e memory and 2250 TFLOPS FP16 dense rating accommodate models that exceed the 12 to 16 GB capacity of the RTX 4070. Workloads requiring 8000 GB/s bandwidth and 1400W TDP tolerance benefit from the B300 NVLink interconnect for multi GPU scaling.
When to Choose the RTX 4070
The RTX 4070 fits local development and inference on smaller models because its 200W TDP and PCIe form factor integrate into standard workstations without the 1400W power infrastructure needed by the B300. Tasks limited to 58.3 TFLOPS FP16 dense performance and 12 to 16 GB memory run efficiently on the RTX 4070 at lower overall system demands.
Use Cases
The B300 supplies 2250 TFLOPS FP16 dense and 262 to 288 GB memory that exceed the RTX 4070 58.3 TFLOPS FP16 dense and 12 to 16 GB limits.
The B300 8000 GB/s bandwidth sustains larger batches than the RTX 4070 504 GB/s bandwidth during extended inference runs.
The B300 4500 TFLOPS FP16 with sparsity rating supports fine tuning at scales beyond the RTX 4070 116.6 TFLOPS FP16 with sparsity rating.
The RTX 4070 200W TDP and 12 to 16 GB memory handle typical diffusion workloads without the 1400W requirement of the B300.
The B300 75 TFLOPS FP32 rating delivers higher throughput than the RTX 4070 29.1 TFLOPS FP32 rating for precision calculations.
Frequently Asked Questions
How does B300 FP16 dense performance compare to RTX 4070 FP16 dense performance?▾
The B300 reaches 2250 TFLOPS FP16 dense while the RTX 4070 reaches 58.3 TFLOPS FP16 dense. This difference appears directly in the listed specifications.
What memory bandwidth does the B300 provide versus the RTX 4070?▾
The B300 lists 8000 GB/s memory bandwidth and the RTX 4070 lists 504 GB/s memory bandwidth. These values determine data movement rates during compute.
Which GPU has higher INT8 dense performance?▾
The RTX 4070 lists 233.2 TOPS INT8 dense while the B300 lists 187.5 TOPS INT8 dense. The specifications show this reversal from FP16 trends.
What TDP values appear for each GPU?▾
The B300 carries a 1400W TDP and the RTX 4070 carries a 200W TDP. Power delivery systems must match these listed figures.
Does the B300 support NVLink?▾
The B300 specifications include NVLink interconnect while the RTX 4070 specifications list only PCIe 4.0. Multi GPU fabrics therefore differ by design.
Which is cheaper to rent, the B300 or the RTX 4070?▾
Cloud rental prices for both the B300 and RTX 4070 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 RTX 4070?▾
The B300 has 262 to 288 GB of HBM3e memory. The RTX 4070 has 12 to 16 GB of GDDR6X memory.
Can I find B300 and RTX 4070 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 RTX 4070?▾
The B300 uses the Blackwell Ultra architecture (2025) while the RTX 4070 uses Ada Lovelace (2023). The B300 delivers 38.6x the dense FP16 throughput (2,250 vs 58.3 TFLOPS, both without sparsity) and 15.9x the memory bandwidth of the RTX 4070.
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 RTX 4070. 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 RTX 4070Every 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.