Specifications Compared
| Spec | B300 | RTX-3080 |
|---|---|---|
| TDP | 1200W | 320W |
| VRAM | 288 GB | 10-12 GB |
| Memory Type | HBM3e | GDDR6X |
| Architecture | Blackwell Ultra | Ampere |
| Form Factors | SXM | PCIe |
| Interconnect | NVSwitch, NVLink | |
| FP8 Performance | 4,500 TFLOPS | |
| FP16 Performance | 2,250 TFLOPS | 29.8 TFLOPS |
| FP32 Performance | 90 TFLOPS | 29.8 TFLOPS |
| FP64 Performance | 45 TFLOPS | |
| INT8 Performance | 4,500 TOPS | |
| Memory Bandwidth | 12,000 GB/s | 760 GB/s |
Performance Analysis
The B300's FP16 performance of 2250 TFLOPS vastly exceeds the RTX 3080's 29.8 TFLOPS: this disparity accelerates deep learning training by enabling higher throughput for models using half-precision floats. For inference, B300's FP8 capability at 4500 TFLOPS further optimizes low-precision deployments, reducing latency in production environments.
FP32 performance shows B300 at 90 TFLOPS against RTX 3080's 29.8 TFLOPS, indicating B300's focus on AI tensor operations over traditional graphics rendering. The memory bandwidth gap, 12000 GB/s on B300 versus 760 GB/s on RTX 3080, supports batch sizes up to 15 times larger on B300, minimizing data loading bottlenecks during training.
Power consumption differs markedly with B300's 1200W TDP versus 320W: this allows B300 scaling in NVSwitch clusters but demands robust cooling, while RTX 3080 fits standard setups for efficient small-scale tasks.
Live Cloud Pricing
Real-time prices from 25+ providers. Updated every 60 seconds.
B300 SXM6
| Provider | GPU Model | VRAM | Host Specs | Region | Price | Status | Action | |
|---|---|---|---|---|---|---|---|---|
![]() RunPod | NVIDIA B300 SXM6 262GB VRAM | 262GB | 0 vCPU 0GB RAM | 🌍global | $7.39/GPU/hr | |||
VERDA | 8×NVIDIA B300 SXM6 262GB VRAM | 262GB | 240 vCPU 2040GB RAM | Helsinki | $7.50/GPU/hr $60.00/hr total (8×) | Available | ||
Scaleway | 8×NVIDIA B300 SXM6 262GB VRAM | 262GB | 224 vCPU 3840GB RAM 22352GB Storage | Paris | $8.73/GPU/hr $69.84/hr total (8×) | Available |
When to Choose the B300 SXM6
Select the B300 for large-scale AI training and inference workloads demanding over 288 GB VRAM, such as trillion-parameter LLMs. Its 2250 TFLOPS FP16 and 12000 GB/s bandwidth enable processing massive datasets without memory constraints, ideal for enterprise research at $2.45 per hour starting price.
B300 excels in multi-GPU clusters via NVLink, supporting distributed training where RTX 3080 lacks interconnects.
When to Choose the RTX 3080
Opt for RTX 3080 in budget-sensitive scenarios like prototyping small ML models or gaming at $0.06 per hour. Its 10-12 GB VRAM and 29.8 TFLOPS FP16 suffice for fine-tuning models under 10 billion parameters or Stable Diffusion generation.
RTX 3080's 320W TDP and PCIe form factor suit single-user desktops or low-power cloud instances without high infrastructure costs.
Use Cases
B300's 288 GB HBM3e VRAM and 2250 TFLOPS FP16 support training models with trillions of parameters. RTX 3080's 10-12 GB VRAM limits it to much smaller scales.
B300's 4500 TFLOPS FP8 and 12000 GB/s bandwidth enable high-throughput serving of large models. RTX 3080 struggles with memory for production-scale inference.
RTX 3080 handles fine-tuning of models under 10 billion parameters at $0.06 per hour. B300 is overkill unless datasets exceed 10-12 GB VRAM.
RTX 3080's 29.8 TFLOPS FP16 and 760 GB/s bandwidth generate images efficiently at low cost. B300's enterprise features add unnecessary expense.
B300's 90 TFLOPS FP32 and NVLink scaling accelerate simulations with large datasets. RTX 3080's lower specs limit complex computations.
Frequently Asked Questions
What is the VRAM difference between B300 and RTX 3080?▾
B300 offers 288 GB HBM3e VRAM. RTX 3080 provides 10-12 GB GDDR6X. This enables B300 to load massive AI models without swapping.
How do their FP16 performances compare?▾
B300 achieves 2250 TFLOPS in FP16. RTX 3080 reaches 29.8 TFLOPS. The gap translates to roughly 75 times faster AI training on B300.
What are the cloud pricing ranges?▾
B300 SXM6 starts at $2.45 per hour, averaging $6.44 per hour across 7 offers. RTX 3080 begins at $0.06 per hour, averaging $0.13 per hour across 4 offers.
Which has higher memory bandwidth?▾
B300 delivers 12000 GB/s. RTX 3080 provides 760 GB/s. B300 supports larger batch sizes for efficient training.
What are their TDPs?▾
B300 requires 1200W TDP in SXM form factor. RTX 3080 uses 320W in PCIe. B300 suits data centers; RTX 3080 fits consumer setups.
Is B300 better for LLM training?▾
Yes, B300's 288 GB VRAM and 2250 TFLOPS FP16 excel for large LLMs. RTX 3080's specs limit it to smaller models.
Which is cheaper to rent, the B300 or the RTX 3080?▾
Cloud rental prices for both the B300 and RTX 3080 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 3080?▾
The B300 has 288 GB of HBM3e memory. The RTX 3080 has 10 to 12 GB of GDDR6X memory.
Can I find B300 and RTX 3080 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 3080?▾
The B300 uses the Blackwell Ultra architecture (2025) while the RTX 3080 uses Ampere (2020). The B300 delivers 75.5x the FP16 throughput and 15.8x the memory bandwidth of the RTX 3080.
