Specifications Compared
| Spec | B300 | RTX-A4000 |
|---|---|---|
| TDP | 1200W | 140W |
| VRAM | 288 GB | 16 GB |
| Memory Type | HBM3e | GDDR6 |
| Architecture | Blackwell Ultra | Ampere |
| Form Factors | SXM | PCIe |
| Interconnect | NVSwitch, NVLink | |
| FP8 Performance | 4,500 TFLOPS | |
| FP16 Performance | 2,250 TFLOPS | 19.2 TFLOPS |
| FP32 Performance | 90 TFLOPS | 19.2 TFLOPS |
| FP64 Performance | 45 TFLOPS | |
| INT8 Performance | 4,500 TOPS | |
| Memory Bandwidth | 12,000 GB/s | 448 GB/s |
Performance Analysis
The NVIDIA B300 SXM6 excels in AI due to its FP16 performance of 2250 TFLOPS vastly exceeding FP32 at 90 TFLOPS: this ratio optimizes mixed-precision training for large language models, accelerating convergence without accuracy loss. The RTX A4500 shows balanced FP16 at 47.4 TFLOPS and FP32 at 23.7 TFLOPS, suitable for general compute but 48 times slower in FP16 than B300. Memory bandwidth defines real-world limits: B300's 12000 GB/s supports enormous batch sizes and model parameters, enabling single-GPU training of 100B+ parameter models, whereas A4500's 560 GB/s restricts batches in memory-bound inference. VRAM disparity is stark: 288 GB HBM3e on B300 loads full datasets in high-resolution simulations, avoiding swaps that slow A4500's 20 GB GDDR6. Power draw reflects scale: B300's 1200W TDP demands datacenter cooling, while A4500's 200W fits workstations. Overall, B300 transforms inference via 4500 TFLOPS FP8, slashing latency for trillion-parameter serving.
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 |
RTX A4500
| Provider | GPU Model | VRAM | Host Specs | Region | Price | Status | Action | |
|---|---|---|---|---|---|---|---|---|
![]() TensorDock | NVIDIA RTX A4000 16GB VRAM | 16GB | 0 vCPU 0GB RAM | Tallinn, Harjumaa | $0.08/GPU/hr | Available | ||
![]() Vast.ai | 8×NVIDIA RTX A4000 16GB VRAM | 16GB | 80 vCPU 201GB RAM 1698GB Storage | United Kingdom | $0.15/GPU/hr $1.17/hr total (8×) | Available | ||
![]() Hyperstack | 4×NVIDIA RTX A4000 16GB VRAM | 16GB | 16 vCPU 86GB RAM 500GB Storage | Norway | $0.15/GPU/hr $0.60/hr total (4×) | Available | ||
![]() Hyperstack | 2×NVIDIA RTX A4000 16GB VRAM | 16GB | 8 vCPU 43GB RAM 200GB Storage | Norway | $0.15/GPU/hr $0.30/hr total (2×) | Available | ||
![]() Hyperstack | NVIDIA RTX A4000 16GB VRAM | 16GB | 4 vCPU 21GB RAM 100GB Storage | Norway | $0.15/GPU/hr | Available |
When to Choose the B300 SXM6
Choose the NVIDIA B300 SXM6 for large-scale LLM training or inference where 288 GB HBM3e VRAM fits entire models without sharding. Its 12000 GB/s bandwidth and 2250 TFLOPS FP16 handle trillion-parameter workloads efficiently across NVLink and NVSwitch interconnects. Datacenter deployments justify $2.45 per hour starting pricing for production AI at exascale.
When to Choose the RTX A4500
The NVIDIA RTX A4500 suits budget-conscious prototyping, fine-tuning small models under 20 GB VRAM, or Stable Diffusion generation. Its PCIe form factor and 200W TDP enable easy workstation integration at $0.10 per hour average cost. Low interconnect needs match visualization or light inference tasks.
Use Cases
B300's 288 GB VRAM and 2250 TFLOPS FP16 support full large-model training without multi-node setups. A4500's 20 GB limits scale severely.
4500 TFLOPS FP8 on B300 enables high-throughput serving of trillion-parameter LLMs. A4500's 47.4 TFLOPS FP16 suits only small models.
B300 handles parameter-efficient fine-tuning on 288 GB VRAM with 12000 GB/s bandwidth for large batches. A4500 works for models under 20 GB.
A4500's 20 GB GDDR6 and 560 GB/s bandwidth generate images efficiently at low $0.19 per hour average. B300 overkill for single-user creative tasks.
B300's 90 TFLOPS FP32 and NVSwitch excel in parallel simulations. A4500's 23.7 TFLOPS suffices for modest datasets.
Frequently Asked Questions
What is the VRAM difference between NVIDIA B300 SXM6 and RTX A4500?▾
The B300 SXM6 has 288 GB HBM3e VRAM, enabling massive models. The A4500 provides 20 GB GDDR6, suitable for smaller workloads. This 14.4 times gap impacts batch sizes directly.
How do cloud prices compare for these GPUs?▾
B300 SXM6 starts at $2.45 per hour, averaging $6.44 across 7 offers. A4500 begins at $0.10 per hour, averaging $0.19 across 4 offers. Pricing reflects performance disparity.
What are the FP16 performance specs?▾
B300 SXM6 delivers 2250 TFLOPS FP16 for AI acceleration. A4500 achieves 47.4 TFLOPS FP16 with tensor cores. B300 is 47.5 times faster.
Which has higher memory bandwidth?▾
B300 SXM6 offers 12000 GB/s with HBM3e. A4500 provides 560 GB/s on GDDR6. The 21.4 times advantage aids data-heavy tasks on B300.
What are the TDP ratings?▾
B300 SXM6 requires 1200W for datacenter use. A4500 uses 200W, fitting workstations. Power scales with compute capacity.
What form factors do they support?▾
B300 SXM6 uses SXM for dense servers with NVLink. A4500 employs PCIe for single-system versatility. B300 suits clusters.
Which is cheaper to rent, the B300 or the RTX A4000?▾
Cloud rental prices for both the B300 and RTX A4000 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 A4000?▾
The B300 has 288 GB of HBM3e memory. The RTX A4000 has 16 GB of GDDR6 memory.
Can I find B300 and RTX A4000 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 A4000?▾
The B300 uses the Blackwell Ultra architecture (2025) while the RTX A4000 uses Ampere (2021). The B300 delivers 117.2x the FP16 throughput and 26.8x the memory bandwidth of the RTX A4000.



