B300 vs RTX 4070

Blackwell UltravsAda LovelaceUpdated 36 days ago

The B300 emerges as the superior choice for most AI and machine learning workloads due to its 288 GB VRAM, 12000 GB/s bandwidth, and 2250 TFLOPS FP16 performance, enabling tasks infeasible on the RTX 4070. While the RTX 4070 offers value at $0.19 per hour average, the B300's capabilities justify $6.44 per hour for production-scale efficiency.

B300 from $7.39/hrRTX 4070 from $0.50/hr

Specifications Compared

SpecB300RTX-4070
TDP1200W200W
VRAM288 GB12 GB
Memory TypeHBM3eGDDR6X
ArchitectureBlackwell UltraAda Lovelace
Form FactorsSXMPCIe
InterconnectNVSwitch, NVLink
FP8 Performance4,500 TFLOPS
FP16 Performance2,250 TFLOPS29.1 TFLOPS
FP32 Performance90 TFLOPS29.1 TFLOPS
FP64 Performance45 TFLOPS
INT8 Performance4,500 TOPS466 TOPS
Memory Bandwidth12,000 GB/s504 GB/s

Performance Analysis

The B300's FP16 performance of 2250 TFLOPS vastly exceeds the RTX 4070's 29.1 TFLOPS, enabling faster AI training and inference on large datasets. Its FP32 output of 90 TFLOPS remains superior to the RTX 4070's 29.1 TFLOPS, though the delta in FP16 highlights optimization for mixed-precision workflows common in deep learning. This disparity means training epochs complete in fractions of the time on the B300.

Memory bandwidth profoundly impacts real-world usage: the B300's 12000 GB/s supports enormous batch sizes without bottlenecks, ideal for models exceeding 100 billion parameters. The RTX 4070's 504 GB/s limits it to smaller batches, risking out-of-memory errors on complex tasks. Consequently, the B300 handles high-throughput inference at scales unattainable by the RTX 4070.

Power consumption reveals efficiency trade-offs. The B300's 1200W TDP suits dense server racks with NVSwitch and NVLink interconnects, while the RTX 4070's 200W TDP fits PCIe slots for edge or desktop use. These specs translate to the B300 dominating enterprise AI and the RTX 4070 suiting power-constrained prototyping.

Live Cloud Pricing

Real-time prices from 25+ providers. Updated every 60 seconds.

B300

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
RunPod
RunPod
NVIDIA B300 SXM6
262GB VRAM
$7.39/GPU/hr
VERDA
VERDA
8×NVIDIA B300 SXM6
262GB VRAM
$7.50/GPU/hr
$60.00/hr total (8×)
Available
Scaleway
Scaleway
8×NVIDIA B300 SXM6
262GB VRAM
$8.73/GPU/hr
$69.84/hr total (8×)
Available

RTX 4070

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
RunPod
RunPod
NVIDIA GeForce RTX 4070 Ti
12GB VRAM
$0.50/GPU/hr

Compare real-time pricing across 25+ providers

When to Choose the B300

The B300 excels in scenarios demanding immense scale, such as training large language models requiring over 288 GB VRAM. Its 12000 GB/s bandwidth and 2250 TFLOPS FP16 performance enable handling trillion-parameter models without multi-GPU complexity via NVLink.

Datacenter deployments benefit from its SXM form factor and 4500 TFLOPS FP8 for ultra-efficient inference on hyperscale clusters.

When to Choose the RTX 4070

The RTX 4070 suits budget-conscious users for prototyping or small-scale inference, with pricing from $0.07 per hour. Its 12 GB VRAM and 29.1 TFLOPS FP16 suffice for fine-tuning models under 7 billion parameters or running Stable Diffusion locally.

Power-sensitive environments favor its 200W TDP and PCIe compatibility, ideal for individual developers testing ideas before scaling.

Use Cases

LLM Training
B300

The B300's 288 GB HBM3e VRAM and 2250 TFLOPS FP16 handle massive datasets and trillion-parameter models. The RTX 4070's 12 GB limits it to tiny models.

LLM Inference
B300

With 12000 GB/s bandwidth and 4500 TFLOPS FP8, the B300 supports high-throughput serving of large models. The RTX 4070 struggles beyond small batches due to 504 GB/s.

Fine-tuning
B300

B300's 90 TFLOPS FP32 and vast VRAM accelerate fine-tuning on billion-parameter models. RTX 4070 works for sub-7B models but scales poorly.

Stable Diffusion
RTX 4070

RTX 4070's 29.1 TFLOPS FP16 and 12 GB VRAM generate images efficiently at low $0.19 per hour cost. B300 is overkill for this consumer task.

Scientific Computing
Either

RTX 4070 handles FP32 simulations at 29.1 TFLOPS affordably; B300's 90 TFLOPS FP32 excels for large-scale HPC with 288 GB VRAM.

Frequently Asked Questions

What is the VRAM difference between B300 and RTX 4070?

The B300 offers 288 GB HBM3e VRAM, compared to 12 GB GDDR6X on the RTX 4070. This enables the B300 to load massive AI models entirely in memory. The RTX 4070 suits smaller workloads.

How do their FP16 performances compare?

B300 achieves 2250 TFLOPS in FP16, far surpassing the RTX 4070's 29.1 TFLOPS. This results in dramatically faster AI training on the B300. Inference speeds follow the same trend.

What are the cloud pricing ranges?

B300 pricing starts at $2.45 per hour, averaging $6.44 per hour across seven offers. RTX 4070 begins at $0.07 per hour, averaging $0.19 per hour across nine offers. Costs reflect their capability gaps.

Which has higher memory bandwidth?

The B300 provides 12000 GB/s, versus 504 GB/s on the RTX 4070. Higher bandwidth on B300 supports larger batch sizes in training. RTX 4070 faces bottlenecks sooner.

What are their TDP ratings?

B300 consumes 1200W TDP in SXM form, optimized for datacenters. RTX 4070 uses 200W TDP in PCIe, fitting desktops. Power needs align with use cases.

Can RTX 4070 handle LLM fine-tuning?

RTX 4070 manages fine-tuning for models under 7 billion parameters with 12 GB VRAM. Larger models require B300's 288 GB. Performance hits 29.1 TFLOPS FP16.

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 288 GB of HBM3e memory. The RTX 4070 has 12 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 77.3x the FP16 throughput and 23.8x the memory bandwidth of the RTX 4070.

B300 vs RTX 4070: 77.3x FP16 Gap, 288GB vs 12GB | GPUPerHour