Specifications Compared
| Spec | RTX 3090 | RTX 5090 |
|---|---|---|
| TDP | 350W | 575W |
| VRAM | 24 GB | 32 GB |
| CUDA Cores | 10,496 | 21,760 |
| FP4 (dense) | Not published | 1,676 TFLOPS |
| FP8 (dense) | Not published | 419 TFLOPS |
| Memory Type | GDDR6X | GDDR7 |
| Architecture | Ampere | Blackwell |
| FP16 (dense) | 71 TFLOPS | 209.5 TFLOPS |
| Form Factors | PCIe | PCIe |
| INT8 (dense) | 284 TOPS | 838 TOPS |
| Interconnect | NVLink, PCIe 4.0 | PCIe 5.0 |
| Tensor Cores | 328 | 680 |
| FP32 Performance | 35.6 TFLOPS | 104.8 TFLOPS |
| FP64 Performance | Not published | 1.6 TFLOPS |
| Memory Bandwidth | 936 GB/s | 1,792 GB/s |
| FP4 (with sparsity) | Not published | 3,352 TFLOPS |
| FP8 (with sparsity) | Not published | 838 TFLOPS |
| FP16 (with sparsity) | 142 TFLOPS | 419 TFLOPS |
| INT8 (with sparsity) | 568 TOPS | 1,676 TOPS |
Performance Analysis
This delta supports faster training iterations and higher throughput inference when models fit within the respective VRAM limits. Memory bandwidth of 1792 GB/s on the RTX 5090 compared with 936 GB/s on the RTX 3090 permits larger batch sizes during both training and inference without swapping to host memory. Sparse FP16 performance reaches 419 TFLOPS on the RTX 5090 against 142 TFLOPS on the RTX 3090 yet the same ratio holds only when sparsity is applied consistently across both cards.
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.
Notify me when RTX 3090 drops below a price
One email when the cheapest in-stock on-demand price per GPU-hour falls below your threshold. Cheapest right now: $0.27/GPU-hr.
QuantaCloud
Comparing providers? We broker across all of them.
Stop tab-switching between pricing pages. Tell us what you need, 16+ GPUs reserved or cluster capacity, and we return one quote at partner rates within 24 hours.
When to Choose the RTX 3090
The RTX 3090 remains preferable for workloads that stay within 24 GB VRAM and require only 71 TFLOPS dense FP16 or 35.6 TFLOPS FP32. Scientific computing tasks that run on PCIe interconnect with NVLink benefit from the lower 350W TDP without exceeding power budgets common in older server racks.
When to Choose the RTX 5090
The RTX 5090 suits applications that demand 32 GB VRAM and 209.5 TFLOPS dense FP16 such as large model inference or fine tuning where the 1792 GB/s bandwidth reduces data movement stalls. Newer PCIe 5.0 support further accelerates data loading compared with the PCIe 4.0 interface on the RTX 3090.
Use Cases
The RTX 5090 supplies 209.5 TFLOPS dense FP16 and 32 GB VRAM that accommodate larger models than the 71 TFLOPS dense FP16 and 24 GB on the RTX 3090.
Higher dense FP16 performance of 209.5 TFLOPS and 1792 GB/s bandwidth on the RTX 5090 enable greater tokens per second than the RTX 3090 specifications allow.
The RTX 5090 32 GB capacity and 419 TFLOPS sparse FP16 exceed the RTX 3090 limits for adapter based fine tuning workloads.
Both cards handle typical diffusion resolutions yet the RTX 5090 processes larger batches due to its 32 GB VRAM versus 24 GB on the RTX 3090.
The RTX 3090 350W TDP and NVLink interconnect meet requirements for many FP32 workloads at 35.6 TFLOPS without the higher power draw of 575W on the RTX 5090.
Frequently Asked Questions
What are the FP16 dense performance numbers?▾
The RTX 3090 reaches 71 TFLOPS dense FP16 and the RTX 5090 reaches 209.5 TFLOPS dense FP16. Training and inference speeds scale with these exact figures when sparsity is not enabled.
Which GPU has higher memory bandwidth?▾
The RTX 5090 lists 1792 GB/s while the RTX 3090 lists 936 GB/s. Larger batches become feasible on the higher bandwidth card during matrix operations.
What TDP values are specified?▾
The RTX 3090 TDP is 350W and the RTX 5090 TDP is 575W. Power supply and cooling requirements differ accordingly between the two cards.
Does the RTX 5090 support newer interconnect standards?▾
The RTX 5090 uses PCIe 5.0 while the RTX 3090 uses PCIe 4.0. NVLink remains available only on the RTX 3090 for multi GPU links.
Which is cheaper to rent, the RTX 3090 or the RTX 5090?▾
Cloud rental prices for both the RTX 3090 and RTX 5090 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 5090?▾
The RTX 3090 has 24 GB of GDDR6X memory. The RTX 5090 has 32 GB of GDDR7 memory.
Can I find RTX 3090 and RTX 5090 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 5090?▾
The RTX 3090 uses the Ampere architecture (2020) while the RTX 5090 uses Blackwell (2025). The RTX 5090 delivers 3.0x the dense FP16 throughput (209.5 vs 71 TFLOPS, both without sparsity) and 1.9x the memory bandwidth of the RTX 3090.
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 and the RTX 5090. 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 5090Every 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.