Specifications Compared
| Spec | RTX 3090 | 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) | 71 TFLOPS | 165.2 TFLOPS |
| Form Factors | PCIe | PCIe |
| INT8 (dense) | 284 TOPS | 660.6 TOPS |
| Interconnect | NVLink, PCIe 4.0 | 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) | 142 TFLOPS | 330.4 TFLOPS |
| INT8 (with sparsity) | 568 TOPS | 1,321.2 TOPS |
Performance Analysis
Dense FP16 performance on the RTX 4090 reaches 165.2 TFLOPS compared with 71 TFLOPS dense FP16 on the RTX 3090. The same pattern appears in FP32 where the RTX 4090 lists 82.6 TFLOPS against 35.6 TFLOPS on the RTX 3090. These ratios indicate that training workloads using dense FP16 can complete more matrix operations per second on the RTX 4090. Memory bandwidth of 1008 GB/s on the RTX 4090 versus 936 GB/s on the RTX 3090 allows modestly larger batch sizes before memory becomes the limiter. Sparsity figures follow the same proportion with 330.4 TFLOPS on the RTX 4090 against 142 TFLOPS on the RTX 3090.
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.
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When to Choose the RTX 3090
The RTX 3090 suits deployments where NVLink connectivity is required for multi GPU scaling. Its 350W TDP also reduces power draw relative to the 450W TDP of the RTX 4090 in sustained operation. Workloads that fit within the 936 GB/s bandwidth and 71 TFLOPS dense FP16 remain viable on this card.
When to Choose the RTX 4090
Its 1008 GB/s memory bandwidth supports larger batches than the 936 GB/s available on the RTX 3090. Users who do not require NVLink gain higher throughput per card with the newer architecture.
Use Cases
The RTX 4090 supplies 165.2 TFLOPS dense FP16 against 71 TFLOPS dense FP16 on the RTX 3090.
Higher dense FP16 throughput of 165.2 TFLOPS on the RTX 4090 accelerates token generation compared with 71 TFLOPS on the RTX 3090.
The RTX 4090 FP32 rating of 82.6 TFLOPS exceeds the 35.6 TFLOPS rating of the RTX 3090 for gradient updates.
Memory bandwidth of 1008 GB/s on the RTX 4090 exceeds 936 GB/s on the RTX 3090 and supports larger image batches.
Both cards provide 24 GB GDDR6X yet the RTX 4090 adds higher dense FP16 at 165.2 TFLOPS while the RTX 3090 supplies NVLink.
Frequently Asked Questions
How does dense FP16 performance compare between the two GPUs?▾
The RTX 4090 lists 165.2 TFLOPS dense FP16. The RTX 3090 lists 71 TFLOPS dense FP16.
Which GPU offers higher memory bandwidth?▾
The RTX 4090 reaches 1008 GB/s. The RTX 3090 reaches 936 GB/s.
Does the RTX 3090 support NVLink?▾
The RTX 3090 includes NVLink interconnect. The RTX 4090 uses only PCIe 4.0.
What are the TDP values for each card?▾
The RTX 3090 TDP is 350W. The RTX 4090 TDP is 450W.
How do the FP32 ratings differ?▾
The RTX 4090 lists 82.6 TFLOPS FP32. The RTX 3090 lists 35.6 TFLOPS FP32.
Which is cheaper to rent, the RTX 3090 or the RTX 4090?▾
Cloud rental prices for both the RTX 3090 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 have compared to the RTX 4090?▾
The RTX 3090 has 24 GB of GDDR6X memory. The RTX 4090 has 24 GB of GDDR6X memory.
Can I find RTX 3090 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 and the RTX 4090?▾
The RTX 3090 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.
Rent these GPUs
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Related comparisons
How this page is made
- Specifications come from the NVIDIA, AMD and Intel datasheets for the RTX 3090 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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