Specifications Compared
| Spec | B300 | RTX 4000 Ada |
|---|---|---|
| TDP | 1400W | 130W |
| VRAM | 262-288 GB | 20 GB |
| CUDA Cores | Not published | 6,144 |
| FP4 (dense) | 13,500 TFLOPS | Not published |
| FP8 (dense) | 4,500 TFLOPS | Not published |
| Memory Type | HBM3e | GDDR6 |
| Architecture | Blackwell Ultra | Ada Lovelace |
| FP16 (dense) | 2,250 TFLOPS | Not published |
| Form Factors | SXM6 | PCIe |
| INT8 (dense) | 187.5 TOPS | Not published |
| Interconnect | NVLink, PCIe 6.0, InfiniBand | PCIe 4.0 |
| Tensor Cores | Not published | 192 |
| FP32 Performance | 75 TFLOPS | 26.7 TFLOPS |
| FP64 Performance | 1.25 TFLOPS | Not published |
| Memory Bandwidth | 8,000 GB/s | 360 GB/s |
| FP4 (with sparsity) | 18,000 TFLOPS | Not published |
| FP8 (with sparsity) | 9,000 TFLOPS | 427.6 TFLOPS |
| FP16 (with sparsity) | 4,500 TFLOPS | Not published |
| INT8 (with sparsity) | 375 TOPS | Not published |
Performance Analysis
Dense FP16 performance reaches 2250 TFLOPS on the B300 whereas no FP16 figure is published for the RTX 4000 Ada. This gap means the B300 handles larger training and inference workloads that rely on dense FP16 operations. Memory bandwidth of 8000 GB/s on the B300 compared with 360 GB/s supports greater batch sizes during memory bound phases of computation. FP8 with sparsity attains 9000 TFLOPS on the B300 and 427.6 TFLOPS on the RTX 4000 Ada. The comparison of like sparsity figures shows the B300 advantage in sparse tensor workloads. FP32 at 75 TFLOPS versus 26.7 TFLOPS separates their suitability for general floating point tasks.
Current On-Demand Offers
Cheapest secure on-demand offer per provider that is reported in stock right now, per GPU per hour; multi-GPU instances show the whole-instance price alongside. Deploy opens the DeployGPU console for providers on the platform, otherwise the provider's own site. Stock is rechecked every minute.
B300
1 provider in stock, 1 offer. All B300 offers, price history and alerts
RTX 4000 Ada
RTX 4000 Ada is not offered on-demand by any provider we track right now. See the RTX 4000 Ada rental page for last-seen listed prices and a price alert.
Notify me when B300 drops below a price
One email when the cheapest in-stock on-demand price per GPU-hour falls below your threshold. Cheapest right now: $0.50/GPU-hr.
QuantaCloud
Comparing B-series options? Get one quote for all of them.
Skip the per-provider sales calls. Reserved and cluster B-series configurations from 16 to 1024+ GPUs with InfiniBand fabric, 3 to 12 month terms. One quote at partner rates, 24h turnaround.
When to Choose the B300
The B300 suits large model training and inference because it provides 262 to 288 GB VRAM together with 8000 GB/s bandwidth and 2250 TFLOPS dense FP16. Data center deployments that need NVLink and SXM6 form factor also favor the B300 over alternatives with lower capacity.
When to Choose the RTX 4000 Ada
The RTX 4000 Ada fits workstation environments that require 130W TDP and PCIe form factor. Tasks limited to 20 GB VRAM and 26.7 TFLOPS FP32 benefit from its lower power draw without exceeding the published specifications.
Use Cases
The B300 supplies 262 to 288 GB VRAM and 2250 TFLOPS dense FP16 which enable training of large models.
The B300 delivers 4500 TFLOPS dense FP8 and 8000 GB/s bandwidth which sustain high throughput inference.
The B300 offers 2250 TFLOPS dense FP16 and 262 to 288 GB VRAM which accommodate fine tuning of sizable models.
The RTX 4000 Ada provides 20 GB VRAM and 26.7 TFLOPS FP32 which suffice for moderate image generation workloads.
The B300 achieves 75 TFLOPS FP32 and 8000 GB/s bandwidth which support compute heavy scientific simulations.
Frequently Asked Questions
What is the memory bandwidth of each GPU?▾
The B300 reaches 8000 GB/s memory bandwidth and the RTX 4000 Ada reaches 360 GB/s memory bandwidth.
Which GPU has higher dense FP16 performance?▾
The B300 provides 2250 TFLOPS dense FP16 while no FP16 figure is published for the RTX 4000 Ada.
What TDP values are listed for the B300 and RTX 4000 Ada?▾
The B300 lists 1400W TDP and the RTX 4000 Ada lists 130W TDP.
What interconnect options appear on each card?▾
The B300 includes NVLink, PCIe 6.0, and InfiniBand while the RTX 4000 Ada includes PCIe 4.0.
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 262 to 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 has 262-288 GB of HBM3e at 8,000 GB/s; the RTX 4000 Ada has 20 GB of GDDR6 at 360 GB/s, so the B300 has 22.2x the memory bandwidth of the RTX 4000 Ada.
Rent these GPUs
Each GPU page lists every current on-demand offer by provider, per GPU-hour, updated every minute.
Related comparisons
How this page is made
- Specifications come from the NVIDIA, AMD and Intel datasheets for the B300 and the RTX 4000 Ada. Dense and sparse throughput are listed separately.
- Prices and availability are live: every offer shown is an in-stock, on-demand listing from a provider we track, rechecked every minute.
- The written comparison (overview, performance notes, when to choose each card, verdict, use cases and FAQ) was drafted with an AI model from the specification table above and passed an automated check that rejects any figure not in that table. It was last generated on . It contains no prices; those are always read live.
- Read how we collect the data, or report an error on this page.
Next steps
- Rent B300Every current offer by provider, daily price history and a price alert.
- Rent RTX 4000 ADAEvery current offer by provider, daily price history and a price alert.
- GPU price indexHow on-demand prices for the major GPUs have moved, updated daily.
- All GPUsEvery GPU we track, with current lows and provider counts.