Specifications Compared
| Spec | B300 | GB300 |
|---|---|---|
| TDP | 1200W | 1400W |
| VRAM | 288 GB | 288 GB |
| Memory Type | HBM3e | HBM3e |
| Architecture | Blackwell Ultra | Blackwell Ultra |
| Form Factors | SXM | SXM |
| Interconnect | NVSwitch, NVLink | NVSwitch, NVLink |
| FP8 Performance | 4,500 TFLOPS | 4,500 TFLOPS |
| FP16 Performance | 2,250 TFLOPS | 2,250 TFLOPS |
| FP32 Performance | 90 TFLOPS | 90 TFLOPS |
| FP64 Performance | 45 TFLOPS | 45 TFLOPS |
| INT8 Performance | 4,500 TOPS | 4,500 TOPS |
| Memory Bandwidth | 12,000 GB/s | 12,000 GB/s |
Performance Analysis
Compute specifications align completely between the B300 SXM6 and GB300 SXM6. The 2250 TFLOPS FP16 rating excels in AI training pipelines, where models like large language models process vast datasets in half-precision to accelerate convergence. FP32 at 90 TFLOPS handles precision-sensitive tasks such as physics simulations without compromise.
FP8 performance reaches 4500 TFLOPS on both, optimizing inference for quantized models with minimal accuracy loss. Memory bandwidth of 12000 GB/s supports enormous batch sizes in training and inference, reducing latency from data transfers and enabling efficient scaling across multi-GPU nodes.
TDP marks the key variance: 1200W for B300 SXM6 versus 1400W for GB300 SXM6. The GB300's higher power envelope could sustain peak FLOPS longer under thermal limits, benefiting extended workloads, while the B300 prioritizes efficiency in constrained power budgets.
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 | NVIDIA B300 SXM6 262GB VRAM | 262GB | 30 vCPU 255GB RAM | Helsinki | $7.50/GPU/hr | Available | ||
VERDA | 2×NVIDIA B300 SXM6 262GB VRAM | 262GB | 60 vCPU 510GB RAM | Helsinki | $7.50/GPU/hr $15.00/hr total (2×) | Available | ||
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
The B300 SXM6 excels in power-sensitive data centers. Its 1200W TDP draws 200W less than the GB300 SXM6's 1400W, cutting electricity and cooling expenses by approximately 14 percent. Availability drives selection: cloud instances start at $2.45 per hour with an average of $6.44 per hour across 7 providers, enabling rapid deployment for time-critical AI projects.
When to Choose the GB300 SXM6
The GB300 SXM6 fits environments prioritizing peak sustained performance. The 1400W TDP allows higher power allocation, potentially maintaining 2250 TFLOPS FP16 longer in intensive training runs compared to the B300 SXM6's 1200W limit. It suits facilities with robust power and cooling infrastructure, despite no current cloud offers.
Use Cases
The B300 SXM6's 1200W TDP offers better power efficiency for prolonged training sessions utilizing 2250 TFLOPS FP16. Lower costs from $2.45 per hour make it preferable over the unavailable GB300 SXM6.
Both provide 4500 TFLOPS FP8 and 12000 GB/s bandwidth for high-throughput inference. Selection depends on power constraints versus sustained performance needs.
B300 SXM6's availability and 1200W TDP suit iterative fine-tuning workflows with 288 GB VRAM. It avoids delays from GB300 SXM6's lack of live offers.
Identical 90 TFLOPS FP32 and memory specs handle image generation equally. Power budget determines choice between 1200W and 1400W TDP.
GB300 SXM6's 1400W TDP supports sustained 90 TFLOPS FP32 in compute-intensive simulations. It outperforms in power-abundant setups despite no current pricing.
Frequently Asked Questions
What is the main difference between NVIDIA B300 SXM6 and GB300 SXM6?▾
The B300 SXM6 has a 1200W TDP, while the GB300 SXM6 requires 1400W. All other specs match: 288 GB HBM3e VRAM, 12000 GB/s bandwidth, and 2250 TFLOPS FP16.
What are the cloud prices for B300 SXM6?▾
Pricing starts from $2.45 per hour, averaging $6.44 per hour across 7 live offers. The GB300 SXM6 has no live cloud offers currently.
Do B300 SXM6 and GB300 SXM6 have the same FP16 performance?▾
Yes, both deliver 2250 TFLOPS FP16, 90 TFLOPS FP32, and 4500 TFLOPS FP8. They share Blackwell Ultra architecture.
What memory specs do these GPUs offer?▾
Each provides 288 GB HBM3e VRAM at 12000 GB/s bandwidth. This supports large batch sizes in AI workloads.
Are B300 SXM6 and GB300 SXM6 suitable for NVLink clusters?▾
Both use SXM form factor with NVSwitch and NVLink interconnects. They scale efficiently in multi-GPU setups.
Which has lower power consumption?▾
The B300 SXM6 consumes 1200W TDP versus 1400W for GB300 SXM6. This yields about 14 percent better efficiency.
Which is cheaper to rent, the B300 or the GB300?▾
Cloud rental prices for both the B300 and GB300 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 GB300?▾
The B300 has 288 GB of HBM3e memory. The GB300 has 288 GB of HBM3e memory.
Can I find B300 and GB300 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 GB300?▾
The B300 uses the Blackwell Ultra architecture (2025) while the GB300 uses Blackwell Ultra (2025). The GB300 delivers 1.0x the FP16 throughput and 1.0x the memory bandwidth of the B300.