B300 SXM6 vs RTX 4070

Blackwell UltravsAda LovelaceUpdated 35 days ago

The NVIDIA B300 SXM6 emerges as the clear winner for dominant cloud GPU use cases like AI training and inference. Its 288 GB VRAM, 2250 TFLOPS FP16, and 12000 GB/s bandwidth enable scaling massive models infeasible on RTX 4070's 12 GB and 29.1 TFLOPS, despite higher $6.44 per hour average cost.

B300 SXM6 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 NVIDIA B300 SXM6 vastly outpaces the RTX 4070 in compute throughput: 2250 TFLOPS FP16 on B300 compared to 29.1 TFLOPS on RTX 4070 enables dramatically faster AI model training and inference. This FP16 delta means training large language models completes over 77 times quicker on B300, while FP32 at 90 TFLOPS versus 29.1 TFLOPS accelerates general-purpose simulations. The B300's FP8 capability at 4500 TFLOPS further optimizes low-precision inference tasks common in deployment. Memory specifications define real-world usability: 288 GB HBM3e VRAM on B300 handles models exceeding 100 billion parameters without offloading, whereas 12 GB GDDR6X on RTX 4070 limits users to smaller batches or quantized models. Bandwidth at 12000 GB/s versus 504 GB/s allows B300 to process batch sizes 20 times larger, reducing per-token latency in inference by minimizing data movement bottlenecks. Power draw reflects this: 1200W TDP for B300 demands robust cooling, contrasting RTX 4070's efficient 200W.

Live Cloud Pricing

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

B300 SXM6

ProviderGPU ModelVRAMHost SpecsRegionPriceStatusAction
RunPod
RunPod
NVIDIA B300 SXM6
262GB VRAM
$7.39/GPU/hr
VERDA
VERDA
NVIDIA B300 SXM6
262GB VRAM
$7.50/GPU/hr
Available
VERDA
VERDA
2×NVIDIA B300 SXM6
262GB VRAM
$7.50/GPU/hr
$15.00/hr total (2×)
Available
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 SXM6

Opt for the NVIDIA B300 SXM6 in large-scale AI training where 288 GB HBM3e VRAM accommodates full-precision models up to 1 trillion parameters. Its 12000 GB/s bandwidth sustains massive batch sizes in distributed setups via NVLink and NVSwitch, ideal for research labs or enterprises running FP16 workloads at 2250 TFLOPS. Cloud deployments at $2.45 per hour justify the cost for production inference on Blackwell Ultra hardware.

When to Choose the RTX 4070

The NVIDIA GeForce RTX 4070 suits budget-conscious prototyping or gaming with its 12 GB GDDR6X VRAM and 200W TDP fitting standard PCIe slots. It excels in fine-tuning small models under 7 billion parameters or Stable Diffusion at 29.1 TFLOPS FP16, where $0.07 per hour pricing across cloud offers minimizes expenses. Developers testing inference on quantized LLMs find its efficiency unmatched for single-user tasks.

Use Cases

LLM Training
B300 SXM6

B300's 288 GB HBM3e VRAM and 2250 TFLOPS FP16 handle massive datasets and models without sharding. RTX 4070's 12 GB limits it to tiny models.

LLM Inference
B300 SXM6

12000 GB/s bandwidth on B300 supports large batch sizes for low-latency serving of 100B+ parameter models. RTX 4070 suits only quantized small LLMs.

Fine-tuning
Either

B300 excels for full models with 288 GB VRAM; RTX 4070 suffices for datasets under 12 GB at 29.1 TFLOPS FP16.

Stable Diffusion
RTX 4070

RTX 4070's 12 GB GDDR6X generates images efficiently at 504 GB/s bandwidth. B300 overkill for consumer diffusion tasks.

Scientific Computing
B300 SXM6

B300's 90 TFLOPS FP32 and NVLink scale simulations across clusters. RTX 4070 adequate only for single-node FP32 at 29.1 TFLOPS.

Frequently Asked Questions

What is the VRAM capacity of NVIDIA B300 SXM6 versus RTX 4070?

NVIDIA B300 SXM6 provides 288 GB HBM3e VRAM for enormous models. RTX 4070 offers 12 GB GDDR6X, suitable for smaller workloads.

How do cloud prices compare for these GPUs?

B300 SXM6 starts at $2.45 per hour with $6.44 average across seven offers. RTX 4070 begins at $0.07 per hour averaging $0.14 over two offers.

Which has higher FP16 performance?

B300 achieves 2250 TFLOPS FP16, over 77 times RTX 4070's 29.1 TFLOPS. This gap accelerates AI training significantly.

What are the power requirements?

B300 SXM6 consumes 1200W TDP for datacenter use. RTX 4070 uses 200W, ideal for desktops or light servers.

Can RTX 4070 handle large LLM inference?

RTX 4070's 12 GB VRAM restricts it to models under 7B parameters or heavy quantization. B300's 288 GB supports full-scale deployment.

What interconnects does B300 support?

B300 uses NVSwitch and NVLink for multi-GPU scaling. RTX 4070 lacks dedicated interconnects, relying on PCIe.

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 SXM6 vs RTX 4070: 77.3x FP16 Gap, 288GB vs 12GB | GPUPerHour