Specifications Compared
| Spec | B300 | RTX-4000-ADA |
|---|---|---|
| TDP | 1200W | 130W |
| VRAM | 288 GB | 20 GB |
| Memory Type | HBM3e | GDDR6 |
| Architecture | Blackwell Ultra | Ada Lovelace |
| Form Factors | SXM | PCIe |
| Interconnect | NVSwitch, NVLink | |
| FP8 Performance | 4,500 TFLOPS | |
| FP16 Performance | 2,250 TFLOPS | 26.7 TFLOPS |
| FP32 Performance | 90 TFLOPS | 26.7 TFLOPS |
| FP64 Performance | 45 TFLOPS | |
| INT8 Performance | 4,500 TOPS | 427 TOPS |
| Memory Bandwidth | 12,000 GB/s | 360 GB/s |
Performance Analysis
Compute performance shows stark contrasts: the B300 delivers 2250 TFLOPS in FP16 and 90 TFLOPS in FP32, dwarfing the RTX 4000 Ada's 26.7 TFLOPS in both FP16 and FP32. This FP16 to FP32 delta on the B300, with FP16 over 25 times higher than FP32, optimizes mixed-precision training for large language models, reducing memory usage while accelerating convergence. The RTX 4000 Ada's balanced 26.7 TFLOPS across FP16 and FP32 suits general-purpose rendering or smaller inference tasks but limits scalability.
Memory capacity and bandwidth profoundly impact real-world usage. The B300's 288 GB HBM3e VRAM and 12000 GB/s bandwidth support enormous batch sizes in training, fitting models with hundreds of billions of parameters without swapping. The RTX 4000 Ada's 20 GB GDDR6 and 360 GB/s bandwidth restrict it to smaller batches or models under 10 billion parameters, increasing iteration times. For inference, the B300's FP8 at 4500 TFLOPS enables ultra-low latency on massive models, while the RTX 4000 Ada handles modest deployments efficiently.
Power efficiency reveals trade-offs. The B300's 1200W TDP demands robust cooling and power infrastructure for sustained peak performance, ideal for cloud clusters. The RTX 4000 Ada's 130W TDP enables deployment in compact systems with minimal overhead.
Live Cloud Pricing
Real-time prices from 25+ providers. Updated every 60 seconds.
B300
| 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 | |||
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 |
RTX 4000 Ada
| Provider | GPU Model | VRAM | Host Specs | Region | Price | Status | Action | |
|---|---|---|---|---|---|---|---|---|
![]() RunPod | NVIDIA RTX 4000 Ada Generation 20GB VRAM | 20GB | 8 vCPU 50GB RAM | 🌍global | $0.26/GPU/hr | |||
![]() Vast.ai | NVIDIA RTX 4000 Ada Generation 20GB VRAM | 20GB | 64 vCPU 42GB RAM 505GB Storage | Hungary | $0.40/GPU/hr | Available | ||
![]() RunPod | NVIDIA RTX 4000 Ada Generation 20GB VRAM | 20GB | 8 vCPU 50GB RAM | 🌍global | $0.44/GPU/hr | |||
![]() RunPod | NVIDIA RTX 4000 Ada Generation 20GB VRAM | 20GB | 0 vCPU 0GB RAM | 🌍global | $0.57/GPU/hr |
When to Choose the B300
Opt for the B300 in large-scale AI training or inference where models exceed 20 GB VRAM, such as trillion-parameter LLMs. Its 288 GB HBM3e and 12000 GB/s bandwidth handle massive batch sizes, while 2250 TFLOPS FP16 accelerates convergence by orders of magnitude. Datacenter environments with NVLink interconnects maximize multi-GPU scaling at $2.45 per hour starting price.
When to Choose the RTX 4000 Ada
Select the RTX 4000 Ada for budget-conscious prototyping, fine-tuning small models, or Stable Diffusion workflows under 20 GB VRAM. Its 130W TDP fits workstations without high power costs, and 26.7 TFLOPS FP32 supports real-time rendering at $0.09 per hour. Low interconnect needs make it ideal for single-GPU development.
Use Cases
The B300's 288 GB HBM3e VRAM and 2250 TFLOPS FP16 support training models with hundreds of billions of parameters at large batch sizes. The RTX 4000 Ada's 20 GB limits it to tiny models.
With 4500 TFLOPS FP8 and 12000 GB/s bandwidth, the B300 serves massive LLMs at low latency. The RTX 4000 Ada's 20 GB VRAM restricts it to smaller models.
B300 handles full fine-tuning of large models via 288 GB VRAM and high FP16 throughput. RTX 4000 Ada works for parameter-efficient methods on small datasets only.
RTX 4000 Ada's 26.7 TFLOPS FP32 and 20 GB VRAM suffice for image generation at $0.09 per hour. B300 is overkill for typical resolutions.
B300 excels in memory-intensive simulations with 288 GB VRAM; RTX 4000 Ada fits FP32-heavy tasks like molecular dynamics at low 130W TDP.
Frequently Asked Questions
What is the VRAM difference between B300 and RTX 4000 Ada?▾
The B300 provides 288 GB HBM3e VRAM, while the RTX 4000 Ada has 20 GB GDDR6. This allows the B300 to load models 14 times larger without offloading. Bandwidth is 12000 GB/s versus 360 GB/s.
How do FP16 performances compare?▾
B300 achieves 2250 TFLOPS FP16, over 84 times the RTX 4000 Ada's 26.7 TFLOPS. This gap accelerates AI training significantly. FP32 is 90 TFLOPS versus 26.7 TFLOPS.
What are the cloud prices for these GPUs?▾
B300 starts at $2.45 per hour average $6.44 per hour across 7 offers. RTX 4000 Ada is from $0.09 per hour average $0.22 per hour across 9 offers. Pricing reflects scale differences.
Which has higher power consumption?▾
B300 TDP is 1200W, suited for datacenters. RTX 4000 Ada uses 130W for workstations. This affects deployment costs and cooling needs.
Can RTX 4000 Ada handle large LLMs?▾
No, its 20 GB VRAM limits it to models under 10B parameters. B300's 288 GB supports trillion-parameter LLMs. Use RTX 4000 Ada for inference on small models only.
What architectures do they use?▾
B300 uses Blackwell Ultra from 2025 with FP8 at 4500 TFLOPS. RTX 4000 Ada is Ada Lovelace 2023. B300 targets AI hyperscale.
Which is cheaper to rent, the B300 or the RTX 4000 Ada?▾
Cloud rental prices for both the B300 and RTX 4000 Ada 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 4000 Ada?▾
The B300 has 288 GB of HBM3e memory. The RTX 4000 Ada has 20 GB of GDDR6 memory.
Can I find B300 and RTX 4000 Ada 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 4000 Ada?▾
The B300 uses the Blackwell Ultra architecture (2025) while the RTX 4000 Ada uses Ada Lovelace (2023). The B300 delivers 84.3x the FP16 throughput and 33.3x the memory bandwidth of the RTX 4000 Ada.

