Specifications Compared
| Spec | RTX 3090 Ti | RTX 4090 |
|---|---|---|
| TDP | 350W | 450W |
| VRAM | 24 GB | 24 GB |
| CUDA Cores | 10,496 | 16,384 |
| FP8 (dense) | Not published | 330.3 TFLOPS |
| Memory Type | GDDR6X | GDDR6X |
| Architecture | Ampere | Ada Lovelace |
| FP16 (dense) | Not published | 165.2 TFLOPS |
| Form Factors | PCIe | PCIe |
| INT8 (dense) | Not published | 660.6 TOPS |
| Interconnect | NVLink | PCIe 4.0 |
| Tensor Cores | 328 | 512 |
| FP32 Performance | 35.6 TFLOPS | 82.6 TFLOPS |
| FP64 Performance | Not published | 1.3 TFLOPS |
| Memory Bandwidth | 936 GB/s | 1,008 GB/s |
| FP8 (with sparsity) | Not published | 660.6 TFLOPS |
| FP16 (with sparsity) | Not published | 330.4 TFLOPS |
| INT8 (with sparsity) | Not published | 1,321.2 TOPS |
| FP16 (vendor figure, sparsity not specified) | 35.6 TFLOPS | Not published |
Performance Analysis
The RTX 3090 Ti delivers 35.6 TFLOPS in FP16 with sparsity not specified and 35.6 TFLOPS in FP32 while the RTX 4090 provides 165.2 TFLOPS dense FP16 and 82.6 TFLOPS FP32. This dense FP16 gap means the RTX 4090 completes matrix operations in training workloads at over four times the rate of the RTX 3090 Ti when both run dense computations. Memory bandwidth shared across each family at 936 GB/s for the RTX 3090 Ti and 1008 GB/s for the RTX 4090 directly limits maximum batch sizes during inference with the higher figure supporting modestly larger batches before memory stalls occur.
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.
RTX 3090 Ti
1 provider in stock, 8 offers (cheapest per provider shown). All RTX 3090 Ti offers, price history and alerts
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When to Choose the RTX 3090 Ti
The RTX 3090 Ti variant suits multi GPU configurations that require NVLink interconnect for direct high speed communication between cards. Its 350W TDP also fits systems where power delivery and cooling capacity remain constrained compared to the 450W requirement of the RTX 4090 variant.
When to Choose the RTX 4090
Its PCIe 4.0 interconnect aligns with modern server platforms that lack NVLink support yet demand higher overall compute density.
Use Cases
The RTX 4090 variant supplies 165.2 TFLOPS dense FP16 compared to 35.6 TFLOPS on the RTX 3090 Ti variant allowing faster completion of large matrix multiplications.
Higher dense FP16 throughput of 165.2 TFLOPS and 1008 GB/s bandwidth on the RTX 4090 variant support larger batch processing than the 35.6 TFLOPS and 936 GB/s of the RTX 3090 Ti variant.
The RTX 4090 variant achieves 82.6 TFLOPS FP32 versus 35.6 TFLOPS on the RTX 3090 Ti variant reducing time required for gradient updates during adaptation of pretrained models.
Dense FP16 performance of 165.2 TFLOPS on the RTX 4090 variant accelerates diffusion steps compared to the 35.6 TFLOPS rating of the RTX 3090 Ti variant.
Both variants provide 24 GB GDDR6X memory though the RTX 4090 variant offers higher FP32 throughput of 82.6 TFLOPS while the RTX 3090 Ti variant provides NVLink for distributed simulations.
Frequently Asked Questions
How does FP32 performance differ between these variants?▾
The RTX 3090 Ti variant lists 35.6 TFLOPS FP32 while the RTX 4090 variant lists 82.6 TFLOPS FP32.
Which variant supports NVLink?▾
The RTX 3090 Ti variant includes NVLink interconnect whereas the RTX 4090 variant uses PCIe 4.0 interconnect.
What are the TDP ratings for these two variants?▾
The RTX 3090 Ti variant carries a 350W TDP and the RTX 4090 variant carries a 450W TDP as family figures shared across variants.
How does memory bandwidth compare?▾
The RTX 3090 Ti family bandwidth stands at 936 GB/s and the RTX 4090 family bandwidth stands at 1008 GB/s.
Are the form factors identical?▾
Both the RTX 3090 Ti variant and the RTX 4090 variant use the PCIe form factor.
Which is cheaper to rent, the RTX 3090 Ti or the RTX 4090?▾
Cloud rental prices for both the RTX 3090 Ti and RTX 4090 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 RTX 3090 Ti have compared to the RTX 4090?▾
The RTX 3090 Ti has 24 GB of GDDR6X memory. The RTX 4090 has 24 GB of GDDR6X memory.
Can I find RTX 3090 Ti and RTX 4090 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 RTX 3090 Ti and the RTX 4090?▾
The RTX 3090 Ti uses the Ampere architecture (2020) while the RTX 4090 uses Ada Lovelace (2022). The RTX 4090 delivers 2.3x the dense FP16 throughput (165.2 vs 71 TFLOPS, both without sparsity) and 1.1x 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 RTX 3090 Ti and the RTX 4090. 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 RTX 3090Every current offer by provider, daily price history and a price alert.
- Rent RTX 4090Every current offer by provider, daily price history and a price alert.
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