Specifications Compared
| Spec | B300 SXM6 | RTX 3090 Ti |
|---|---|---|
| TDP | 1400W | 350W |
| VRAM | 262 GB | 24 GB |
| CUDA Cores | Not published | 10,496 |
| FP4 (dense) | 13,500 TFLOPS | Not published |
| FP8 (dense) | 4,500 TFLOPS | Not published |
| Memory Type | HBM3e | GDDR6X |
| Architecture | Blackwell Ultra | Ampere |
| FP16 (dense) | 2,250 TFLOPS | Not published |
| Form Factors | SXM6 | PCIe |
| INT8 (dense) | 187.5 TOPS | Not published |
| Interconnect | NVLink, PCIe 6.0, InfiniBand | NVLink |
| Tensor Cores | Not published | 328 |
| FP32 Performance | 75 TFLOPS | 35.6 TFLOPS |
| FP64 Performance | 1.25 TFLOPS | Not published |
| Memory Bandwidth | 8,000 GB/s | 936 GB/s |
| FP4 (with sparsity) | 18,000 TFLOPS | Not published |
| FP8 (with sparsity) | 9,000 TFLOPS | Not published |
| FP16 (with sparsity) | 4,500 TFLOPS | Not published |
| INT8 (with sparsity) | 375 TOPS | Not published |
| FP16 (vendor figure, sparsity not specified) | Not published | 35.6 TFLOPS |
Performance Analysis
The FP16 dense figure of 2250 TFLOPS on the B300 SXM6 exceeds the 35.6 TFLOPS FP16 figure on the RTX 3090 Ti by a wide margin and supports substantially larger training and inference workloads without sparsity. FP32 performance stands at 75 TFLOPS for the B300 SXM6 family compared with 35.6 TFLOPS for the RTX 3090 Ti family, indicating the B300 SXM6 handles higher precision computations more effectively. Memory bandwidth of 8000 GB/s shared by every B300 variant enables larger batch sizes than the 936 GB/s shared by every RTX 3090 variant during both training and inference operations.
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 SXM6
1 provider in stock, 2 offers (cheapest per provider shown). All B300 SXM6 offers, price history and alerts
RTX 3090 Ti
| Provider | Region | GPUs | Per GPU / hr | Instance / hr | Deploy |
|---|---|---|---|---|---|
| LeaderGPU | The Netherlands | 8 | $0.29 | $2.29 | Deploy |
| Vast.ai | Czechia, CZ | 4 | $0.37 | $1.48 | Deploy |
2 providers in stock, 9 offers (cheapest per provider shown). All RTX 3090 Ti offers, price history and alerts
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When to Choose the B300 SXM6
The B300 SXM6 suits scenarios that require 262 GB memory capacity and 2250 TFLOPS dense FP16 throughput such as training models that exceed the limits of smaller memory configurations. Its SXM6 form factor and 1400W TDP align with data center deployments that prioritize high interconnect bandwidth through NVLink and InfiniBand.
When to Choose the RTX 3090 Ti
The RTX 3090 Ti fits workloads that operate within 24 GB memory and 35.6 TFLOPS FP16 performance such as smaller scale inference or development tasks on PCIe systems. Its 350W TDP supports installations where lower power draw and standard PCIe connectivity take precedence over maximum throughput.
Use Cases
The B300 SXM6 supplies 262 GB memory and 2250 TFLOPS dense FP16 that exceed the 24 GB and 35.6 TFLOPS limits of the RTX 3090 Ti for large models.
The B300 SXM6 processes inference at 2250 TFLOPS dense FP16 with 8000 GB/s bandwidth while the RTX 3090 Ti remains at 35.6 TFLOPS and 936 GB/s.
The B300 SXM6 variant with 262 GB HBM3e supports fine-tuning of models larger than those possible on the 24 GB GDDR6X of the RTX 3090 Ti.
The RTX 3090 Ti delivers adequate 35.6 TFLOPS FP16 performance within its 24 GB memory for typical Stable Diffusion workloads at lower 350W TDP.
The B300 SXM6 provides 75 TFLOPS FP32 and 8000 GB/s bandwidth that surpass the 35.6 TFLOPS FP32 and 936 GB/s of the RTX 3090 Ti for demanding simulations.
Frequently Asked Questions
What memory capacities distinguish the B300 SXM6 from the RTX 3090 Ti?▾
The B300 SXM6 variant holds 262 GB HBM3e while the RTX 3090 Ti variant holds 24 GB GDDR6X. These capacities remain fixed for the specific models under comparison.
How do the FP16 figures compare between the two GPUs?▾
The B300 SXM6 family reports 2250 TFLOPS dense FP16 and the RTX 3090 Ti reports 35.6 TFLOPS FP16. Direct comparison uses the dense value against the vendor figure provided.
What TDP values apply to each GPU family?▾
The B300 family including the SXM6 variant lists 1400W TDP while the RTX 3090 family including the 3090 Ti lists 350W TDP. These figures apply uniformly across variants within each family.
Which interconnect options appear on the B300 SXM6 variant?▾
The B300 SXM6 includes NVLink, PCIe 6.0 and InfiniBand interconnects. The RTX 3090 Ti lists only NVLink as its interconnect option.
What memory bandwidth values are shared within each GPU family?▾
The B300 family shares 8000 GB/s memory bandwidth across variants while the RTX 3090 family shares 936 GB/s memory bandwidth across variants. These numbers provide context for the specific models compared.
Which is cheaper to rent, the B300 SXM6 or the RTX 3090 Ti?▾
Cloud rental prices for both the B300 SXM6 and RTX 3090 Ti 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 SXM6 have compared to the RTX 3090 Ti?▾
The B300 SXM6 has 262 GB of HBM3e memory. The RTX 3090 Ti has 24 GB of GDDR6X memory.
Can I find B300 SXM6 and RTX 3090 Ti 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 SXM6 and the RTX 3090 Ti?▾
The B300 SXM6 uses the Blackwell Ultra architecture (2025) while the RTX 3090 Ti uses Ampere (2020). The B300 SXM6 delivers 31.7x the dense FP16 throughput (2,250 vs 71 TFLOPS, both without sparsity) and 8.5x the memory bandwidth of the RTX 3090 Ti.
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 SXM6 and the RTX 3090 Ti. 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
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